GB999866A - Heat treatment of high speed steel - Google Patents
Heat treatment of high speed steelInfo
- Publication number
- GB999866A GB999866A GB795264A GB795264A GB999866A GB 999866 A GB999866 A GB 999866A GB 795264 A GB795264 A GB 795264A GB 795264 A GB795264 A GB 795264A GB 999866 A GB999866 A GB 999866A
- Authority
- GB
- United Kingdom
- Prior art keywords
- martensite
- temperature
- high speed
- steel
- austenitization
- 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.)
- Expired
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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
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)
Abstract
High speed tool steel containing in percentage by weight .C.0.55-1.6 .Cr.3.5-5.5 .W.5-24 .Co.0-14 .V.0.75-6 .Mo.0-8 .Fe.balance is heated to effect austenitization and is then quenched at a rate sufficient to prevent pearlite formation to a transformation temperature within \sB5 DEG C. of the temperature where the bainite nose touches a vertical tangent. The steel is held for sufficient time to bring about an isothermal transformation resulting in the formation of 7-13% of bainite, is then quenched to below -80 DEG C. and is held there to transform at least 95% of the remaining austenite to martensite. The steel is heated to temper the martensite and may then be reheated to temper any martensite formed during the first tempering step. Tempering may be carried out at 550 DEG C. in each case. The initial austenitization is preferably brought about in three stages; equalization at 500-550 DEG C.; at least two hours at 780-850 DEG C. after equalization at that temperature; up to one hour at 1150-1330 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB795264A GB999866A (en) | 1964-02-26 | 1964-02-26 | Heat treatment of high speed steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB795264A GB999866A (en) | 1964-02-26 | 1964-02-26 | Heat treatment of high speed steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB999866A true GB999866A (en) | 1965-07-28 |
Family
ID=9842938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB795264A Expired GB999866A (en) | 1964-02-26 | 1964-02-26 | Heat treatment of high speed steel |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB999866A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2325006A (en) * | 1997-05-08 | 1998-11-11 | Po Hang Iron & Steel | High speed tool steel and manufacturing method therefor. |
| EP2662460A1 (en) * | 2012-05-07 | 2013-11-13 | Valls Besitz GmbH | Tough bainitic heat treatments on steels for tooling |
-
1964
- 1964-02-26 GB GB795264A patent/GB999866A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2325006A (en) * | 1997-05-08 | 1998-11-11 | Po Hang Iron & Steel | High speed tool steel and manufacturing method therefor. |
| GB2325006B (en) * | 1997-05-08 | 2001-12-05 | Po Hang Iron & Steel | High speed tool steel, and manufacturing method therefor |
| EP2662460A1 (en) * | 2012-05-07 | 2013-11-13 | Valls Besitz GmbH | Tough bainitic heat treatments on steels for tooling |
| WO2013167628A1 (en) * | 2012-05-07 | 2013-11-14 | Valls Besitz Gmbh | Tough bainitic heat treatments on steels for tooling |
| CN104271775A (en) * | 2012-05-07 | 2015-01-07 | 沃斯贝茨公司 | Tough bainitic heat treatments on steels for tooling |
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