JPH04280918A - Method for working martensitic precipitation hardening stainless steel - Google Patents
Method for working martensitic precipitation hardening stainless steelInfo
- Publication number
- JPH04280918A JPH04280918A JP6897491A JP6897491A JPH04280918A JP H04280918 A JPH04280918 A JP H04280918A JP 6897491 A JP6897491 A JP 6897491A JP 6897491 A JP6897491 A JP 6897491A JP H04280918 A JPH04280918 A JP H04280918A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- temperature
- working
- martensitic
- precipitation hardening
- 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
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 20
- 229910000734 martensite Inorganic materials 0.000 title claims abstract description 17
- 238000004881 precipitation hardening Methods 0.000 title claims abstract description 16
- 239000010935 stainless steel Substances 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims description 18
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 29
- 238000012545 processing Methods 0.000 claims description 23
- 239000000243 solution Substances 0.000 abstract description 10
- 239000006104 solid solution Substances 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 8
- 229910001566 austenite Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000003672 processing method Methods 0.000 description 7
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
Landscapes
- Forging (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明はＪＩＳ−ＳＵＳ６３０
，ＳＵＳ６３１等のマルテンサイト系の析出硬化型ステ
ンレス鋼の加工方法に関する。[Industrial Application Field] This invention applies to JIS-SUS630
, SUS631, and other martensitic precipitation hardening stainless steels.
【０００２】［従来の技術及び発明が解決しようとする
課題］ステンレス鋼は、鉄にＣｒを含有させて合金表面
にＣｒの酸化膜を形成せしめ、合金表面を不動体化した
ものであって、これにはＣｒを合金元素の主成分とし、
焼入れによってマルテンサイト組織となる中炭素のマル
テンサイト系ステンレス鋼，同じくＣｒを合金元素の主
成分とし、焼入れしてもフェライト組織のままの、即ち
硬化することのできない低炭素のフェライト系ステンレ
ス鋼，Ｃｒ−Ｎｉを主成分とし、オ−ステナイト１相か
ら成るオ−ステナイト系ステンレス鋼、更にＣｒ−Ｎｉ
を主成分とし、これに特殊元素を加えた析出硬化型ステ
ンレス鋼などがある。[Prior Art and Problems to be Solved by the Invention] Stainless steel is made by incorporating Cr into iron to form a Cr oxide film on the alloy surface, making the alloy surface a passivation material. This uses Cr as the main alloying element,
A medium-carbon martensitic stainless steel that becomes a martensitic structure when quenched; a low-carbon ferritic stainless steel that also has Cr as its main alloying element and remains a ferritic structure even after quenching, that is, it cannot be hardened; Austenitic stainless steel mainly composed of Cr-Ni and one austenite phase, and further Cr-Ni
There are precipitation-hardening stainless steels whose main ingredients are , with special elements added to them.
【０００３】マルテンサイト系ステンレス鋼は強さ，硬
さ等に優れる反面耐食性，加工性が十分でなく、またフ
ェライト系ステンレス鋼は加工性，耐食性はマルテンサ
イト系ステンレス鋼よりも優れているが、硬さ，強度が
十分でない。Although martensitic stainless steel has excellent strength and hardness, it does not have sufficient corrosion resistance and workability, and ferritic stainless steel has better workability and corrosion resistance than martensitic stainless steel, but Hardness and strength are not sufficient.
【０００４】一方オ−ステナイト系ステンレス鋼は、加
工性が良くまた非常に耐食性が良いが、硬さが低く、機
械的強度も低いので構造用などに好適な材料とは言えな
い。On the other hand, austenitic stainless steel has good workability and very good corrosion resistance, but it has low hardness and low mechanical strength, so it cannot be said to be a suitable material for structural purposes.
【０００５】析出硬化型ステンレス鋼は、強度，耐食性
，加工性などの特性を兼備した材料として開発されたも
のであって、Ｃｕ，Ａｌ，Ｔｉなど特殊元素を硬化元素
として含有し、熱処理によって強度を発現する。Precipitation hardening stainless steel was developed as a material that has properties such as strength, corrosion resistance, and workability. It contains special elements such as Cu, Al, and Ti as hardening elements, and its strength is increased by heat treatment. Express.
【０００６】即ちこの析出硬化型ステンレス鋼の場合、
一般に１０５０℃程度の温度に加熱してオ−ステナイト
化し、特殊添加元素を固溶化した後急冷してマルテンサ
イト組織とし（焼き入れし）、次いで４００〜５００℃
の低温で時効処理を行う。この時効処理によって硬化元
素が急冷による過飽和状態から微細な析出物として析出
し始め、ここで硬さ，強度を発現する。In other words, in the case of this precipitation hardening stainless steel,
Generally, it is heated to a temperature of about 1050°C to form austenite, special additive elements are made into a solid solution, and then rapidly cooled to form a martensitic structure (quenched), and then heated to a temperature of 400 to 500°C.
Aging treatment is performed at low temperatures. Through this aging treatment, hardening elements begin to precipitate as fine precipitates from the supersaturated state caused by rapid cooling, and this is where the hardening elements develop hardness and strength.
【０００７】従ってこの析出硬化型ステンレス鋼の場合
、その加工手順として先ず素材を１０５０℃程度の高温
まで加熱してオ−ステナイトと成し、そのような高温で
熱間塑性加工して所要の形状を付与し、しかる後一旦こ
れを放冷により冷却した後上記のような熱処理、即ち溶
体化処理及び時効処理を行って強度を発現せしめる。Therefore, in the case of precipitation hardening stainless steel, the processing procedure is to first heat the material to a high temperature of about 1050°C to form austenite, and then hot plastic work it at such a high temperature to form the desired shape. After that, it is once cooled by standing to cool and then subjected to the above-mentioned heat treatment, that is, solution treatment and aging treatment to develop strength.
【０００８】ところで析出硬化型ステンレス鋼にもマル
テンサイト系のものとオ−ステナイト系のものとがあり
、このうちマルテンサイト系のものは、マルテンサイト
組織状態での加工が難しいために一般に上記のような高
温に加熱してオ−ステナイト状態とし、その温度で塑性
加工、即ち熱間加工を行うようにしている。By the way, there are two types of precipitation hardening stainless steels: martensitic stainless steel and austenitic stainless steel. Of these, martensitic stainless steel is generally difficult to process due to its martensitic structure. The material is heated to such a high temperature that it becomes an austenite state, and plastic working, that is, hot working, is performed at that temperature.
【０００９】しかしながらこのような高温での熱間加工
の場合、その後の冷却によって大きな体積収縮が生じ、
加工寸法が大きく変化する。即ちこのような熱間加工で
は精密鍛造など精度の高い加工ができないのであり、そ
こで後において切削等加工が必要であってその際の削り
代も多くなり、製品の寸法出しも難しくなる。また加え
てこのような熱間加工の場合、表面に発生するスケール
の量が多いといった問題もある。[0009] However, in the case of hot working at such high temperatures, large volumetric contraction occurs due to subsequent cooling.
Processing dimensions change significantly. That is, such hot processing does not allow highly accurate processing such as precision forging, and therefore processing such as cutting is required later, which increases the cutting allowance and makes it difficult to obtain the dimensions of the product. In addition, in the case of such hot working, there is a problem that a large amount of scale is generated on the surface.
【００１０】一方マルテンサイト系ステンレス鋼を冷材
から温間加工温度まで加熱してこれに塑性加工を施す方
法もあり、この場合その後の冷却による寸法変化を小さ
く抑え得、また発生するスケールの量を少なく抑え得る
が、この材料は温間加工温度ではマルテンサイト組織の
ままであり、従って硬い材料のままで加工を加えること
となるために加工し辛く、場合により材料割れが発生す
るなど加工性の点で問題がある。On the other hand, there is a method in which martensitic stainless steel is heated from a cold material to a warm working temperature and subjected to plastic working. In this case, dimensional changes due to subsequent cooling can be suppressed to a minimum, and the amount of scale generated can be reduced. However, this material remains in a martensitic structure at warm processing temperatures, so it is difficult to process as it is processed as a hard material, and in some cases material cracks may occur, resulting in poor workability. There is a problem with this.
【００１１】[0011]
【課題を解決するための手段】本願の発明はこのような
課題を解決するためになされたものであり、素材を一旦
１０００℃以上に加熱した後Ｍｓ点以上の温間加工温度
まで冷却して塑性加工を施すことを特徴とするものであ
る。[Means for Solving the Problems] The invention of the present application has been made to solve such problems, and the material is heated to a temperature of 1000°C or higher and then cooled to a warm processing temperature of the Ms point or higher. It is characterized by being subjected to plastic working.
【００１２】また本願の別の発明は、素材を一旦１００
０℃以上に加熱した後Ｍｓ点以上の温間加工温度まで冷
却して塑性加工を施し、その後これを冷却した後に別途
溶体化処理を行うことなく時効処理することを特徴とす
る。[0012] In another invention of the present application, the material is once 100%
It is characterized in that it is heated to 0° C. or higher and then cooled to a warm working temperature of Ms point or higher to perform plastic working, and then, after cooling, it is subjected to aging treatment without separately performing solution treatment.
【００１３】［作用及び発明の効果］このように本発明
は、マルテンサイト系析出硬化型ステンレス鋼を一旦１
０００℃以上に加熱した後Ｍｓ点以上の温間加工温度（
例えば３００℃程度の温度）で塑性加工を加えるように
したものである。[Operations and Effects of the Invention] As described above, the present invention provides a method for manufacturing martensitic precipitation hardening stainless steel.
After heating to 000℃ or higher, the warm working temperature is higher than the Ms point (
For example, plastic working is applied at a temperature of about 300°C.
【００１４】一般に温間加工と言われるものは冷材を所
定の加工温度まで加熱した後その温度において鍛造など
の加工を加えるものであり、マルテンサイト系の析出硬
化型ステンレス鋼の場合、マルテンサイト組織状態で加
工することとなって前述したような不具合を発生する。[0014] Generally speaking, warm working involves heating a cold material to a predetermined processing temperature and then subjecting it to processing such as forging at that temperature. Processing is performed in the state of the structure, and the above-mentioned problems occur.
【００１５】しかるに本発明では鋼材を一旦１０００℃
以上の高温に加熱した後Ｍｓ点以上の温間加工領域まで
降温して塑性加工するようにしており、この場合鋼材を
軟らかいオ−ステナイト組織状態で加工できるため、加
工を容易に行うことができる。However, in the present invention, the steel material is heated to 1000°C once.
After heating to a high temperature above, the temperature is lowered to a warm working region above the Ms point and plastic working is performed. In this case, the steel material can be worked in a soft austenite structure state, making it easy to work. .
【００１６】これはマルテンサイト系析出硬化型ステン
レス鋼の場合、一旦加熱してオ−ステナイトにするとこ
れを降温した場合でも長時間オ−ステナイト状態を保つ
特性がある（Ｍｓ点以上で）ことを利用したものである
。This means that in the case of martensitic precipitation hardening stainless steel, once it is heated to become austenite, it has the property of remaining in an austenite state for a long time even when the temperature is lowered (above the Ms point). It was used.
【００１７】因みに図２は鋼材（ＳＵＳ６３０）を一旦
１０５０℃まで昇温した後にＭｓ点以上の温度範囲内で
冷却して塑性加工（グリーブル試験）を行った場合と（
□印）、従来の方法に従って冷材を直接加工温度まで加
熱して塑性加工した場合（○印）とで変形抵抗，絞り率
（変形能）がどのように違ってくるかを示したものであ
る。但し図中横軸は加工時の温度を、縦軸は変形抵抗及
び絞り率を示している。Incidentally, Figure 2 shows the case where a steel material (SUS630) was once heated to 1050°C and then cooled within the temperature range above the Ms point and subjected to plastic working (Greeble test).
This shows how the deformation resistance and reduction rate (deformability) differ between the conventional method (marked with □) and the case where the cold material is directly heated to the processing temperature and plastically worked (marked with ○). be. However, in the figure, the horizontal axis shows the temperature during processing, and the vertical axis shows the deformation resistance and reduction rate.
【００１８】従来の方法による具体的な処理条件が図１
（イ）に示してある。具体的には冷材（ＳＵＳ６３０）
を２００℃／秒で温度Ｔ℃まで昇温し、その温度に１０
０秒間保持した後引張り試験している（引張速度２イン
チ／秒）。The specific processing conditions for the conventional method are shown in FIG.
It is shown in (a). Specifically, cold material (SUS630)
was heated at a rate of 200°C/sec to a temperature of T°C, and then heated to that temperature for 10
After holding for 0 seconds, a tensile test is carried out (pulling speed: 2 inches/second).
【００１９】一方本発明に従う処理方法による具体的処
理条件が図１（ロ）に示してある。具体的には冷材（Ｓ
ＵＳ６３０）を２００℃／秒の速度で１０５０℃まで昇
温して１００秒間保持した後温度Ｔ℃まで降温し、そし
てその温度に１００秒間保持した後引張り試験している
。On the other hand, specific processing conditions according to the processing method according to the present invention are shown in FIG. 1(b). Specifically, cold material (S
US630) was heated to 1050°C at a rate of 200°C/sec, held for 100 seconds, then lowered to temperature T°C, held at that temperature for 100 seconds, and then subjected to a tensile test.
【００２０】図２に示されているように、図１（ロ）の
処理方法の場合、（イ）の処理方法に比べて変形抵抗が
小さく、また絞り率も大きくなっている。これは（イ）
の処理方法の場合には鋼材をマルテンサイト状態のまま
で加工することとなるのに対し、（ロ）の方法の場合に
は鋼材をオ−ステナイト状態で加工できることによるも
のである。As shown in FIG. 2, in the case of the processing method shown in FIG. 1(B), the deformation resistance is smaller and the reduction rate is also larger than that in the processing method shown in FIG. 1(B). This is (a)
In the case of the processing method (2), the steel material is processed in the martensite state, whereas in the case of the method (2), the steel material can be processed in the austenitic state.
【００２１】このように本発明によれば例えば３００℃
程度の低い温度での加工が可能であって加工性も良好で
あり、加工中に材料割れ等の不具合を発生しない。また
低い温度で加工を行うためにその後の冷却時に寸法変化
が少ない。即ち精密加工が可能となるのであり、加えて
低い温度での加工であるので表面に発生するスケールも
少なく抑えることができる。[0021] According to the present invention, for example, 300°C
It can be processed at moderately low temperatures, has good workability, and does not cause problems such as material cracking during processing. Furthermore, since the processing is performed at a low temperature, there is little dimensional change during subsequent cooling. In other words, precision machining becomes possible, and in addition, since the machining is performed at a low temperature, the amount of scale generated on the surface can be kept to a minimum.
【００２２】本願の別の発明は、温間領域における塑性
加工後、溶体化処理を施すことなくこれを直接時効処理
をするものであり、これによって従来の処理におけると
同等以上の特性を得ることができる。[0022] Another invention of the present application is that after plastic working in a warm region, this is directly aged without being subjected to solution treatment, thereby obtaining properties equivalent to or better than those obtained by conventional treatment. Can be done.
【００２３】上述したように析出硬化型のステンレス鋼
の場合、塑性加工後においてこれを１０５０℃程度の高
温まで昇温して溶体化処理し、しかる後急冷して焼入れ
し、その後４００〜５００℃程度の低い温度に昇温して
硬化元素を微細に析出させ若しくは析出直前の状態にも
ちきたす時効処理を施すのが従来行われている熱処理方
法である。As mentioned above, in the case of precipitation hardening stainless steel, after plastic working, it is heated to a high temperature of about 1050°C and subjected to solution treatment, then rapidly cooled and quenched, and then heated to a temperature of 400 to 500°C. A conventional heat treatment method is to perform an aging treatment in which the temperature is raised to a moderately low temperature to finely precipitate hardening elements or bring them to a state immediately before precipitation.
【００２４】しかるに本発明ではこの溶体化処理を省略
して直接に時効処理を行うのであり、これによって十分
な硬さ，強度が得られることが確認されている。However, in the present invention, this solution treatment is omitted and the aging treatment is directly performed, and it has been confirmed that sufficient hardness and strength can be obtained by this method.
【００２５】これはマルテンサイト系析出硬化型ステン
レス鋼の場合、１０５０℃といった高温からの急冷によ
らなくても、即ち３００℃程度の温間加工温度からの冷
却によっても、これを１０００℃程度の高温から急冷し
た場合と同様の組織（マルテンサイト組織）状態を得る
ことができるという事実を利用したものである。In the case of martensitic precipitation hardening stainless steel, it can be heated to about 1000°C without rapid cooling from a high temperature of about 1050°C, that is, even by cooling from a warm working temperature of about 300°C. This takes advantage of the fact that a similar structure (martensitic structure) can be obtained when rapidly cooling from a high temperature.
【００２６】[0026]
【実施例】次に本発明の特徴を更に明確にすべく、以下
にその実施例を詳述する。
［実施例１］鋼材としてＳＵＳ６３０を用い、これを表
１に示す処理手順に従い且つ図３に示す工程（工程（Ｉ
）→（ＩＶ））で棒材１０からＭ１０ボルト１２を製造
し、その硬さを測定した。尚表中ＳＴとあるのは溶体化
処理で、ＡＧとあるのは時効処理である。それぞれの条
件は、
ＳＴ：１０５０℃で３０分保持した後空冷ＡＧ：４８０
℃で一時間保持した後空冷とした。EXAMPLES Next, in order to further clarify the characteristics of the present invention, examples thereof will be described in detail below. [Example 1] SUS630 was used as the steel material, and it was processed according to the treatment procedure shown in Table 1 and the process (step (I) shown in FIG.
)→(IV)) An M10 bolt 12 was manufactured from the bar 10, and its hardness was measured. In the table, ST indicates solution treatment, and AG indicates aging treatment. The conditions for each are ST: 1050°C for 30 minutes, then air cooling AG: 480°C.
After being kept at ℃ for 1 hour, it was air cooled.
【００２７】[0027]
【表１】[Table 1]
【００２８】この表から分かるように冷材を直接３００
℃まで加熱して温間鍛造した場合（比較例■）には実際
上加工ができなかったのに対して、一旦１０５０℃まで
加熱した後２００℃以上の温度に降温して加工した場合
（実施例）、加工が容易に行い得、また加工後に溶体化
処理を行うことなく直接時効処理した場合でも従来の一
般的な加工処理方法（比較例■）による場合と同等以上
の硬さを得ることができた。尚比較例■に示してあるの
が従来の一般的な温間加工方法とされるもので、この場
合には溶体化処理が必須である。As can be seen from this table, the cold material is directly
In the case of warm forging by heating to 1050℃ (comparative example ■), it was practically impossible to process, whereas in the case of heating to 1050℃ and then lowering the temperature to 200℃ or higher for processing (implementation). Example), it is easy to process, and even if it is directly aged without solution treatment after processing, it can obtain hardness equivalent to or higher than that obtained by conventional general processing methods (comparative example ■). was completed. Comparative Example (3) is a conventional general warm working method, and in this case, solution treatment is essential.
【００２９】［実施例２］鋼材としてＳＵＳ６３０を用
い、これを１０５０℃に加熱して表２に示す各時間保持
し、その後３００℃まで降温してグリーブル試験を行い
、変形抵抗，絞り率を測定した。結果が同表に併せて示
してある。[Example 2] Using SUS630 as the steel material, it was heated to 1050°C and held for each time shown in Table 2, and then lowered to 300°C and subjected to a Greeble test to measure deformation resistance and reduction ratio. did. The results are also shown in the same table.
【００３０】[0030]
【表２】[Table 2]
【００３１】この表から、極めて短時間の保持でも十分
特性を発現させ得ることが分かる[0031] From this table, it can be seen that the characteristics can be sufficiently expressed even when held for an extremely short time.
【００３２】［実施例３］ＳＵＳ６３０を１０５０℃ま
で加熱してオーステナイト化した後Ｍｓ点以上の３００
℃まで降温して同温度で塑性加工（グリ−ブル試験）を
行い、冷却後４８０×１時間保持，その後空冷の条件で
時効処理を施した。結果が従来の加工処理方法との比較
において表３に示してある。[Example 3] After heating SUS630 to 1050°C to austenite,
The temperature was lowered to .degree. C., and plastic working (Greeble test) was performed at the same temperature. After cooling, the material was held at 480 x 1 hour, and then aged under conditions of air cooling. The results are shown in Table 3 in comparison with conventional processing methods.
【００３３】[0033]
【表３】[Table 3]
【００３４】この表から分かるように本発明に従って加
工処理を行った場合、加工後別途に溶体化処理を行わな
くても従来と同等ないしそれ以上の特性を発現させるこ
とができる。As can be seen from this table, when the processing according to the present invention is carried out, properties equivalent to or better than those of the conventional method can be obtained without a separate solution treatment after processing.
【００３５】以上本発明の実施例を詳述したが、これは
あくまで一例示であって、本発明はＳＵＳ６３１その他
のマルテンサイト系析出硬化型ステンレス鋼にも適用可
能であるなど、その主旨を逸脱しない範囲において、当
業者の知識に基づき様々な変更を加えた態様で実施可能
である。Although the embodiments of the present invention have been described in detail above, this is merely an example, and the present invention may be applied to SUS631 and other martensitic precipitation hardening stainless steels, and may depart from the spirit thereof. The present invention can be implemented with various modifications based on the knowledge of those skilled in the art.
【図１】本発明の特徴を説明するために示した鋼材に対
する加工手順を具体的に表した図である。FIG. 1 is a diagram specifically showing a processing procedure for a steel material shown to explain the features of the present invention.
【図２】その加工方法の効果を示す図である。FIG. 2 is a diagram showing the effect of the processing method.
【図３】本発明の一実施例に従ってボルトを製造する際
の工程説明図である。FIG. 3 is an explanatory diagram of a process for manufacturing a bolt according to an embodiment of the present invention.
１０ 棒材 １２ ボルト 10 Bar material 12 bolts
Claims (2)
後Ｍｓ点以上の温間加工温度まで冷却して塑性加工を施
すことを特徴とするマルテンサイト系析出硬化型ステン
レス鋼の加工方法。1. A method for processing martensitic precipitation-hardening stainless steel, which comprises heating a material to a temperature of 1000° C. or higher and then cooling it to a warm working temperature of a Ms point or higher to perform plastic working.
後Ｍｓ点以上の温間加工温度まで冷却して塑性加工を施
し、その後これを冷却した後に別途溶体化処理を行うこ
となく時効処理することを特徴とするマルテンサイト系
析出硬化型ステンレス鋼の加工方法。[Claim 2] The material is once heated to 1000° C. or higher and then cooled to a warm working temperature of the Ms point or higher to perform plastic working, and then, after cooling, aging treatment is performed without separately performing solution treatment. A method for processing martensitic precipitation hardening stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3068974A JP2985338B2 (en) | 1991-03-07 | 1991-03-07 | Processing method of martensitic precipitation hardening stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3068974A JP2985338B2 (en) | 1991-03-07 | 1991-03-07 | Processing method of martensitic precipitation hardening stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04280918A true JPH04280918A (en) | 1992-10-06 |
| JP2985338B2 JP2985338B2 (en) | 1999-11-29 |
Family
ID=13389155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3068974A Expired - Fee Related JP2985338B2 (en) | 1991-03-07 | 1991-03-07 | Processing method of martensitic precipitation hardening stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2985338B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11335727A (en) * | 1998-05-15 | 1999-12-07 | Skf Gmbh | Production of hardened steel parts |
| US6478900B1 (en) | 1994-12-30 | 2002-11-12 | Diado Tokushuko Kabushiki Kaisha | Method of forging precipitation hardening type stainless steel |
| CN105458134A (en) * | 2015-11-17 | 2016-04-06 | 攀钢集团江油长城特殊钢有限公司 | Forging method of tungsten-containing martensitic stainless steel |
-
1991
- 1991-03-07 JP JP3068974A patent/JP2985338B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6478900B1 (en) | 1994-12-30 | 2002-11-12 | Diado Tokushuko Kabushiki Kaisha | Method of forging precipitation hardening type stainless steel |
| JPH11335727A (en) * | 1998-05-15 | 1999-12-07 | Skf Gmbh | Production of hardened steel parts |
| CN105458134A (en) * | 2015-11-17 | 2016-04-06 | 攀钢集团江油长城特殊钢有限公司 | Forging method of tungsten-containing martensitic stainless steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2985338B2 (en) | 1999-11-29 |
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