JPH0796407A - Abrasion resistant cermet cutting tool and method of manufacturing the same - Google Patents
Abrasion resistant cermet cutting tool and method of manufacturing the sameInfo
- Publication number
- JPH0796407A JPH0796407A JP23982993A JP23982993A JPH0796407A JP H0796407 A JPH0796407 A JP H0796407A JP 23982993 A JP23982993 A JP 23982993A JP 23982993 A JP23982993 A JP 23982993A JP H0796407 A JPH0796407 A JP H0796407A
- Authority
- JP
- Japan
- Prior art keywords
- cutting tool
- range
- cermet cutting
- cermet
- outermost surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 58
- 239000011195 cermet Substances 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- 238000005299 abrasion Methods 0.000 title description 2
- 239000002184 metal Substances 0.000 claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 239000002344 surface layer Substances 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims abstract description 14
- 238000002441 X-ray diffraction Methods 0.000 claims abstract description 13
- 125000001475 halogen functional group Chemical group 0.000 claims abstract description 10
- 150000004767 nitrides Chemical class 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 6
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 230000000740 bleeding effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 238000010306 acid treatment Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- -1 iron group metals Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910002441 CoNi Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000011260 aqueous acid Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 210000000416 exudates and transudate Anatomy 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Powder Metallurgy (AREA)
Abstract
(57)【要約】
【目的】 耐溶着性に優れた耐摩耗性サーメット製切削
工具及びその製造方法に関する。
【構成】 最表面層のＸ線回折における鉄族金属の強度
Ｉｃに対する硬質分散相を構成する炭化物、窒化物、炭
窒化物及び複炭窒化物の強度Ｉｍの比Ｉｍ／Ｉｃが特定
の範囲内にあり、かつ非晶質部分に由来するハローパタ
ーンが存在し、さらに工具断面における最高硬さが最表
面より特定の深さ位置にある耐溶着性に優れた耐摩耗性
サーメット製切削工具及びＴｉ基を主とする硬質分散相
形成成分と鉄族金属成分とからなるサーメット製切削工
具の表面に化学処理または電気化学的処理を施すことに
よる前記サーメット製切削工具の製造方法。
【効果】 極軟鋼の切削に用いた場合にも、優れた耐融
着性及び耐欠損性を示すとともに、優れた耐摩耗性を有
するサーメット製切削工具を提供する。(57) [Summary] [Purpose] The present invention relates to a wear-resistant cermet cutting tool having excellent welding resistance and a method for manufacturing the same. [Structure] The ratio Im / Ic of the strength Im of the carbide, nitride, carbonitride and double carbonitride constituting the hard dispersed phase to the strength Ic of the iron group metal in the X-ray diffraction of the outermost surface layer is within a specific range. In addition, there is a halo pattern derived from the amorphous part, and the maximum hardness in the tool cross section is at a specific depth position from the outermost surface. A method for producing the cermet cutting tool by subjecting a surface of a cermet cutting tool comprising a hard dispersed phase forming component mainly containing a group and an iron group metal component to a chemical treatment or an electrochemical treatment. [Effect] The present invention provides a cermet cutting tool having excellent wear resistance and chipping resistance as well as excellent wear resistance when used for cutting extremely mild steel.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、鋼などの高速切削や
断続切削における高送り・高切込み、そして特に溶着に
よる欠損が発生し易い極軟鋼の軽切削に用いた場合に、
優れた耐欠損性を示すとともに、優れた耐摩耗性を発揮
するサーメット製切削工具に関するものである。BACKGROUND OF THE INVENTION The present invention, when used for high-speed cutting and interrupted cutting of steel and the like, high feed and high depth of cut, and especially for light cutting of ultra-mild steel where defects due to welding easily occur,
The present invention relates to a cermet-made cutting tool which exhibits excellent fracture resistance and exhibits excellent wear resistance.
【０００２】[0002]
【従来の技術】従来、重量％で（以下％は重量％を示
す）、金属成分として鉄族金属のうちの１種以上を５〜
３０％含有し、残りがＴｉＣ、ＴｉＮ、ＴｉＣＮ又は
（ＴｉＭ）（ＣＮ）（但しＭは、Ｔａ、Ｎｂ、Ｖ、Ｚ
ｒ、Ｗ、Ｍｏ、Ｃｒのうちの１種以上）で表される炭化
物、窒化物、炭窒化物又は複合炭窒化物のうち１種以上
からなる硬質分散相形成成分（以下、単に硬質分散相形
成成分という）並びに不可避不純物からなる組成を有す
るサーメット製切削工具において、表層部のしみだし最
表面層が、３０〜９０％の金属成分を含有し、残りが上
記硬質分散相形成成分からなる組成を有する場合に、そ
のサーメット製切削工具が高い耐欠損性を有することが
知られている（例えば特開平４−１４６００６号公
報）。2. Description of the Related Art Conventionally, 5% by weight of one or more of iron group metals is used as a metal component by weight% (hereinafter,% means weight%).
30% content, the rest is TiC, TiN, TiCN or (TiM) (CN) (where M is Ta, Nb, V, Z).
Hard dispersed phase forming component (hereinafter, simply hard dispersed phase) consisting of one or more kinds of carbides, nitrides, carbonitrides or composite carbonitrides represented by r, W, Mo and Cr) In the cermet cutting tool having a composition consisting of (forming component) and unavoidable impurities, the outermost surface exuding layer of the surface layer portion contains 30 to 90% of a metal component, and the balance consists of the hard dispersed phase forming component. It is known that the cermet-made cutting tool has high fracture resistance when it has the following (for example, JP-A-4-146006).
【０００３】[0003]
【発明が解決しようとする課題】前記サーメット製切削
工具は、金属成分と各硬質分散相形成成分の原料を混合
し、焼結させることによって製造されるが、焼結時に金
属成分が焼結体の表面付近に移動し金属成分の割合が多
いしみだし最表面層が形成され、かつ最表面から２〜３
０μｍの位置に内部の硬さの１．１〜１．６倍の硬さを
有する硬化層が形成される。このしみだし最表面層及び
硬化層の発生は、サーメット製切削工具を焼結により製
造する限り、避けることのできない現象であるが、この
しみだし最表面層が形成されるとサーメット製切削工具
の耐摩耗性が低下する。前記組成のサーメット製切削工
具においては、この耐摩耗性の低下は、改善されてはい
るものの未だ不十分であり、しかもこのしみだし最表面
層の存在により軟鋼、極軟鋼等の切削時に、表面の鉄族
金属と切り屑が化学反応を起こし、チップの先端に切り
屑が接着し、面粗度が悪化したり、欠損の原因となるな
どのいわゆる溶着問題は避けることができない。本発明
の目的は、このような従来技術の問題点を解決し、極軟
鋼の切削に用いた場合にも、優れた耐融着性及び耐欠損
性を示すとともに、優れた耐摩耗性を有するサーメット
製切削工具及びその製造方法を提供することにある。The cermet cutting tool is manufactured by mixing the metal components and the raw materials of the hard dispersed phase forming components and sintering the mixture. The outermost surface layer of the exudate, which has a large proportion of metal components and moves to the vicinity of the surface of the
A hardened layer having a hardness of 1.1 to 1.6 times the internal hardness is formed at a position of 0 μm. The occurrence of the exudation outermost surface layer and the hardened layer is an unavoidable phenomenon as long as the cermet cutting tool is manufactured by sintering, but when the exudation outermost surface layer is formed, the cermet cutting tool Abrasion resistance decreases. In the cutting tool made of cermet having the above composition, this decrease in wear resistance is still insufficient although improved, and due to the presence of this exudation outermost surface layer, when cutting mild steel, extremely mild steel, etc., the surface The so-called welding problem that the iron group metal and the chips cause a chemical reaction, the chips adhere to the tip of the chip, the surface roughness deteriorates, and defects occur cannot be avoided. The object of the present invention is to solve the above-mentioned problems of the prior art and, even when used for cutting ultra-soft steel, exhibit excellent fusion resistance and fracture resistance, and also have excellent wear resistance. It is intended to provide a cermet cutting tool and a manufacturing method thereof.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、前記問題
点の解決のため研究を重ねた結果、金属成分の割合の多
いしみだし最表面層に化学処理または電気化学処理を施
して改質することによって、前記耐摩耗性劣化及び溶着
による耐欠損性劣化を防ぐことができるという知見を得
て本発明を完成した。すなわち本発明は、（１）Ｔｉ基
を主とする硬質分散相形成成分と鉄族金属成分とからな
るサーメット製切削工具であって、該サーメット製切削
工具の最表面層のＸ線回折において、回折角２θが４０
度から５０度の範囲での鉄族金属の強度Ｉｃに対する硬
質分散相を構成する炭化物、窒化物、炭窒化物及び複炭
窒化物の強度Ｉｍの比Ｉｍ／Ｉｃが１．１〜３．０の範
囲にあり、かつ回折角２θが２０度から３０度の付近に
ピークを持つハローパターンが存在し、さらに工具断面
における最高硬さが最表面より２〜３０μｍの範囲内の
深さ位置に有り、かつ最高硬さが内部の硬さの１．１倍
から１．６倍の範囲にあることを特徴とする耐溶着性に
優れた耐摩耗性サーメット製切削工具、及び（２）Ｔｉ
系セラミックスの原料と鉄族金属とを焼結させて得られ
るＴｉ基を主とする硬質相形成成分と鉄族金属成分とか
らなるサーメット製切削工具の表面に化学処理または電
気化学的処理を施すことにより、最表面層のＸ線回折に
おいて、回折角２θが４０度から５０度の範囲でのＩｍ
／Ｉｃが１．１〜３．０の範囲にあり、かつ回折角２θ
が２０度から３０度の付近にピークを持つハローパター
ンが存在するようにし、さらに工具断面における最高硬
さが最表面より２〜３０μｍの範囲内の深さ位置に有
り、かつ最高硬さが内部の硬さの１．１倍から１．６倍
の範囲にあるようにすることを特徴とする耐溶着性に優
れた耐摩耗性サーメット製切削工具の製造方法である。As a result of repeated studies for solving the above problems, the inventors of the present invention have modified the bleeding outermost surface layer containing a large proportion of metal components by chemical treatment or electrochemical treatment. The present invention has been completed with the knowledge that the deterioration of wear resistance and the deterioration of fracture resistance due to welding can be prevented by improving the quality. That is, the present invention is (1) a cermet-made cutting tool consisting of a hard dispersed phase forming component mainly composed of a Ti group and an iron group metal component, wherein the X-ray diffraction of the outermost surface layer of the cermet-made cutting tool is: Diffraction angle 2θ is 40
Ratio Im / Ic of strength Im of carbides, nitrides, carbonitrides and double carbonitrides constituting the hard dispersed phase to the strength Ic of the iron group metal in the range of 50 to 50 degrees is 1.1 to 3.0. , And there is a halo pattern having a peak near the diffraction angle 2θ of 20 to 30 degrees, and the maximum hardness in the tool cross section is at a depth position within the range of 2 to 30 μm from the outermost surface. And, the maximum hardness is in the range of 1.1 to 1.6 times the internal hardness, which is a wear-resistant cermet cutting tool with excellent welding resistance, and (2) Ti
The surface of a cermet cutting tool composed of a hard phase forming component mainly composed of a Ti group and an iron group metal component obtained by sintering a raw material of a series ceramics and an iron group metal is subjected to a chemical treatment or an electrochemical treatment. As a result, in X-ray diffraction of the outermost surface layer, Im in the range of the diffraction angle 2θ of 40 degrees to 50 degrees
/ Ic is in the range of 1.1 to 3.0, and the diffraction angle is 2θ.
Has a halo pattern with a peak around 20 to 30 degrees, and the maximum hardness in the tool cross section is at a depth position within the range of 2 to 30 μm from the outermost surface, and the maximum hardness is inside. The hardness is in the range of 1.1 times to 1.6 times the hardness of the above. A method for producing a wear-resistant cermet cutting tool having excellent welding resistance.
【０００５】本発明のサーメット製切削工具は、基本的
には金属成分として鉄族金属（Ｃｏ、Ｎｉ、Ｆｅ）のう
ちの１種以上を５〜３０％含有し、残りがＴｉＣ、Ｔｉ
Ｎ、ＴｉＣＮ又は（ＴｉＭ）（ＣＮ）（但しＭは、Ｔ
ａ、Ｎｂ、Ｖ、Ｚｒ、Ｗ、Ｍｏ、Ｃｒのうちの１種以
上）で表される炭化物、窒化物、炭窒化物又は複合炭窒
化物のうちの１種以上からなる硬質分散相形成成分並び
に不可避不純物からなる組成を有するものである。The cermet cutting tool of the present invention basically contains 5 to 30% of one or more of iron group metals (Co, Ni, Fe) as a metal component, and the rest is TiC, Ti.
N, TiCN or (TiM) (CN) (where M is T
a, Nb, V, Zr, W, Mo, one or more of Cr), a hard dispersed phase forming component composed of one or more of a carbide, a nitride, a carbonitride or a composite carbonitride. In addition, it has a composition of inevitable impurities.
【０００６】このようなサーメット製切削工具は、硬質
分散層形成成分の原料となるＴｉＣ、ＴｉＮ、ＴｉＣ
Ｎ、ＴａＣ、ＴａＮ、ＮｂＣ、ＮｂＮ、ＺｒＣ、Ｚｒ
Ｎ、ＷＣ、Ｍｏ2 Ｃ、ＶＣ、Ｗ、及びこれらの構成成分
を含む炭窒化物及び複炭窒化物などから選ばれる１種以
上の原料粉末に、金属成分を形成する原料となるＣｏ、
Ｎｉ及びＦｅから選ばれる１種以上の鉄族金属あるいは
その化合物の粉末を混合し、焼結させることによって製
造される。Such a cermet cutting tool uses TiC, TiN and TiC which are raw materials for the hard dispersion layer forming component.
N, TaC, TaN, NbC, NbN, ZrC, Zr
N, WC, Mo 2 C, VC, W, and Co serving as a raw material for forming a metal component in one or more raw material powders selected from carbonitrides and double carbonitrides containing these constituents,
It is manufactured by mixing powders of one or more iron group metals selected from Ni and Fe or their compounds and sintering.
【０００７】焼結条件は、使用する原料の種類や組成、
目的とするサーメット製切削工具の大きさ、形状などに
より異なり、それぞれの場合に応じて適宜定めればよい
が、通常１４００〜１５５０℃の温度で、１．０〜２．
０時間程度である。好ましい条件としては、例えば１２
００℃程度まで真空焼結し、１２００〜１５５０℃程度
までを窒素雰囲気下で雰囲気焼結した後、真空下で冷却
する方法を採ることができる。The sintering conditions are the kind and composition of raw materials used,
It depends on the size, shape, etc. of the target cermet cutting tool, and may be appropriately determined depending on each case, but usually at a temperature of 1400 to 1550 ° C. and 1.0 to 2.
It is about 0 hours. Preferred conditions are, for example, 12
It is possible to employ a method in which vacuum sintering is performed to about 00 ° C., atmospheric sintering is performed to 1200 to 1550 ° C. under a nitrogen atmosphere, and then cooling is performed under vacuum.
【０００８】本発明においては、前記のようにして得ら
れたサーメット製切削工具をさらに化学処理または電気
化学処理を施して表面の改質を行うことを特徴とする。
表面処理の方法としては酸による処理が好適である。処
理条件は使用する酸の種類や濃度により異なるが、例え
ば硝酸、硫酸、塩酸あるいはフッ酸などの酸を単独又は
混合した水溶液に浸漬し、２０〜５０℃で５秒〜３０分
間処理を行えばよい。酸の水溶液の濃度としては、濃硝
酸、濃硫酸、濃塩酸などを１〜５容量倍の水で希釈して
用いるのが好ましい。The present invention is characterized in that the cermet cutting tool obtained as described above is further subjected to chemical treatment or electrochemical treatment to modify the surface.
As a surface treatment method, acid treatment is suitable. The treatment conditions vary depending on the type and concentration of the acid used, but for example, by immersing in an aqueous solution of acids such as nitric acid, sulfuric acid, hydrochloric acid or hydrofluoric acid alone or mixed, and treating at 20 to 50 ° C. for 5 seconds to 30 minutes. Good. As the concentration of the aqueous acid solution, it is preferable to use concentrated nitric acid, concentrated sulfuric acid, concentrated hydrochloric acid, etc. diluted with 1 to 5 volumes of water.
【０００９】改質処理の度合いは、表面のＸ線回折測定
により評価し、この測定値が所定の範囲内になるように
改質処理を行うようにする。すなわち、処理後のサーメ
ット製切削工具の最表面層のＸ線回折（管球：Ｃｕ・Ｋ
α、管電圧：４４ｋＶ、管電流：２００ｍＡ）におい
て、回折角２θが４０度から５０度の範囲でのＩｍ／Ｉ
ｃが１．１〜３．０の範囲にあり、かつ回折角２θが２
０度から３０度の付近にピークを持つハローパターン
（Ｘ線回折において明瞭なピークを持たないブロードな
パターン）が存在するようにする。前記のように工具の
最表面にはしみ出し表面層が形成されるが、このしみ出
し表面層は通常約１〜２μｍの厚みで形成され、金属成
分が主体のため内層部に比較して硬度は低くなってい
る。本発明のサーメット製切削工具は、このしみ出し表
面層の部分を改質したものであり、かつ工具断面におけ
る最高硬さが最表面より２〜３０μｍの範囲内の深さ位
置にあり、この最高硬さが内部の硬さの１．１倍から
１．６倍の範囲にあるものである。このようにすること
により、耐溶着性にすぐれた耐摩耗性サーメット製切削
工具を得ることができる。The degree of modification treatment is evaluated by X-ray diffraction measurement of the surface, and the modification treatment is carried out so that the measured value falls within a predetermined range. That is, the X-ray diffraction (tube: Cu · K) of the outermost surface layer of the cermet cutting tool after the treatment.
α, tube voltage: 44 kV, tube current: 200 mA), Im / I in the diffraction angle 2θ range of 40 to 50 degrees
c is in the range of 1.1 to 3.0, and the diffraction angle 2θ is 2
A halo pattern having a peak in the vicinity of 0 to 30 degrees (a broad pattern having no clear peak in X-ray diffraction) is made to exist. As described above, a bleeding surface layer is formed on the outermost surface of the tool, and this bleeding surface layer is usually formed with a thickness of about 1 to 2 μm, and since the metal component is the main component, the hardness is higher than that of the inner layer portion. Is low. The cermet cutting tool of the present invention is obtained by modifying this portion of the bleeding surface layer, and the maximum hardness in the tool cross section is at a depth position within the range of 2 to 30 μm from the outermost surface. The hardness is 1.1 to 1.6 times the internal hardness. By doing so, it is possible to obtain a wear-resistant cermet cutting tool having excellent welding resistance.
【００１０】次に、本発明のサーメット製切削工具にお
いて、数値条件を前記の通りに限定した理由を説明す
る。 （ａ）Ｘ線回折の強度比（Ｉｍ／Ｉｃ）とハローパター
ン この強度比（Ｉｍ／Ｉｃ）は、表面における金属成分と
硬質分散相形成成分の比率と相関性があり、耐溶着性に
影響を与えるものである。その比が１．１未満では表面
の鉄族金属が多くなり所望の耐溶着性が得られず、また
３．０を越えると靱性が低下し、所望の靱性が確保でき
なくなる恐れがあるので、その強度比を１．１から３．
０と定めた。また、回折角２θが２０度から３０度の付
近にピークを持つハローパターンは改質処理により表面
に形成された非晶質物質を表すものであり、この非晶質
物質の形成は耐溶着性の向上に効果がある。本発明のサ
ーメット製切削工具の１例についてＸ線回折測定を行っ
たチャート図を図１及び図２に示す。図中のＭＫは（Ｔ
ｉ、Ｔａ、Ｎｂ、Ｗ）（ＣＮ）を表し、ＣｏＮｉはＣｏ
及びＮｉの固溶金属（Ｃｏ＋Ｎｉ）を表す。Next, the reason for limiting the numerical conditions as described above in the cermet cutting tool of the present invention will be described. (A) X-ray diffraction intensity ratio (Im / Ic) and halo pattern This intensity ratio (Im / Ic) has a correlation with the ratio of the metal component to the hard dispersed phase forming component on the surface and affects the welding resistance. Is to give. If the ratio is less than 1.1, the amount of iron group metal on the surface is large and the desired welding resistance cannot be obtained, and if it exceeds 3.0, the toughness may decrease and the desired toughness may not be ensured. The intensity ratio is 1.1 to 3.
It was set to 0. Further, the halo pattern having a peak in the vicinity of the diffraction angle 2θ of 20 ° to 30 ° represents an amorphous substance formed on the surface by the modification treatment, and the formation of this amorphous substance is resistant to welding. Is effective in improving. An X-ray diffraction measurement chart of one example of the cermet cutting tool of the present invention is shown in FIGS. 1 and 2. MK in the figure is (T
i, Ta, Nb, W) (CN), and CoNi is Co
And a solid solution metal of Ni (Co + Ni).
【００１１】（ｂ）最高硬さの深さ位置 最高硬さの深さ位置が２μｍより浅いところに存在する
場合、所望の耐欠損性を確保することができず、逆にそ
の深さ位置が３０μｍを越えて深くなる場合、表面硬質
層による耐摩耗性の向上が確保できなくなり、切削性能
が低下するようになることから、その深さ位置の範囲を
２〜３０μｍと定めた。 （ｃ）最高硬さ 最高硬さが工具表面より１ｍｍの深さでの硬さの１．１
倍未満であった場合、所望の耐摩耗性が得られず、逆に
１．６倍を越えた場合工具表面近傍での靱性がなくな
り、耐欠損性が失われることからその最高硬さを工具表
面より１ｍｍの深さでの硬さの１．１倍から１．６倍と
定めた。(B) Depth position of maximum hardness When the depth position of the maximum hardness exists at a position shallower than 2 μm, desired fracture resistance cannot be ensured, and conversely the depth position is When the depth is more than 30 μm, the improvement of wear resistance due to the hard surface layer cannot be ensured and the cutting performance is deteriorated. Therefore, the range of the depth position is set to 2 to 30 μm. (C) Maximum hardness The maximum hardness is 1.1 of the hardness at a depth of 1 mm from the tool surface.
If it is less than double, the desired wear resistance cannot be obtained. Conversely, if it exceeds 1.6 times, the toughness near the tool surface is lost and the fracture resistance is lost. The hardness was determined to be 1.1 to 1.6 times the hardness at a depth of 1 mm from the surface.
【００１２】[0012]
【実施例】以下実施例により本発明をさらに具体的に説
明する。 （実施例１）原料粉末として、いずれも１．０〜２．５
μｍの範囲内の平均粒径を有する、ＴｉＣＮ（ＴｉＮ＝
５０／５０）、ＴｉＣ、ＴｉＮ、ＴａＣ、ＮｂＣ、Ｗ
Ｃ、Ｍｏ2 Ｃ、ＶＣ、Ｃｏ及びＮｉの各粉末を用意し、
これら原料粉末をそれぞれ表１に示される配合組成に配
合し、ボールミルにて湿式混合し、乾燥した後、１．０
ｔｏｎ／ｃｍ2 の圧力でプレス成形することにより圧粉
体を成形し、ついでこの圧粉体を表１に示される焼結条
件で窒素雰囲気下で焼結し焼結体を得た。この焼結体を
表２に示す割合で水で希釈した硝酸中に浸漬し、３７℃
で５〜７分間保持することにより酸処理して表面改質を
行い、ＩＳＯ規格ＣＮＭＧ１２０４０８の形状を有す
る、試料番号１〜１０の本発明のサーメット製切削工具
を得た。また、比較のため酸処理を行っていない焼結体
のままのサーメット製切削工具１１〜１６を製造した。The present invention will be described in more detail with reference to the following examples. (Example 1) 1.0 to 2.5 as raw material powder
TiCN (TiN = having an average particle size in the range of μm)
50/50), TiC, TiN, TaC, NbC, W
Prepare powders of C, Mo 2 C, VC, Co and Ni,
Each of these raw material powders was blended to the blending composition shown in Table 1, wet-mixed in a ball mill and dried, and then 1.0
A green compact was molded by press molding at a pressure of ton / cm 2 , and then this green compact was sintered under a nitrogen atmosphere under the sintering conditions shown in Table 1 to obtain a sintered body. This sintered body was dipped in nitric acid diluted with water at the ratio shown in Table 2 to 37 ° C.
The surface was modified by acid treatment by holding it for 5 to 7 minutes to obtain a cermet cutting tool of the present invention of sample numbers 1 to 10 having a shape of ISO standard CNMG120408. Further, for comparison, cermet cutting tools 11 to 16 which were as-sintered without acid treatment were manufactured.
【００１３】これらのサーメット製切削工具の試料につ
いて、Ｘ線回折測定を行い、回折角２θが４０度から５
０度の範囲でのＩｍ／Ｉｃの値及び回折角２θが２０度
から３０度の付近にピークを持つハローパターンの有無
を調べた。さらに、試料の最高硬さ（Ｈ1 ）及び表面か
ら１ｍｍの位置での硬さ（Ｈ2 ）を測定した。これらの
結果を表２に示す。X-ray diffraction measurement was performed on the samples of these cermet cutting tools, and the diffraction angle 2θ was from 40 degrees to 5 degrees.
The value of Im / Ic in the range of 0 degree and the presence or absence of a halo pattern having a peak in the vicinity of the diffraction angle 2θ of 20 degrees to 30 degrees were examined. Further, the maximum hardness (H 1 ) of the sample and the hardness (H 2 ) at a position 1 mm from the surface were measured. The results are shown in Table 2.
【００１４】[0014]
【表１】 [Table 1]
【００１５】次にこれらのサーメット製切削工具を用
い、 被削材 ：ＳＣＭ４３５ 切削速度 ：２００(m/min) 送り ：０．３(mm/rev) 切込み ：２．０(mm) 切削時間 ：２０(min) の条件で高速切削を行い、切れ刃の逃げ面摩耗幅を測定
し、耐摩耗性を調べ、さらに、 被削材 ：ＳＣＭ４３５（４条の溝入り材） 切削速度 ：１００(m/min) 送り ：０．２(mm/rev) 切込み ：２．０(mm) 切削時間 ：３０sec の条件で断続切削を行い、１０本の試験切れ刃に対する
欠損発生切れ刃の欠損割合を測定し、耐欠損性を調べそ
れらの結果を表２に示した。Next, using these cermet cutting tools, the material to be cut: SCM435 Cutting speed: 200 (m / min) Feed: 0.3 (mm / rev) Depth of cut: 2.0 (mm) Cutting time: 20 High-speed cutting is performed under the condition of (min), the flank wear width of the cutting edge is measured, the wear resistance is checked, and the work material: SCM435 (4 grooved material) Cutting speed: 100 (m / m min) Feed: 0.2 (mm / rev) Depth of cut: 2.0 (mm) Intermittent cutting was performed under the conditions of cutting time: 30 sec, and the defect ratio of the defect occurrence cutting edge to the 10 test cutting edges was measured, The fracture resistance was examined and the results are shown in Table 2.
【００１６】[0016]
【表２】 [Table 2]
【００１７】これらの結果から、最表面層のＸ線回折に
おいて、回折角２θが４０度から５０度の範囲でのＩｍ
／Ｉｃが１．１〜３．０の範囲にあり、かつ２０度から
３０度の付近にピークを持つハローパターンが存在し、
かつ工具断面における最高硬さが最表面より２〜３０μ
ｍの範囲内の深さ位置にあり、この最高硬さが内部の硬
さの１．１倍から１．６倍の範囲にある本発明のサーメ
ット製切削工具は、耐溶着性の向上により耐欠損性が優
れ、耐摩耗性が優れたサーメット製切削工具であること
がわかる。From these results, in X-ray diffraction of the outermost surface layer, Im in the range of the diffraction angle 2θ of 40 ° to 50 °
/ Ic is in the range of 1.1 to 3.0, and there is a halo pattern having a peak in the vicinity of 20 to 30 degrees,
And the maximum hardness in the tool cross section is 2 to 30μ from the outermost surface
The cermet cutting tool of the present invention, which is located at a depth position within the range of m and whose maximum hardness is in the range of 1.1 to 1.6 times the internal hardness, has improved resistance to welding and thus has improved resistance to welding. It can be seen that this is a cermet cutting tool with excellent chipping property and excellent wear resistance.
【００１８】[0018]
【発明の効果】本発明のサーメット製切削工具は、極軟
鋼の切削に用いた場合にも、優れた耐融着性及び耐欠損
性を示すとともに、優れた耐摩耗性を有するサーメット
製切削工具である。また本発明の方法によれば、前記特
性を有するサーメット製切削工具を容易に製造すること
ができる。EFFECTS OF THE INVENTION The cermet cutting tool of the present invention exhibits excellent fusion resistance and fracture resistance even when used for cutting extremely mild steel, and also has excellent wear resistance. Is. According to the method of the present invention, a cermet cutting tool having the above characteristics can be easily manufactured.
【図１】本発明のサーメット製切削工具の１例について
Ｘ線回折測定を行った結果のチャート図である。FIG. 1 is a chart showing the results of X-ray diffraction measurement performed on an example of a cermet cutting tool of the present invention.
【図２】図１のチャート図の部分拡大図である。FIG. 2 is a partially enlarged view of the chart of FIG.
Claims (2)
鉄族金属成分とからなるサーメット製切削工具であっ
て、該サーメット製切削工具の最表面層のＸ線回折にお
いて、回折角２θが４０度から５０度の範囲での鉄族金
属の強度Ｉｃに対する硬質分散相を構成する炭化物、窒
化物、炭窒化物及び複炭窒化物の強度Ｉｍの比Ｉｍ／Ｉ
ｃが１．１〜３．０の範囲にあり、かつ回折角２θが２
０度から３０度の付近にピークを持つハローパターンが
存在し、さらに工具断面における最高硬さが最表面より
２〜３０μｍの範囲内の深さ位置に有り、かつ最高硬さ
が内部の硬さの１．１倍から１．６倍の範囲にあること
を特徴とする耐溶着性に優れた耐摩耗性サーメット製切
削工具。1. A cermet cutting tool comprising a hard dispersed phase forming component mainly containing Ti group and an iron group metal component, wherein an outermost surface layer of the cermet cutting tool has a diffraction angle of 2θ in X-ray diffraction. Ratio Im / I of the strength Im of the carbide, nitride, carbonitride and double carbonitride constituting the hard dispersed phase to the strength Ic of the iron group metal in the range of 40 to 50 degrees.
c is in the range of 1.1 to 3.0, and the diffraction angle 2θ is 2
There is a halo pattern with a peak in the vicinity of 0 to 30 degrees, and the maximum hardness in the tool cross section is at a depth position within the range of 2 to 30 μm from the outermost surface, and the maximum hardness is the internal hardness. The wear resistance cermet cutting tool with excellent welding resistance is characterized by being in the range of 1.1 times to 1.6 times.
を焼結させて得られるＴｉ基を主とする硬質相形成成分
と鉄族金属成分とからなるサーメット製切削工具の表面
に化学処理または電気化学的処理を施すことにより、最
表面層のＸ線回折において、回折角２θが４０度から５
０度の範囲での鉄族金属の強度Ｉｃに対する硬質分散相
を構成する炭化物、窒化物、炭窒化物及び複炭窒化物の
強度Ｉｍの比Ｉｍ／Ｉｃが１．１〜３．０の範囲にあ
り、かつ回折角２θが２０度から３０度の付近にピーク
を持つハローパターンが存在し、さらに工具断面におけ
る最高硬さが最表面より２〜３０μｍの範囲内の深さ位
置に有り、かつ最高硬さが内部の硬さの１．１倍から
１．６倍の範囲にあるようにすることを特徴とする耐溶
着性に優れた耐摩耗性サーメット製切削工具の製造方
法。2. A surface of a cutting tool made of cermet, which comprises a hard phase forming component mainly composed of Ti group obtained by sintering a raw material of Ti-based ceramics and an iron group metal and an iron group metal component, is chemically treated or By performing the electrochemical treatment, the X-ray diffraction of the outermost surface layer has a diffraction angle 2θ of 40 degrees to 5 degrees.
The ratio Im / Ic of the strength Im of the carbide, nitride, carbonitride and double carbonitride constituting the hard dispersed phase to the strength Ic of the iron group metal in the range of 0 degree is in the range of 1.1 to 3.0. And a halo pattern having a peak near a diffraction angle 2θ of 20 to 30 degrees is present, and the maximum hardness in the tool cross section is at a depth position within the range of 2 to 30 μm from the outermost surface, and A method for producing a wear-resistant cermet cutting tool with excellent welding resistance, characterized in that the maximum hardness is in the range of 1.1 to 1.6 times the internal hardness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23982993A JPH0796407A (en) | 1993-09-27 | 1993-09-27 | Abrasion resistant cermet cutting tool and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23982993A JPH0796407A (en) | 1993-09-27 | 1993-09-27 | Abrasion resistant cermet cutting tool and method of manufacturing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0796407A true JPH0796407A (en) | 1995-04-11 |
Family
ID=17050478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23982993A Pending JPH0796407A (en) | 1993-09-27 | 1993-09-27 | Abrasion resistant cermet cutting tool and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0796407A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010035824A1 (en) * | 2008-09-26 | 2010-04-01 | 京セラ株式会社 | Sintered cermet and cutting tool |
-
1993
- 1993-09-27 JP JP23982993A patent/JPH0796407A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010035824A1 (en) * | 2008-09-26 | 2010-04-01 | 京セラ株式会社 | Sintered cermet and cutting tool |
| US9074270B2 (en) | 2008-09-26 | 2015-07-07 | Kyocera Corporation | Sintered cermet and cutting tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE3688999T2 (en) | Sintered carbide body for tools. | |
| DE19546357C2 (en) | Hard coating with excellent abrasion resistance for substrate coating | |
| KR20040085050A (en) | Sintered alloy having radient composition and method of producing the same | |
| EP1803830A1 (en) | Cemented carbides | |
| JP7824973B2 (en) | cutting tools | |
| DE60300927T2 (en) | Coated cutting tool | |
| JPH02254131A (en) | Nitrogen-containing cermet having excellent various characteristics, its manufacture and coated nitrogen-containing cermet | |
| DE102012111728B4 (en) | Cutting tool and method for producing a cutting tool | |
| JP2004315904A (en) | Fine-grain cemented carbide | |
| EP0687744A2 (en) | Nitrogen-containing sintered hard alloy | |
| KR890004539B1 (en) | Super heat-sintered small alloy and its manufacturing method | |
| DE69809555T2 (en) | TITANIUM-BASED CARBON NITRIDE ALLOY WITH NITRATED SURFACE ZONE | |
| DE10297020T5 (en) | Multi-component ceramic powder, method for producing multi-component ceramic powder, sintered body and method for producing a sintered body | |
| KR20230043854A (en) | Cubic boron nitride sintered body and cutting tool containing the same | |
| JP3430737B2 (en) | Ti-based carbonitride cermet with high strength | |
| JPH0796407A (en) | Abrasion resistant cermet cutting tool and method of manufacturing the same | |
| JP2893886B2 (en) | Composite hard alloy material | |
| JPH0698540B2 (en) | Method for manufacturing a cutting tool made of thermite with excellent wear resistance | |
| JPS6152102B2 (en) | ||
| JPH10146702A (en) | Throwaway-type cutting insert made of titanium carbonitride-based cermet with excellent wear and chipping resistance | |
| JPH0665671A (en) | Cemented carbide for cutting tool | |
| JPH0276606A (en) | Cutting tool made of high abrasion-resistant titanium carbide-nitride radical cermet | |
| JPH10324942A (en) | Ultra-fine cemented carbide, and its manufacture | |
| JP3976285B2 (en) | Cermet tool having a hard nitrided layer and method for producing the same | |
| JPH0530881B2 (en) |