JPH046250A - High strength heat resisting alloy for injection molding powder metallurgy for high temperature structural member - Google Patents
High strength heat resisting alloy for injection molding powder metallurgy for high temperature structural memberInfo
- Publication number
- JPH046250A JPH046250A JP10748890A JP10748890A JPH046250A JP H046250 A JPH046250 A JP H046250A JP 10748890 A JP10748890 A JP 10748890A JP 10748890 A JP10748890 A JP 10748890A JP H046250 A JPH046250 A JP H046250A
- Authority
- JP
- Japan
- Prior art keywords
- injection molding
- alloy
- powder metallurgy
- molding powder
- structural member
- 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.)
- Granted
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 18
- 239000000956 alloy Substances 0.000 title claims abstract description 18
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 14
- 238000001746 injection moulding Methods 0.000 title claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 abstract description 6
- 238000009692 water atomization Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 229910052758 niobium Inorganic materials 0.000 abstract description 2
- 229910052804 chromium Inorganic materials 0.000 abstract 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract 2
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 12
- 239000000843 powder Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 239000003779 heat-resistant material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はガスタービンの高温構造部材に適用される射出
成形粉末冶金用高強度耐熱合金に関し、特にボイラー、
内燃機関等のように約５００℃以上の環境下で使用する
高温構造部材に有利に使用される同合金に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a high-strength heat-resistant alloy for injection molding powder metallurgy applied to high-temperature structural members of gas turbines, and in particular to boilers,
The present invention relates to the same alloy, which is advantageously used in high-temperature structural members used in environments of about 500° C. or higher, such as internal combustion engines.
従来５００℃以上の高温、高応力下で使用されるガスタ
ービン等の高温構造部材には射出成形粉末冶金材は適用
されていない。Conventionally, injection molded powder metallurgy materials have not been applied to high-temperature structural members such as gas turbines that are used at high temperatures of 500° C. or higher and under high stress.
射出成形粉末冶金用合金粉末の粒径は一般に平均粒径１
０〜２０μｍ程度が必要であり、その製造は一般に水ア
トマイズ法である。しかしながら、従来ガスタービン高
温構造部材（鍛造、鋳造材）に使用されている析出強化
型耐熱材は水アトマイズ法で射出成形粉末冶金に適用で
きる粉末を製造することができない。又、析出強化型耐
熱材は不活性雰囲気で粉末を製造するガスアトマイズ法
によって粉末化することは可能であるが、射出成形粉末
冶金に要求される平均粒径１０〜２０μｍ程度の粉末を
製造することは困難である。The particle size of alloy powder for injection molding powder metallurgy is generally an average particle size of 1
A thickness of about 0 to 20 μm is required, and its production is generally by water atomization. However, the precipitation-strengthened heat-resistant materials conventionally used for gas turbine high-temperature structural members (forged and cast materials) cannot be used to produce powder that can be applied to injection molding powder metallurgy using the water atomization method. In addition, precipitation-strengthened heat-resistant materials can be made into powder by the gas atomization method, which produces powder in an inert atmosphere, but it is difficult to produce powder with an average particle size of about 10 to 20 μm, which is required for injection molding powder metallurgy. It is difficult.
本発明は上記技術水準に鑑み、射出成形粉末冶金材を高
温構造部材に適用するために水アトマイズ法により製造
可能な化学組成の高強度耐熱合金を提供しようとするも
のである。In view of the above state of the art, it is an object of the present invention to provide a high-strength, heat-resistant alloy with a chemical composition that can be manufactured by a water atomization method in order to apply injection-molded powder metallurgy materials to high-temperature structural members.
本発明は５００℃以上の高温において使用可能な射出成
形粉末冶金用高強度耐熱合金であって、重量％で、Ｃ：
０．２〜０．６、Ｃｒ：１５〜２５、Ｎｉ：１５〜２５
、ｃｏ＝１５〜３０、Ｍｏ：５〜１５、Ｗ：１〜８、Ｎ
ｂ：１〜８を含有し、残りがＦｅと不可避不純物からな
るものである。The present invention is a high-strength heat-resistant alloy for injection molding powder metallurgy that can be used at high temperatures of 500°C or higher, and has a C:
0.2-0.6, Cr: 15-25, Ni: 15-25
, co=15-30, Mo: 5-15, W: 1-8, N
b: Contains 1 to 8, with the remainder consisting of Fe and unavoidable impurities.
以下に本発明の成分限定理由を述べる。 The reasons for limiting the ingredients of the present invention will be described below.
（ａ） Ｃはオーステナイトマトリックスに固溶して
マトリックスの高温強度を高めるＣｒ、ｉｌ。(a) C is Cr or il, which solid-solves in the austenite matrix and increases the high-temperature strength of the matrix.
Ｎｏ、Ｎｂと炭化物を生成し、結晶粒界及び粒内を強化
し、合金の融点を下げ焼結性を改善する作用があるが、
その含有量が０．２％未満では前記の所望の効果が得ら
れず、一方、０．６％を越えて含有させると強度が低下
することから、その含有量を０．２〜０．６％と定めた
。It has the effect of forming carbides with No and Nb, strengthening grain boundaries and inside grains, lowering the melting point of the alloy and improving sinterability.
If the content is less than 0.2%, the above-mentioned desired effect cannot be obtained, and on the other hand, if the content exceeds 0.6%, the strength will decrease, so the content should be adjusted to 0.2 to 0.6%. %.
（社）Ｃｒはすぐれた高温耐酸化性を付与する上で不可
欠なオーステナイト構成元素で、その含有量が１５％未
滴では所望のすぐれた高温耐酸化性を確保することがで
きず、２５％を越えて添加すると高温強度を劣化させる
ので、その含有量を１５〜２５％と定めた。(Company) Cr is an essential austenite constituent element for imparting excellent high-temperature oxidation resistance, and if the content is less than 15%, it is not possible to secure the desired high-temperature oxidation resistance; If added in excess of this amount, the high-temperature strength would deteriorate, so the content was set at 15 to 25%.
（Ｃ） ＮｉはＣｒとの共存において高温強度を向上
させる作用があるが、その含有量が１５％未満では前記
の所望の効果が得られず一方２５％を越えて含有させる
と耐高温腐蝕性に劣化が生じるので、その含有量を１５
〜２５％と定めた。(C) Ni has the effect of improving high-temperature strength when coexisting with Cr, but if its content is less than 15%, the above-mentioned desired effect cannot be obtained, while if it is contained more than 25%, high-temperature corrosion resistance is reduced. deterioration occurs, so its content is reduced to 15%.
It was set at ~25%.
（６） Ｃｏはクリープ強度を高とる作用があり、その
含有量が１５％未満では前記の所望の効果が得られず、
一方３０％を越えて含有させると耐高温酸化性が劣化す
るので、その含有量を１５〜３０％と定めた。(6) Co has the effect of increasing creep strength, and if its content is less than 15%, the desired effect described above cannot be obtained,
On the other hand, if the content exceeds 30%, the high temperature oxidation resistance deteriorates, so the content was set at 15 to 30%.
（ｅ） Ｍｏは本発明合金において、高温クリープ強
度を付与する最も重要な合金元素であり、最低５％を必
要とするが、１５％を越えて添加すると靭性が劣化する
ことから、その含有量を６〜１５％と定めた。(e) Mo is the most important alloying element that imparts high-temperature creep strength to the alloy of the present invention, and requires a minimum content of 5%; however, since adding more than 15% deteriorates toughness, the content was set at 6-15%.
（ｆ） Ｗは高温のクリープ強度を付与する作用があ
り、その含有量が１％未満では前記の所望の効果が得ら
れず、一方、８％を越えて添加すると耐高温酸化性が劣
化する傾向にあるのでその添加量を１〜８％と定めた。(f) W has the effect of imparting high-temperature creep strength; if its content is less than 1%, the desired effect described above cannot be obtained; on the other hand, if it is added in excess of 8%, high-temperature oxidation resistance deteriorates. Because of this tendency, the amount added was set at 1 to 8%.
（ｌ Ｎｂは高温のクリープ強度を付与する作用があ
り、その含有量が１％未満では前記の所望の効果が得ら
れず、一方、８％を越えて添加すると靭性が劣化するこ
とから、その含有量を１〜８％と定めた。(l Nb has the effect of imparting creep strength at high temperatures, and if its content is less than 1%, the desired effect described above cannot be obtained, while if it is added in excess of 8%, the toughness deteriorates. The content was determined to be 1 to 8%.
大気高周波誘導溶解炉にて、本発明合金及び比較合金を
溶製し、公称１０ｋｇのインゴットに鋳造した。その後
、インゴットを水アトマイズ法にて粉末化した。これら
粉末の化学組成を第１表に示す。これら粉末を射出成形
冶金法を用いて、板厚：３ＷＸ平行部幅：４＋ａｍｘつ
かみ部幅＝１６■×全長：８０ｍａの寸法をもった試験
片素材に焼結した。この試験片を用い雰囲気二人気中、
加熱温度：６００℃において、引張試験及び付加荷重二
３８．０ ｋｇｆ／ａ＋ｍ２でクリープ破断試験を実施
した。その結果を第１表に合せて示した。The present invention alloy and comparative alloy were melted in an atmospheric high frequency induction melting furnace and cast into ingots nominally weighing 10 kg. Thereafter, the ingot was pulverized by a water atomization method. The chemical composition of these powders is shown in Table 1. These powders were sintered using an injection molding metallurgy method to form a test piece material having dimensions of plate thickness: 3W x parallel part width: 4 + am x grip part width = 16 mm x total length: 80 ma. Using this test piece, during two atmosphere tests,
A tensile test and a creep rupture test were conducted at a heating temperature of 600° C. and an additional load of 38.0 kgf/a+m2. The results are shown in Table 1.
本発明の射出成形粉末冶金用合金は従来の射出成形粉末
冶金用合金に比べ高温強度が極めて優れている。従って
、射出成形粉末冶金部材を高温強度の要求される例えば
ガスタービン高温部品に適用することができ、工業的価
値は非常に大きい。The alloy for injection molding powder metallurgy of the present invention has extremely superior high-temperature strength compared to conventional alloys for injection molding powder metallurgy. Therefore, the injection-molded powder metallurgy member can be applied to high-temperature parts of gas turbines that require high-temperature strength, for example, and has great industrial value.
Claims (1)
ｉ：１５〜２５、Ｃｏ：１５〜３０、Ｍｏ：５〜１５、
Ｗ：１〜８、Ｎｂ：１〜８を含有し、残りがＦｅと不可
避不純物からなる組成を有することを特徴とする高温構
造部材用射出成形粉末冶金用高強度耐熱合金。In weight%, C: 0.2-0.6, Cr: 15-25, N
i: 15-25, Co: 15-30, Mo: 5-15,
A high-strength, heat-resistant alloy for injection molding powder metallurgy for high-temperature structural members, characterized in that it contains W: 1 to 8, Nb: 1 to 8, and the remainder is Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10748890A JP2686342B2 (en) | 1990-04-25 | 1990-04-25 | High strength heat resistant alloy for injection molding powder metallurgy for high temperature structural members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10748890A JP2686342B2 (en) | 1990-04-25 | 1990-04-25 | High strength heat resistant alloy for injection molding powder metallurgy for high temperature structural members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH046250A true JPH046250A (en) | 1992-01-10 |
| JP2686342B2 JP2686342B2 (en) | 1997-12-08 |
Family
ID=14460486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10748890A Expired - Lifetime JP2686342B2 (en) | 1990-04-25 | 1990-04-25 | High strength heat resistant alloy for injection molding powder metallurgy for high temperature structural members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2686342B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020056106A (en) * | 2018-09-27 | 2020-04-09 | 株式会社アテクト | Method for manufacturing heat resistant member made of nickel-based alloy or iron-based alloy |
-
1990
- 1990-04-25 JP JP10748890A patent/JP2686342B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020056106A (en) * | 2018-09-27 | 2020-04-09 | 株式会社アテクト | Method for manufacturing heat resistant member made of nickel-based alloy or iron-based alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2686342B2 (en) | 1997-12-08 |
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