JPH0446674A - Method for cladding by welding with build-up material to engine valve or the like - Google Patents
Method for cladding by welding with build-up material to engine valve or the likeInfo
- Publication number
- JPH0446674A JPH0446674A JP15278390A JP15278390A JPH0446674A JP H0446674 A JPH0446674 A JP H0446674A JP 15278390 A JP15278390 A JP 15278390A JP 15278390 A JP15278390 A JP 15278390A JP H0446674 A JPH0446674 A JP H0446674A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- overlay
- engine valve
- torch
- valve
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 38
- 239000000463 material Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims description 21
- 238000005253 cladding Methods 0.000 title abstract 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000007769 metal material Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000010953 base metal Substances 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 5
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 17
- 239000002131 composite material Substances 0.000 description 17
- 229910001347 Stellite Inorganic materials 0.000 description 15
- 239000000843 powder Substances 0.000 description 9
- 239000011651 chromium Substances 0.000 description 8
- 229910052804 chromium Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910003470 tongbaite Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- -1 T a C Chemical class 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- MRMOZBOQVYRSEM-UHFFFAOYSA-N tetraethyllead Chemical compound CC[Pb](CC)(CC)CC MRMOZBOQVYRSEM-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- LNSPFAOULBTYBI-UHFFFAOYSA-N [O].C#C Chemical group [O].C#C LNSPFAOULBTYBI-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は１例えばエンジンバルブの弁フェース部やバル
ブシートのシート部等に、硬質かつ高耐摩耗性を有する
盛金材料を肉盛溶接する方法に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to 1) overlaying and welding a hard and highly wear-resistant overlay material onto, for example, the valve face portion of an engine valve or the seat portion of a valve seat. Regarding the method.
内燃機関用のエンジンバルブの弁フェース部やバルブシ
ートのシート部は、高負荷、高サイクルの繰返し荷重を
受けるため、耐熱鋼等の母材単体では、高温強度や高温
耐食性、耐摩耗性等に問題が生じる。The valve faces and valve seats of engine valves for internal combustion engines are subjected to high loads and repeated loads, so the base material alone, such as heat-resistant steel, has poor high-temperature strength, high-temperature corrosion resistance, wear resistance, etc. A problem arises.
そのため、上記弁フェース部やシート部に、高温強度や
耐摩耗性等に優れるステライト等の盛金材料を肉盛溶接
して、高温特性を向上させている。Therefore, a metal material such as stellite, which has excellent high-temperature strength and abrasion resistance, is overlay-welded to the valve face and seat to improve high-temperature characteristics.
このような肉盛溶接は、通常、第４図に示すようなプラ
ズマ溶接装置を用いて行なわれる。Such overlay welding is normally performed using a plasma welding device as shown in FIG.
すなわち、はぼ３０°傾斜させた回転台（１）上に、エ
ンジンバルブ（２）の傘部（２ａ）を載置して、一定方
向に回転させつつ、弁フェース部（２ｂ）の直上に臨ま
せたトーチ（３）の先端よりプラズマアーク（４）を発
生させ、かつ同時に、トーチ（３）の先端のノズルより
、粉末状のステライト（５）を供給し、アーク熱により
ステライト（５）と弁フェース部（２ｂ）の表層とを溶
融させながら、傘部（２ａ）を１周させると、弁フェー
ス部（２ｂ）の全周に肉盛り（６）が施される。That is, the umbrella part (2a) of the engine valve (2) is placed on a rotary table (1) tilted at approximately 30 degrees, and while being rotated in a constant direction, the head part (2a) is placed directly above the valve face part (2b). A plasma arc (4) is generated from the tip of the torch (3), and at the same time, powdered stellite (5) is supplied from the nozzle at the tip of the torch (3), and the stellite (5) is heated by the arc. When the umbrella part (2a) is rotated once while melting the surface layer of the valve face part (2b), the build-up (6) is applied to the entire circumference of the valve face part (2b).
最近の自動車用エンジンは、過給機を装着したり、多弁
機構を採用するなど、高速、高回転、高負荷及び高出力
化の傾向にあり、かつ排気ガス清浄化の観点から、弁フ
ェース部等に潤滑効果のある物質（例えば四エチル鉛等
）を含まない燃料が使用される傾向にある。Recent automobile engines tend to be higher speeds, higher rotations, higher loads, and higher outputs, such as by being equipped with superchargers or adopting multi-valve mechanisms. There is a tendency to use fuels that do not contain substances that have a lubricating effect (such as tetraethyl lead).
また、ディーゼルエンジンにおいては、使用される燃料
の点から、優れた耐食性、耐酸化性が要求される。Furthermore, diesel engines are required to have excellent corrosion resistance and oxidation resistance due to the fuel used.
このようなエンジンに用いられるエンジンバルブやバル
ブシートには、高温強度や高温耐食性などの優れた高温
特性、並びに高い耐摩耗性が要求されるが、上記ステラ
イト単体の盛金材料を、エンジンバルブの弁フェース部
やバルブシートのシート部に肉感溶接したのみでは、要
求される十分な高温特性や耐摩耗性等を得ることが難し
い。Engine valves and valve seats used in such engines are required to have excellent high-temperature properties such as high-temperature strength and high-temperature corrosion resistance, as well as high wear resistance. It is difficult to obtain sufficient high-temperature characteristics, wear resistance, etc. required by only feel welding to the valve face portion or the seat portion of the valve seat.
そこで本願出願人は、上記ステライトに代わる高耐摩耗
性を有する盛金材料を開発し、平成２年５月３０日に出
願している（特願平 −号）。Therefore, the applicant of the present application has developed a metal filling material having high wear resistance to replace the above-mentioned stellite, and filed an application on May 30, 1990 (Patent Application No. 1990).
これは、ステライトの粉末をベースとし、これに例えば
炭化物系の高硬度、高融点の粉末を添加した複合盛金材
料であり、炭化物系の粉末の割合が増加するにしたがっ
て、肉盛部の硬度は比例的に高まる特性を有するが、次
のような問題を生じることがある。This is a composite overlay material that is based on stellite powder and to which is added, for example, carbide-based powder with high hardness and high melting point.As the proportion of carbide-based powder increases, the hardness of the overlay part increases. Although it has the property of increasing proportionately, it may cause the following problems.
すなわち、上記複合盛金材料を、上述した従来のステラ
イト単体と同様に、単に弁フエ−２、部（２ｂ）を１回
転させて肉盛溶接したのみでは、炭化物系の粉末の添加
割合がある一定量を越えると、炭化物の溶は残る割合が
増えて、ピンホール、未溶着等の内部欠陥が発生したり
、組織が不安定となったり、冷却収縮時において肉盛部
に割れが生じたりするなど、不良品の発生率が高くなる
。In other words, if the above-mentioned composite overlay material is overlay-welded by simply turning the valve face 2, part (2b) once in the same manner as the conventional stellite alone, the proportion of carbide-based powder added will be high. If the amount exceeds a certain amount, the proportion of carbide remaining will increase, causing internal defects such as pinholes and unwelded parts, making the structure unstable, and causing cracks in the built-up part during cooling shrinkage. As a result, the incidence of defective products increases.
従って、上記諸問題の発生するのを防止して、品質の安
定した肉感部を形成するためには、添加される炭化物等
の上限値を低く抑える必要があるが、このようにすると
、要求される十分な硬度及び耐摩耗性が得られなくなる
ことがある。Therefore, in order to prevent the above problems from occurring and form fleshy parts with stable quality, it is necessary to keep the upper limit of added carbide, etc. low. It may not be possible to obtain sufficient hardness and wear resistance.
本発明は、上記課題に鑑みてなされたもので、その目的
とするところは、硬質かつ高耐摩耗性を有する盛合材料
、例えばステライトと炭化物系の粉末との混合物からな
る複合盛金材料の溶融性。The present invention has been made in view of the above-mentioned problems, and its object is to melt a composite metal material made of a mixture of stellite and carbide powder, such as a metal metal material having hardness and high wear resistance. sex.
溶着性を向上させることにより、炭化物等の添加可能な
限界値を高め、もって、硬質かつ耐摩耗性等に優れる肉
盛り部が形成されるようにした、エンジンバルブ等への
盛金材料の肉盛溶接方法を提供することにある。By improving welding properties, we have increased the limit value of carbide, etc. that can be added, thereby forming a build-up part that is hard and has excellent wear resistance. The object of the present invention is to provide a welding method.
上記目的は、エンジンバルブの弁フェース部等に、母材
と異なる盛金材料を肉盛溶接するに際し、前記弁フェー
ス部に盛金材料を肉感溶接したのち、肉盛り部を加熱手
段により加熱再溶融することにより達成することができ
る。The above purpose is to weld a metal material different from the base material to the valve face of an engine valve by welding the metal material to the valve face, and then reheating the metal material using a heating means. This can be achieved by melting.
より具体的には、エンジンバルブ等を一定方向に回転さ
せつつ、第１周目において、適宜の肉盛溶接装置におけ
るトーチに盛金材料を供給して、エンジンバルブ等の弁
フェース部の全周に肉盛溶接したのち、第２周目におい
て、盛金材料の供給を停止して、前記トーチにより肉盛
り部を加熱再溶融させてもよく、又はエンジンバルブ等
を一定方向に回転させつつ、少なくとも２つのトーチを
備える適宜の肉盛溶接装置における一方のトーチに盛金
材料を供給して、エンジンバルブ等の弁フェース部に肉
盛溶接しつつ、肉盛溶接装置における他方のトーチによ
り、肉盛り部を順次加熱再溶融させてもよい。More specifically, while rotating the engine valve, etc. in a fixed direction, in the first round, the overlay material is supplied to the torch of an appropriate overlay welding device, and the entire circumference of the valve face of the engine valve, etc. is supplied. After overlay welding, in the second round, the supply of the overlay material may be stopped and the overlay part may be heated and remelted by the torch, or while the engine valve etc. is rotated in a certain direction, In an appropriate overlay welding device equipped with at least two torches, the overlay material is supplied to one torch and overlay welded to the valve face of an engine valve, etc., while the other torch in the overlay welding device performs overlay welding. The raised portions may be sequentially heated and remelted.
各請求項に記載の方法において、肉盛溶接後に肉盛り部
を加熱再溶融すると１例えば盛金材料をステライトと炭
化物系の粉末とからなる複合盛金材料とした際において
、炭化物系の粉末の溶融性及び母材との溶着性が高まる
。In the method described in each claim, when the overlay part is heated and remelted after overlay welding, 1. For example, when the overlay material is a composite overlay material consisting of stellite and carbide powder, the carbide powder Improves meltability and weldability with the base material.
また、加熱再溶融すると、ピンホール等の内部欠陥が防
止されるとともに、徐冷作用により、熱ひずみや残留応
力の生じるのが防止される。Furthermore, heating and remelting prevents internal defects such as pinholes, and the slow cooling action prevents thermal strain and residual stress from occurring.
次表は、−船釣な盛金材料として知られている粉末状の
ステライトの組成を示し、本発明方法の実施に供される
複合盛金材料は、このステライトをベース材とし、これ
に、−例として炭化クロム（Ｃｒ、Ｃ２）の粉末を添加
混合したものである。The following table shows the composition of powdered stellite, which is known as a boat-shaped metal material, and the composite metal material used for carrying out the method of the present invention uses this stellite as a base material, and includes: - For example, chromium carbide (Cr, C2) powder is added and mixed.
（以下余白）
ｗｔ％
第１図（Ａ）及び（Ｂ）は、請求項（１）及び（２）記
載の発明の溶接要領を略示するものである。(Hereinafter, blank space) wt% Figures 1 (A) and (B) schematically illustrate the welding procedure of the invention described in claims (1) and (2).
なお、この発明に用いるプラズマ溶接装置は、前述の従
来例と同じであるので、同一の部材には同じ符号を付し
て説明する。The plasma welding apparatus used in the present invention is the same as the conventional example described above, so the same members will be described with the same reference numerals.
まず、第１図（Ａ）に示すように、回転台（１）に載置
したエンジンバルブ（２）を、回転台（１）を回転する
ことにより、一定方向に回転させつつ、弁フェース部（
２ｂ）の直上に臨ませたトーチ（３）の先端より、プラ
ズマアーク（４）を発生させるとともに、不活性シール
ドガス（図示略）を噴射し、かつ同時に、上記複合盛金
材料（７）を、プラズマアーク（４）に向けて供給し、
エンジンバルブ（２）が１周する間に、アーク熱により
溶融させられた複合盛金材料（７）を、弁フェース部（
２ｂ）の全周に肉盛り（６）を施す。First, as shown in Fig. 1 (A), the engine valve (2) placed on the rotary table (1) is rotated in a fixed direction by rotating the rotary table (1), and the valve face part is rotated. (
A plasma arc (4) is generated from the tip of the torch (3) facing directly above 2b), and an inert shielding gas (not shown) is injected, and at the same time, the composite metal material (7) is , supplied towards the plasma arc (4),
While the engine valve (2) makes one revolution, the composite metal material (7) melted by arc heat is applied to the valve face (
Apply overlay (6) around the entire circumference of 2b).
ついで、第１図（Ｂ）に示すように、弁フェース部（２
ｂ）の全周に肉盛り（６）を施した直後において、複合
盛金材料（７）の供給を停止し、かつトーチ（３）の先
端より引き続きプラズマアーク（４）のみを発生させて
、弁フェース部（２ｂ）を、肉盛り（６）部が再溶融し
うる程度まで局部的に加熱しつつ、エンジンバルブ（２
）をさらに１回転させる。Next, as shown in FIG. 1(B), the valve face part (2
Immediately after applying the overlay (6) around the entire circumference of b), the supply of the composite overlay material (7) is stopped, and only the plasma arc (4) continues to be generated from the tip of the torch (3), The engine valve (2b) is heated while locally heating the valve face (2b) to the extent that the built-up (6) part can be remelted.
) one more rotation.
このように、第１周目で通常の肉盛りを行ない、第２周
目で肉盛り部を加熱再溶融すると、ピンホールや未溶着
等の内部欠陥が防止されるとともに、徐冷作用により、
熱ひずみや残留応力の発生するのが防止されるため、冷
却収縮時において盛余部が割れるなど、不良品の発生す
る割合が極めて少なくなる。In this way, by performing normal build-up in the first round and heating and remelting the built-up part in the second round, internal defects such as pinholes and unwelded parts are prevented, and due to the gradual cooling effect,
Since thermal strain and residual stress are prevented from occurring, the rate of defective products such as cracking of the excess portion during cooling shrinkage is extremely reduced.
第３図は、ステライトをベース材として、これに、Ｃｒ
、Ｃ，の添加量を適宜に変えて混合した複合盛金材料を
、上記した肉盛方法により、弁フェース部（２ｂ）に肉
盛りし、その硬度、及び肉盛り部に割れが発生するＣｒ
、Ｃ，の添加上限値を、従来と比較して調査した結果を
示すものである。Figure 3 shows Stellite as a base material and Cr.
, C, mixed with appropriate amounts of added Cr, is overlaid on the valve face part (2b) by the above-mentioned overlay method.
, C, are compared with conventional values.
なお、エンジンバルブ（２）の材料には、マルテンサイ
ト系の耐熱鋼（ＳＵＨ３）を用いた。Note that martensitic heat-resistant steel (SUH3) was used as the material for the engine valve (2).
第３図より明らかなように、Ｃｒ５Ｃｚの添加量を増加
させると、析出炭化物の占める割合が増加することから
、硬度は、はぼ比例的に高まる。As is clear from FIG. 3, when the amount of Cr5Cz added increases, the proportion occupied by precipitated carbides increases, so the hardness increases almost proportionally.
また、従来の１同感工法では、０ｒ３Ｃ２の添加量が２
５％を越えるあたりから肉盛り部に割れが発生するのに
対し、上記した本発明の肉盛り方法においては、肉盛り
部に割れが発生するＣｒ、Ｃ，の添加量は、４５％付近
と大幅に高まっているのが判る。In addition, in the conventional 1-same construction method, the amount of 0r3C2 added is 2
Cracks occur in the build-up area when the build-up area exceeds 5%, whereas in the build-up method of the present invention described above, the amount of added Cr, C, at which cracks occur in the build-up area, is around 45%. It appears that it has increased significantly.
このことは、Ｃｒ、Ｃ，の添加量４５％付近でも、肉盛
り部の組織が安定していることを示し、また。This shows that the structure of the built-up part is stable even when the amount of Cr and C added is around 45%.
添加量の上限値が高くなった分だけ、肉盛り部の硬度が
増すため、高い耐摩耗性を有するようになる。As the upper limit of the amount added increases, the hardness of the built-up portion increases, resulting in high wear resistance.
次に、請求項（１）及び（３）記載の発明の溶接要領を
、第２図に基づいて説明する。Next, welding procedures according to the invention as claimed in claims (1) and (3) will be explained based on FIG. 2.
この発明は、前述した溶接要領と同様の肉盛り用のトー
チ（３）と、その反対側に、はぼ１８０°位置をずらし
て設けた再溶−融（加熱）用のトーチ（８）との２トー
チにより、肉盛溶接を行なうものである。This invention consists of a welding torch (3) similar to the welding procedure described above, and a remelting (heating) torch (8) provided on the opposite side at a position shifted by approximately 180 degrees. Overlay welding is performed using two torches.
すなわち、まず前述した発明と同様に１回転台（１）に
よりエンジンバルブ（２）を一定方向に回転させつつ、
トーチ（３）の先端よりプラズマアーク（４）を発生さ
せ、かつ同時に、複合盛会材料（７）を供給して、弁フ
ェース部（２ｂ）に肉盛り（６）を施す。That is, first, as in the invention described above, while rotating the engine valve (2) in a fixed direction using the one-turn table (1),
A plasma arc (4) is generated from the tip of the torch (3), and at the same time, a composite build-up material (7) is supplied to apply build-up (6) to the valve face portion (2b).
ついで、エンジンバルブ（２）が約半回転して、最初の
肉盛り（６）部の先端が、再溶融用のトーチ（８）の直
下まで移動したとき、トーチ（８）の先端よりプラズマ
アーク（９）のみを発生させ、順次肉盛り（６）されて
回転してくる弁フェース部（２ｂ）を。Then, when the engine valve (2) rotates about half a turn and the tip of the first build-up (6) moves to just below the remelting torch (8), a plasma arc is emitted from the tip of the torch (8). (9) only, and the valve face part (2b) is sequentially built up (6) and rotated.
肉盛り（６）部が再溶融しうる程度まで加熱する。Heat until the overlay (6) part can be remelted.
ついで、エンジンバルブ（２）が１回転して、弁フェー
ス部（２ｂ）の全周に肉盛り（６）が施されたと同時に
、トーチ（３）よりのプラズマアーク（４）と、複合盛
金材料（７）の供給を停止し、かつＩ・−チ（８）によ
り、引き続き肉盛り（６）部を再溶融させる。Next, the engine valve (2) rotates once, and at the same time the overlay (6) is applied to the entire circumference of the valve face (2b), the plasma arc (4) from the torch (3) and the composite overlay are applied. The supply of the material (7) is stopped, and the overlay (6) is subsequently remelted by the I-chi (8).
エンジンバルブ（２）が１回転して、弁フェース部（２
ｂ）の全周に肉盛り（６）が施された時点では、肉盛り
（６）部の約半周が再溶融されたのみであるので、引き
続きエンジンバルブ（２）を約１／２回転させて、トー
チ（８）により、肉盛り（６）部の残りの約半周を再溶
融させ、全周を再溶融した直後に。The engine valve (2) rotates once, and the valve face part (2)
When the build-up (6) has been applied to the entire circumference of b), only about half the circumference of the build-up (6) has been remelted, so continue to rotate the engine valve (2) by about 1/2 turn. Immediately after the remaining approximately half circumference of the built-up (6) portion is remelted using a torch (8), the entire circumference is remelted.
トーチ（８）のプラズマアーク（９）を停止させる。Stop the plasma arc (9) of the torch (8).
この２ト一チ式の発明によっても、前述した発明とほぼ
同様の作用効果を奏し、肉盛り部に割れが発生するＣｒ
、Ｃ，の添加量の上限値を、はぼ４５％まで高めること
ができる。This two-to-one type invention also has almost the same effect as the above-mentioned invention, and the Cr
, C, can be increased to as much as 45%.
前述した請求項（２）記載の発明は、１つのトーチによ
り肉盛りと再溶融とを行なうので、装置が簡略化する利
点がある。The invention described in claim (2) above has the advantage that the overlay and remelting are performed using one torch, and that the apparatus is simplified.
また、上記２ト一チ式の発明は、エンジンバルブ（２）
を１回転半させるだけで溶接が完了するので、エンジン
バルブ（２）を２回転させる請求項（２）記載の発明に
比べて生産性は高い。Further, the above-mentioned two-torque type invention has an engine valve (2).
Since welding is completed by rotating the engine valve (2) one and a half times, the productivity is higher than that of the invention described in claim (2) in which the engine valve (2) is rotated twice.
なお、上記２ト一チ式の発明において、再溶融用のトー
チ（８）の位置を、肉盛り用のトーチ（３）に対しほぼ
１８０°ずらした反対側としであるが。In the above-mentioned two-torch type invention, the position of the remelting torch (8) is shifted by approximately 180 degrees from the overlaying torch (3) on the opposite side.
その位置は適宜である。Its position is appropriate.
本発明方法は、上記複合盛金材料の外、ステライトをベ
ース材とし、これにＮ ｂ Ｃ、Ｗ Ｃ、Ｔ ｉ Ｃ１
Ｔ ａ Ｃなどの炭化物、ＴｉＮ、ＴａＮなどの窒化物
、Ａ１□０３、ＺｒＯ，などの酸化物等を添加した複合
盛会材料を用いた際にも効果的である。The method of the present invention uses stellite as a base material in addition to the above-mentioned composite metal material, and N b C, W C, T i C1
It is also effective when using a composite material to which carbides such as T a C, nitrides such as TiN and TaN, oxides such as A1□03, ZrO, etc. are added.
また、これらのステライトをベースとした複合盛金材料
の外、Ｃ０１Ｍ０１Ｃｒ、Ｓｉ系からなるＧｏ基合金、
すなわちトリバロイ（デュポン社の登録商標）として知
られているものをベースとし。In addition to these stellite-based composite metal materials, we also offer C01M01Cr, Go-based alloys made of Si,
Namely, based on what is known as Tribaloy (registered trademark of DuPont).
これに上記炭化物、窒化物、酸化物等を添加してなる複
合盛会材料を用いた際にも効果的である。It is also effective to use a composite material made by adding the above-mentioned carbides, nitrides, oxides, etc. to this material.
本発明方法に用いる加熱手段は、上記プラズマアーク以
外に、酸素−アセチレンガスやその他の熱源を用いても
よい。In addition to the plasma arc described above, oxygen-acetylene gas or other heat sources may be used as the heating means used in the method of the present invention.
本発明の方法は、バルブシートのシート部に肉盛溶接す
る際にも適用しうる。The method of the present invention can also be applied to overlay welding to the seat portion of a valve seat.
本発明方法によれば、硬質かつ高耐摩耗性を有する盛金
材料１例えばステライトと炭化物等の粉末との混合物か
らなる複合盛金材料の溶融性、溶着性が向上するととも
に、内部欠陥や残留応力等の発生するのが防止されるか
ら、硬化層を形成する炭化物等の添加割合を高めること
ができ、耐摩耗性、耐久性に優゛れる肉盛り部が得られ
る。According to the method of the present invention, the meltability and weldability of the hard and highly wear-resistant metal fill material 1, such as a composite metal fill material made of a mixture of powder such as stellite and carbide, are improved, and internal defects and residual Since the generation of stress, etc. is prevented, the addition ratio of carbide, etc. that forms the hardened layer can be increased, and a built-up part with excellent wear resistance and durability can be obtained.
第１図（Ａ）及び（Ｂ）は、請求項（１）及び（２）記
載の発明方法の一実施例を示し、（Ａ）は肉盛溶接中、
（Ｂ）は加熱再溶融中の概略説明図、第２図は、請求項
（１）及び（３）記載の発明方法の一実施例を示す概略
説明図。
第３図は、ステライトをベース材とし、これにＣｒ、Ｃ
，の添加量を変えて混合した複合盛金材料を、請求項（
２）記載の発明方法によりエンジンバルブの弁フェース
部に肉盛りした際における硬度、及び肉盛り部に割れが
発生するＣｒ、Ｃ２の添加量を従来と比較して示す図、
第４図は、従来の肉盛溶接方法を示す概略説明図である
。
（１）回転台
（２ａ）傘部
（３）トーチ（肉盛り用トーチ）
（４）プラズマアーク
（７）複合盛金材料（盛金材料）
（８）再溶融用トーチ
（２）エンジンバルブ
（２ｂ）弁フェース部
（６）肉盛り
（９）プラズマアーク
第
図
第２図
第３図
炭化クロム（Ｃｒ３Ｃ２）添加１ｔ（Ｗｔ’／、）第４
図FIGS. 1(A) and (B) show an embodiment of the inventive method according to claims (1) and (2), in which (A) shows during overlay welding,
(B) is a schematic explanatory diagram during heating and remelting, and FIG. 2 is a schematic explanatory diagram showing an embodiment of the inventive method according to claims (1) and (3). In Figure 3, stellite is used as the base material, and Cr, C
Composite metal material mixed with varying amounts of , is claimed in claim (
2) A diagram showing the hardness when overlaying the valve face portion of an engine valve by the method of the invention described above, and the amount of Cr and C2 added that causes cracks in the overlaying portion, in comparison with the conventional method. FIG. 2 is a schematic explanatory diagram showing a conventional overlay welding method. (1) Turntable (2a) Umbrella (3) Torch (Torch for overlaying) (4) Plasma arc (7) Composite overlaying material (overlaying material) (8) Torch for remelting (2) Engine valve ( 2b) Valve face part (6) Overlay (9) Plasma arc Figure 2 Figure 3 Addition of chromium carbide (Cr3C2) 1t (Wt'/,) 4th
figure
Claims (3)
る盛金材料を肉盛溶接するに際し、前記弁フェース部に
盛金材料を肉盛溶接したのち、肉盛り部を加熱手段によ
り加熱再溶融することを特徴とするエンジンバルブ等へ
の盛金材料の肉盛溶接方法。(1) When overlaying a metal material different from the base metal onto the valve face of an engine valve, after overlaying the metal material on the valve face, the overlay part is heated and reheated using a heating means. A method for overlaying a metal overlay material onto an engine valve, etc., which is characterized by being melted.
１周目において、適宜の肉盛溶接装置におけるトーチに
盛金材料を供給して、エンジンバルブ等の弁フェース部
の全周に肉盛溶接したのち、第２周目において、盛金材
料の供給を停止して、前記トーチにより肉盛り部を加熱
再溶融することを特徴とする請求項（１）記載のエンジ
ンバルブ等への盛金材料の肉盛溶接方法。(2) While rotating the engine valve, etc. in a constant direction, in the first round, supply metal material to the torch of an appropriate overlay welding device to overlay the entire circumference of the valve face of the engine valve, etc. After welding, in the second round, the supply of the overlay material is stopped, and the overlay part is heated and remelted by the torch, and the overlay part is heated and remelted by the torch. Overlay welding method for materials.
なくとも２つのトーチを備える適宜の肉盛溶接装置にお
ける一方のトーチに盛金材料を供給して、エンジンバル
ブ等の弁フェース部に肉盛溶接しつつ、肉盛溶接装置に
おける他方のトーチにより、肉盛り部を順次加熱再溶融
することを特徴とする請求項（１）記載のエンジンバル
ブ等への盛金材料の肉盛溶接方法。(3) While rotating the engine valve, etc. in a fixed direction, supply metal material to one torch of a suitable overlay welding device equipped with at least two torches, and perform overlay welding on the valve face of the engine valve, etc. 2. The method of overlay welding of overlay material to an engine valve or the like according to claim 1, wherein the overlay portion is sequentially heated and remelted using the other torch in the overlay welding device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15278390A JPH0446674A (en) | 1990-06-13 | 1990-06-13 | Method for cladding by welding with build-up material to engine valve or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15278390A JPH0446674A (en) | 1990-06-13 | 1990-06-13 | Method for cladding by welding with build-up material to engine valve or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0446674A true JPH0446674A (en) | 1992-02-17 |
Family
ID=15548056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15278390A Pending JPH0446674A (en) | 1990-06-13 | 1990-06-13 | Method for cladding by welding with build-up material to engine valve or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0446674A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017101273A (en) * | 2015-11-30 | 2017-06-08 | Ｊｆｅスチール株式会社 | Roll shaft member in molten metal plating bath, method for producing the same, and method for producing molten metal plated steel sheet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5380348A (en) * | 1976-12-25 | 1978-07-15 | Mitsubishi Heavy Ind Ltd | Plasma padding welding method |
| JPS6099480A (en) * | 1983-11-01 | 1985-06-03 | Fuji Valve Kk | Build-up welding method of engine valve or the like |
-
1990
- 1990-06-13 JP JP15278390A patent/JPH0446674A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5380348A (en) * | 1976-12-25 | 1978-07-15 | Mitsubishi Heavy Ind Ltd | Plasma padding welding method |
| JPS6099480A (en) * | 1983-11-01 | 1985-06-03 | Fuji Valve Kk | Build-up welding method of engine valve or the like |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017101273A (en) * | 2015-11-30 | 2017-06-08 | Ｊｆｅスチール株式会社 | Roll shaft member in molten metal plating bath, method for producing the same, and method for producing molten metal plated steel sheet |
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