JPH01119645A - Powdery high-speed steel - Google Patents
Powdery high-speed steelInfo
- Publication number
- JPH01119645A JPH01119645A JP27691887A JP27691887A JPH01119645A JP H01119645 A JPH01119645 A JP H01119645A JP 27691887 A JP27691887 A JP 27691887A JP 27691887 A JP27691887 A JP 27691887A JP H01119645 A JPH01119645 A JP H01119645A
- Authority
- JP
- Japan
- Prior art keywords
- hardness
- speed steel
- steel
- quenching
- powder
- 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
- 229910000997 High-speed steel Inorganic materials 0.000 title abstract description 16
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims abstract description 3
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005496 tempering Methods 0.000 abstract description 12
- 238000000137 annealing Methods 0.000 abstract description 10
- 238000010791 quenching Methods 0.000 abstract description 10
- 230000000171 quenching effect Effects 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 238000013329 compounding Methods 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 13
- 238000005520 cutting process Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 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、粉末冶金法によって得られる高速度鋼に係り
、特に高硬度および高靭性をもちかつ適切な加工性能を
有する高Ｖ高合金粉末高速度鋼に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to high-speed steel obtained by powder metallurgy, and in particular to high-V high-alloy powder having high hardness and toughness and suitable processing performance. Regarding high speed steel.
（従来の技術）
切削工具鋼を粉末冶金により製造する技術が知られてい
る。例えば特開昭６１−６２５５号には、高硬度かつ高
耐摩耗性の粉末高速度鋼が開示されている。(Prior Art) A technique for producing cutting tool steel by powder metallurgy is known. For example, Japanese Patent Application Laid-Open No. 61-6255 discloses a powder high speed steel having high hardness and high wear resistance.
この粉末高速度鋼は、窒化粉末を含有し、かつＷ ＋
２ Ｍ ｏを重量％で２７〜３２％含有するもので、耐
凝着摩耗性に優れ、高硬度を有している。This powder high speed steel contains nitrided powder and W +
It contains 27 to 32% by weight of 2 Mo, and has excellent adhesive wear resistance and high hardness.
一般に、高速度工具鋼は優れた高温硬さと耐摩耗性をも
ち、さらに適当な靭性もある。そして高速度工具鋼は、
Ｗ系のものとＭＯ系のものが知られているが、このほか
研削砥石の改善に伴い加工材に適する高Ｃ高Ｖ系の高速
度鋼も実用化されている（鉄鋼便覧ＩＶ、第３版、Ｐ、
１４８）。In general, high speed tool steels have excellent high temperature hardness and wear resistance, as well as adequate toughness. And high speed tool steel
W-based and MO-based high-speed steels are known, but with the improvement of grinding wheels, high-C, high-V high-speed steels suitable for processed materials have also been put into practical use (Steel Handbook IV, Part 3). Edition, P.
148).
（発明が解決しようとする問題点） しかしながら、従来の高速度鋼では、Ｗ、Ｍ。(Problem to be solved by the invention) However, in conventional high-speed steel, W, M.
量が多いと切削性能は良好であるが焼なまし硬さが十分
に硬いため加工性が劣り、またＷ、Ｍｏｌが少ないと加
工性は良好であるが焼入れ焼戻し硬さが十分でないため
切削性能が劣るというように、加工性および切削性の両
性質に優れた材料は見出されていなかった。If the amount is large, the cutting performance is good, but the annealing hardness is sufficiently hard, so the workability is poor, and if the amount of W and Mol is small, the workability is good, but the quenching and tempering hardness is not sufficient, resulting in poor cutting performance. No material has been found that is superior in both workability and cutting properties.
本発明者らは、炭化物形成元素であるＷ、Ｍ。The present inventors discovered that W, M, which is a carbide-forming element.
の量およびそのバランスに着目し、これらＷ、 ＭＯの
量および配合量に応じて加工性のよい高強度かつ高靭性
をもつ粉末高速度鋼を見出し、本発明を完成するに至っ
た。By focusing on the amount of W and MO and the balance thereof, we have found a powder high speed steel with good workability, high strength and high toughness depending on the amount and blending amount of W and MO, and have completed the present invention.
本発明の目的は、切削性に優れ、しかも加工性の良好な
粉末高速度鋼を提供することにある。An object of the present invention is to provide a powder high-speed steel having excellent machinability and good workability.
（問題点を解決するための手段）
そのために、本発明の粉末高速度鋼は、化学組成が重量
％で、
Ｃ：１．Ｏ〜 ３．０％
Ｃｒ ： ３．０〜５．０％
Ｓｉ ： ２．０％以下Ｍｎ ：
０．１０〜 ２．０％Ｖ：２．Ｏ〜１０．０％
Ｃｏ ： ５．０ 〜ｌ ５、０％Ｗ：８．
５ 〜２４．０％
Ｍｏ ： Ｏ〜１２．Ｏ％残部Ｆｅお
よび不純物からなり、かつ
Ｗ＋２Ｍｏ＝Ｗｅｑとするとき、Ｗｅｑが重量％で２１
〜２４％かつ重量比で
０≦２ Ｍ ｏ ／ Ｗ ６ ｑ≦０．６の関係を満た
す合金粉末から成形されることを特徴とする。(Means for Solving the Problems) To this end, the powder high-speed steel of the present invention has a chemical composition of C:1. O~3.0% Cr: 3.0~5.0% Si: 2.0% or less Mn:
0.10-2.0%V:2. O ~ 10.0% Co: 5.0 ~ l 5, 0% W: 8.
5-24.0% Mo: O-12. O% balance consists of Fe and impurities, and when W+2Mo=Weq, Weq is 21% by weight
~24% and is characterized by being molded from an alloy powder that satisfies the relationship of 0≦2 M o /W 6 q≦0.6 in terms of weight ratio.
すなわち、本発明の粉末高速度鋼は、Ｗ ｅ Ｑの範囲
を重量％で
２１≦Ｗ ｅ ｑ≦２４ □■
に定めている。これは、上記０式を満足するとき、焼な
まし硬さが比較的硬くなくかつ焼入れ焼戻し硬さが十分
に硬いからである。言い換えれば、Ｗｅｑの値がＷｅｑ
＜２１になると、焼入れ焼戻し硬さ（ＨＴ硬さ）が６８
未満になって切削性が劣り、２４ ＜ Ｗ ｅ ｑにな
ると、焼なまし硬さ（ＳＡ硬さ）が３８を超え加工性が
悪くなるからである。That is, in the powder high-speed steel of the present invention, the range of W e Q is defined as 21≦W eq≦24 □■ in weight percent. This is because when the above formula 0 is satisfied, the annealing hardness is relatively low and the quenching and tempering hardness is sufficiently hard. In other words, the value of Weq is Weq
<21, the quenching and tempering hardness (HT hardness) is 68
If 24<W eq, the annealing hardness (SA hardness) exceeds 38, resulting in poor machinability.
またＷに対しＭｏ量を所定値以下に定めている。Moreover, the amount of Mo is set to be less than a predetermined value with respect to W.
すなわち、重量比で
０≦２ Ｍ ｏ ／ Ｗ ｅ ｑ≦０，６ □■を満足
する。■式において、２ Ｍ ｏ ／ Ｗ ｅ ｑ≦０
゜６としたのは、Ｍｏに対しＷを相対的に多（すること
により、十分大きな焼入れ焼戻し硬さ（ＨＴ硬さ）６８
以上が得られ、抗折力３５０ｋｇｆ／ｍｍ２以上が得ら
れるとともに、適切な加工性能を示す焼なまし硬さ（Ｓ
Ａ硬さ）３５以下が得られるからである。That is, the weight ratio satisfies 0≦2 M o /W eq≦0,6 □■. ■In the formula, 2 M o / W eq≦0
The reason why it is set to 68 is because the amount of W is relatively large compared to Mo (by doing so, a sufficiently large quenching and tempering hardness (HT hardness) of 68
In addition to obtaining a transverse rupture strength of 350 kgf/mm2 or more, the annealing hardness (S
This is because A hardness) of 35 or less can be obtained.
（発明の効果）
本発明の粉末高速度鋼によれば、高硬度、高靭性をもち
かつ適切な加工性能をもつので、切削性に優れ、切削工
具として苛酷な使用条件に耐えるとともに、工具製造時
の機械加工が容易であるという効果がある。(Effects of the Invention) The powder high-speed steel of the present invention has high hardness, high toughness, and appropriate machining performance, so it has excellent machinability and can withstand severe usage conditions as a cutting tool, and can be used in tool manufacturing. This has the effect of making machining easier.
（実施例） 本発明の実施例について述べる。(Example) Examples of the present invention will be described.
第１表に示す合金組成で残部実質的にＦｅからなる原料
粉を容器に充填して熱間静水圧プレス（ＨＩＰ）にかけ
、ソーキング（拡散処理）、鍛造後、焼なましした。Raw material powder having the alloy composition shown in Table 1 with the remainder essentially consisting of Fe was filled into a container, subjected to hot isostatic pressing (HIP), soaked (diffusion treatment), forged, and annealed.
これについて、焼なまし硬さを測定した。その後、焼入
れ焼戻しし、焼戻し硬さおよび抗折力を測定した。Regarding this, the annealing hardness was measured. Thereafter, it was quenched and tempered, and its tempering hardness and transverse rupture strength were measured.
上記焼なましの処理条件は、８７０℃、１時間保持後、
徐冷であり、焼入れ焼戻しの処理条件は、１１５０℃〜
１２５０℃より焼入れ、５００℃〜６００℃で焼戻しで
ある。The processing conditions for the above annealing are: 870°C, after holding for 1 hour,
It is slow cooling, and the processing conditions for quenching and tempering are 1150°C ~
Hardening is performed from 1250°C, and tempering is performed at 500°C to 600°C.
上述の焼なまし硬さ（ＳＡ硬さ）、焼入れ焼戻し硬さ（
ＨＴ硬さ）および焼入れ焼戻し後の抗折力は第２表に示
すとおりであった。The above-mentioned annealing hardness (SA hardness), quenching and tempering hardness (
HT hardness) and transverse rupture strength after quenching and tempering were as shown in Table 2.
第２表から明らかなように、従来例と本発明を比較した
場合、Ｗｅｑと２ Ｍ ｏ ／ Ｗ ｅ ｑの値が所定
範囲内にあるとき焼なまし硬さが適切な加工性能をもつ
ほどに軟らかくかつ焼入れ焼戻し硬さが十分に硬いこと
が判る。As is clear from Table 2, when comparing the conventional example and the present invention, when the values of Weq and 2M o / W e q are within the predetermined range, the annealing hardness is such that it has appropriate machining performance. It can be seen that it is soft and sufficiently hard after quenching and tempering.
すなわち、ＭｏとＷの量および配合量のバランスによっ
て焼なまし硬さが加工しやすい程度に硬くなくなり、焼
入れ焼戻し硬さが硬くなるのである。また本発明では、
抗折力が３６０ ｋ ｇ ｆ ／ ｍｍ２以上であるこ
とから、高硬度かつ高靭性をもつ粉末高速度鋼といえる
。That is, depending on the balance between the amounts and blending amounts of Mo and W, the annealing hardness becomes hard enough to be easily processed, and the quenching and tempering hardness becomes hard. Further, in the present invention,
Since the transverse rupture strength is 360 kgf/mm2 or more, it can be said to be a powder high speed steel with high hardness and high toughness.
本発明において、Ｃｒを３．０％以上加えるのは耐摩耗
性および耐食性を高めかつ焼きを入りやすくし浸炭を促
進するためであり、■を２．０％以上加えるのは鋼の結
晶粒を細かくし靭性を高めかつ硬い炭化物をつくり耐摩
耗性を向上させるためであり、Ｃｏを５．０％以上加え
るのは高温で十分に硬い熱硬化性を発揮させるためであ
る。In the present invention, adding 3.0% or more of Cr is to increase wear resistance and corrosion resistance, making it easier to harden and promote carburization, and adding 2.0% or more of Cr is to improve the crystal grains of steel. This is to improve wear resistance by finely grinding and increasing toughness and creating a hard carbide, and the reason why 5.0% or more of Co is added is to exhibit sufficiently hard thermosetting properties at high temperatures.
なお、本発明による粉末高速度鋼は、加工時に被削性を
改善するため、必要に応じてｓ、ｐｂ、Ｃａ、Ｔｅ、Ｓ
ｅ、Ｂｉ等を合金元素として加えることもできる。In addition, in order to improve the machinability during processing, the powder high-speed steel according to the present invention may contain s, pb, Ca, Te, and S as necessary.
E, Bi, etc. can also be added as alloying elements.
Claims (1)
〜２４％かつ重量比で ０≦２Ｍｏ／Ｗｅｑ≦０．６ の関係を満たす合金粉末から成形される粉末高速度鋼。[Claims] Chemical composition in weight%: C: 1.0-3.0% Cr: 3.0-5.0% Si: 2.0% or less Mn: 0.10-2.0% V: 2.0-10.0% Co: 5.0-15.0% W: 8.5-24.0% Mo: 0-12.0% The remainder consists of Fe and impurities, and W+2Mo=Weq When Weq is 21% by weight
24% and satisfies the relationship of 0≦2Mo/Weq≦0.6 in terms of weight ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62276918A JP2625773B2 (en) | 1987-10-30 | 1987-10-30 | Powder high speed steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62276918A JP2625773B2 (en) | 1987-10-30 | 1987-10-30 | Powder high speed steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01119645A true JPH01119645A (en) | 1989-05-11 |
| JP2625773B2 JP2625773B2 (en) | 1997-07-02 |
Family
ID=17576207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62276918A Expired - Fee Related JP2625773B2 (en) | 1987-10-30 | 1987-10-30 | Powder high speed steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2625773B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02153047A (en) * | 1988-12-06 | 1990-06-12 | Hitachi Metals Ltd | Powder high speed tool steel |
| JPH04221043A (en) * | 1990-12-19 | 1992-08-11 | Kubota Corp | High speed steel type sintered alloy |
| JPH04221041A (en) * | 1990-12-19 | 1992-08-11 | Kubota Corp | High speed steel type sintered alloy |
| WO2000044956A1 (en) * | 1999-01-29 | 2000-08-03 | Crs Holdings, Inc. | High-hardness powder metallurgy tool steel and article made therefrom |
| JP2008248307A (en) * | 2007-03-30 | 2008-10-16 | Kubota Corp | High toughness and high speed steel-base sintered alloy |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532134A (en) * | 2014-12-18 | 2015-04-22 | 无锡伊诺永利文化创意有限公司 | High-speed steel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58144456A (en) * | 1982-02-18 | 1983-08-27 | Nachi Fujikoshi Corp | Powder high speed tool steel |
| JPS6447836A (en) * | 1987-08-18 | 1989-02-22 | Kobe Steel Ltd | High hardness and high speed sintered steel ingot having excellent hot workability |
-
1987
- 1987-10-30 JP JP62276918A patent/JP2625773B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58144456A (en) * | 1982-02-18 | 1983-08-27 | Nachi Fujikoshi Corp | Powder high speed tool steel |
| JPS6447836A (en) * | 1987-08-18 | 1989-02-22 | Kobe Steel Ltd | High hardness and high speed sintered steel ingot having excellent hot workability |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02153047A (en) * | 1988-12-06 | 1990-06-12 | Hitachi Metals Ltd | Powder high speed tool steel |
| JPH04221043A (en) * | 1990-12-19 | 1992-08-11 | Kubota Corp | High speed steel type sintered alloy |
| JPH04221041A (en) * | 1990-12-19 | 1992-08-11 | Kubota Corp | High speed steel type sintered alloy |
| WO2000044956A1 (en) * | 1999-01-29 | 2000-08-03 | Crs Holdings, Inc. | High-hardness powder metallurgy tool steel and article made therefrom |
| JP2002535496A (en) * | 1999-01-29 | 2002-10-22 | シーアールエス ホールディングス，インコーポレイテッド | Hard tool steels and powder metallurgy steels therefrom |
| US6482354B1 (en) | 1999-01-29 | 2002-11-19 | Crs Holdings, Inc. | High-hardness powder metallurgy tool steel and article made therefrom |
| KR100698855B1 (en) * | 1999-01-29 | 2007-03-26 | 씨알에스 홀딩즈 인코포레이티드 | High-hardness powder metallurgy tool steel and article made therefrom |
| JP2008248307A (en) * | 2007-03-30 | 2008-10-16 | Kubota Corp | High toughness and high speed steel-base sintered alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2625773B2 (en) | 1997-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |