JPS6280225A - Manufacture of maraging steel sheet - Google Patents
Manufacture of maraging steel sheetInfo
- Publication number
- JPS6280225A JPS6280225A JP22129285A JP22129285A JPS6280225A JP S6280225 A JPS6280225 A JP S6280225A JP 22129285 A JP22129285 A JP 22129285A JP 22129285 A JP22129285 A JP 22129285A JP S6280225 A JPS6280225 A JP S6280225A
- Authority
- JP
- Japan
- Prior art keywords
- maraging steel
- cold working
- steel sheet
- manufacture
- maraging
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、マルエージング鋼薄板の製造方法、特に高疲
労強度を有するマルエージング鋼薄板の製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a maraging steel sheet, and in particular to a method for manufacturing a maraging steel sheet having high fatigue strength.
（従来の技術）
マルエージング鋼は、高強度でかつ高靭性を有し、しか
も塑性加工性、溶接性等に優れているところから、航空
機部品、原子力関連装置、自動車部品等に広く利用され
ている。(Prior art) Maraging steel has high strength and toughness, as well as excellent plastic workability and weldability, so it is widely used in aircraft parts, nuclear power-related equipment, automobile parts, etc. There is.
例えば、自動車部品である無段変速機（ＣｖＴ）には回
転力伝達手段として薄板のスチールベルトが用いられて
いるが、該スチールベルトには極めて高い強度と靭性と
が要求されるため、これにマルエージング鋼を使用する
場合が多い。For example, continuously variable transmissions (CvT), which are automobile parts, use thin steel belts as a means of transmitting rotational force, but these steel belts are required to have extremely high strength and toughness. Maraging steel is often used.
（発明が解決しようとする問題点）
ところで、上記スチールベルトは、使用条件がますます
過酷になる傾向にあり、こ杵に伴なって強度と靭性以外
に、高い疲労強度と耐摩耗性とが要求されるようになっ
てきている。このため従来、該スチールベルトを製造す
るに、溶体化処理済のマルエージング鋼素板を冷間加工
により薄肉化（サイズダウン）し、最終表面硬化処理（
通常、軟窒化処理）を施して仕上げる方法を採っていた
。(Problems to be Solved by the Invention) By the way, the above-mentioned steel belts tend to be used under increasingly harsh conditions, and with this punch, in addition to strength and toughness, high fatigue strength and wear resistance are required. It is becoming more and more required. For this reason, conventionally, to manufacture steel belts, solution-treated maraging steel blanks are made thinner (down in size) by cold working, and then subjected to final surface hardening (
Usually, the finishing method was to apply soft nitriding treatment.
しかしながら、上記表面硬化処理を含む従来の製造方法
によってもなお、満足する疲労強度が得られていないの
が現状で、より疲労強度の高いマルエージング鋼スチー
ルベルトの実現が望まれていた。However, even with the conventional manufacturing method including the above-mentioned surface hardening treatment, it is still not possible to obtain a satisfactory fatigue strength, and it has been desired to realize a maraging steel belt with even higher fatigue strength.
本発明は、上記現状に鑑みてなされたもので、その目的
とするところは、高疲労強度を有するマルエージング鋼
薄板の提供を可能とすることにある。The present invention has been made in view of the above-mentioned current situation, and its object is to make it possible to provide a maraging steel thin plate having high fatigue strength.
（問題点を解決するための手段）
このため、本発明は、マルエージング鋼素板を冷間加工
により薄肉化し、その冷間加工の後半または該冷間加工
の終了後に溶体化処理を行ない、しかる後に軟窒化処理
を施すようにしたことを特徴とする。(Means for Solving the Problems) Therefore, the present invention reduces the thickness of a maraging steel blank by cold working, and performs solution treatment in the latter half of the cold working or after the end of the cold working, It is characterized in that a soft nitriding treatment is performed after that.
（作用）
上記のごとく構成したマルエージング鋼薄板の製造にお
いて、冷間加工の後半または該冷間加工後に溶体化処理
を行なうようにしたことにより、冷間加工の影響が可及
的に除去され、後の軟窒化処理により薄板の表面圧縮残
留応力が増大し、結果的に該薄板の疲労強度が向上する
ようになる。(Function) In manufacturing the maraging steel sheet configured as described above, by performing solution treatment in the latter half of cold working or after the cold working, the influence of cold working is removed as much as possible. The surface compressive residual stress of the thin plate is increased by the subsequent nitrocarburizing treatment, and as a result, the fatigue strength of the thin plate is improved.
（実施例） 以下、本発明の実施例を添付図面も参照して説明する。(Example) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
２５Ｏｋｓｉ級のマルエージング鋼素板を巻いてエンド
レスベルト半製品を得、これに後述する所定のタイミン
グで８３０℃×３０分の溶体化処理を施しつ一１全体で
４０％の冷間加工（引張り成形）を加えて、０．２＋＋
＋ｍ厚さ×１０ＩＩＩＩ幅Ｘ １８０ａ＋ｍの寸法を有
するエンドレスベルト製品を形成し、その後５７０℃×
１０分のタフトライド処理を施した。前記溶体化処理を
施すタイミングは、該溶体化処理後の冷間加工率で表し
、■０％（冷間加工前）、０１０％、■２０％、０３０
％、０４０％（冷間加工後）となるようにした。また前
記の工程後、各エンドレスベルト製品を後述する表面残
留応力測定と疲労試験に供した。A semifinished endless belt is obtained by winding a 25Oksi grade maraging steel blank, which is then subjected to solution treatment at 830°C for 30 minutes at a predetermined timing to be described later. molding), 0.2++
+m thickness x 10III width x 180a+m to form an endless belt product with dimensions, then 570℃ x
Tuftride treatment was performed for 10 minutes. The timing of applying the solution treatment is expressed by the cold working rate after the solution treatment, and is: 0% (before cold working), 010%, 20%, 030
%, 040% (after cold working). Further, after the above steps, each endless belt product was subjected to surface residual stress measurement and fatigue test described below.
残留応力の測定は、Ｘ線法によった。第１図はその結果
を示したもので、これより、溶体化処理後の冷間加工率
の増大にしたがい、表面残留応力が低下することが確認
できた。The residual stress was measured by the X-ray method. FIG. 1 shows the results, from which it was confirmed that the surface residual stress decreased as the cold working rate increased after the solution treatment.
一方疲労試験は、第２図に示すように、本エンドレスベ
ルトｌを径の異る２つのローラ２゜３に巻回し、引張荷
重Ｐをかけながら回転させる方法によった。第３図はそ
の結果を示したもので、これより、溶体化処理後の冷間
加工率の増大にしたがい、疲労強度が低下することが確
認できた。On the other hand, the fatigue test was carried out by a method in which the endless belt 1 was wound around two rollers 2.degree. 3 of different diameters and rotated while applying a tensile load P, as shown in FIG. FIG. 3 shows the results, from which it was confirmed that fatigue strength decreased as the cold working rate increased after solution treatment.
すなわち、冷間加工の後半または冷間加工後に溶体化処
理を行って冷間加工の影響を可及的に取除くことが、軟
窒化処理による表面圧縮残留応力の増大に極めて有効で
、結果として、疲労強度の向上を達成し得ることが明ら
かとなった。In other words, performing solution treatment in the latter half of cold working or after cold working to remove the effects of cold working as much as possible is extremely effective in increasing the surface compressive residual stress caused by soft nitriding. It has become clear that improvement in fatigue strength can be achieved.
なお、本発明は上記実施例におけるエンドレスベルトの
製造に留まらず、各種薄板の製造に適用できることはも
ちろんである。It should be noted that the present invention is not limited to the production of the endless belt in the above embodiments, but can of course be applied to the production of various thin plates.
（発明の効果）
以上、詳細に説明したように、本発明は冷間加工の後半
または冷間加工後に溶体化処理を行い、しかる後に軟窒
化処理を施すことによりマルエージング鋼薄板を製造す
るようにしたので、冷間加工の影響を除去できて、疲労
強度の可及的向上を達成することが可能になった。(Effects of the Invention) As explained above in detail, the present invention is capable of manufacturing a maraging steel sheet by performing solution treatment in the latter half of cold working or after cold working, and then performing nitrocarburizing treatment. As a result, the influence of cold working can be removed and fatigue strength can be improved as much as possible.
第１図は表面圧縮残留応力測定結果を示す相関図、第２
図は疲労試験の実行態様を示す模式図、第３図は疲労試
験結果を示す相関図である。
第１図
：＋間加工阜（１）
第２図
第３図
繰り 辺し数 （回）Figure 1 is a correlation diagram showing the measurement results of surface compressive residual stress, Figure 2
The figure is a schematic diagram showing how the fatigue test is carried out, and FIG. 3 is a correlation diagram showing the fatigue test results. Fig. 1: + machining area (1) Fig. 2 Fig. 3 Machining number of edges (times)
Claims (1)
、その冷間加工の後半または該冷間加工の終了後に溶体
化処理を行ない、しかる後に軟窒化処理を施すことを特
徴とするマル エージング鋼薄板の製造方法。(1) Maraging Maraging characterized by thinning a steel plate by cold working, subjecting it to solution treatment in the latter half of the cold working or after the end of the cold working, and then subjecting it to nitrocarburizing treatment. Method for manufacturing thin steel sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60221292A JPH0621338B2 (en) | 1985-10-04 | 1985-10-04 | Method of manufacturing thin maraging steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60221292A JPH0621338B2 (en) | 1985-10-04 | 1985-10-04 | Method of manufacturing thin maraging steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6280225A true JPS6280225A (en) | 1987-04-13 |
| JPH0621338B2 JPH0621338B2 (en) | 1994-03-23 |
Family
ID=16764499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60221292A Expired - Lifetime JPH0621338B2 (en) | 1985-10-04 | 1985-10-04 | Method of manufacturing thin maraging steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0621338B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6767414B2 (en) * | 1999-12-24 | 2004-07-27 | Hitachi Metals, Ltd. | Maraging steel having high fatigue strength and maraging steel strip made of same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5410221A (en) * | 1977-06-27 | 1979-01-25 | Hitachi Ltd | Thermomechanical treating method for maraging steel |
-
1985
- 1985-10-04 JP JP60221292A patent/JPH0621338B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5410221A (en) * | 1977-06-27 | 1979-01-25 | Hitachi Ltd | Thermomechanical treating method for maraging steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6767414B2 (en) * | 1999-12-24 | 2004-07-27 | Hitachi Metals, Ltd. | Maraging steel having high fatigue strength and maraging steel strip made of same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0621338B2 (en) | 1994-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1055738B1 (en) | Method of manufacturing laminated ring and heat treatment apparatus for use in such method | |
| JPS61116145A (en) | Endless metallic brlt | |
| DE102007035846A1 (en) | Apparatus and method for amplifying gear teeth | |
| EP0372076A4 (en) | Method of producing directional silicon steel sheet having excellent magnetic characteristics and continuous intermediate annealing equipment | |
| JPS6280225A (en) | Manufacture of maraging steel sheet | |
| JPS5871336A (en) | Production of high-strength austenitic stainless steel plate having excellent fatigue characteristic | |
| DE102004006284B4 (en) | Circumferential length adjuster and peripheral length adjustment method for an endless metal ring | |
| CN102015148A (en) | Manufacturing method for a drive belt ring component | |
| JPH11230312A (en) | High contact fatigue lifetime gear and manufacture thereof | |
| JPS6280322A (en) | Endless steel belt and manufacture thereof | |
| JPH11200010A (en) | Surface treatment of metallic multilayered belt for automobile | |
| CN110180904A (en) | A kind of phosphorous BH steel Surfaces of Hot Rolled Strip point defects controlling method of Ultra-low carbon | |
| JPS60166139A (en) | Manufacture of spur gear | |
| JPS63230242A (en) | Forging method | |
| JPH02149621A (en) | Manufacture of synchronizer sleeve | |
| JPS5690972A (en) | Production of high strength steel | |
| JPH0717998B2 (en) | Surface treatment method for endless metal belt | |
| WO2013132575A1 (en) | Machined part manufacturing method and machined part | |
| JPH0558055B2 (en) | ||
| JPH03189043A (en) | Manufacture of torsion bar for power steering device | |
| JPS57165115A (en) | Processing method for steel plate | |
| JPH0310417B2 (en) | ||
| JP3618587B2 (en) | Method for manufacturing cold-rolled ring from special steel and special steel cold-rolled ring manufactured by the method | |
| JPH03107418A (en) | Production of gear | |
| Broglie et al. | Gear hardness technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |