GB696883A - Improvements relating to the heat treatment of low alloy steels having high creep resistance - Google Patents
Improvements relating to the heat treatment of low alloy steels having high creep resistanceInfo
- Publication number
- GB696883A GB696883A GB23717/49A GB2371749A GB696883A GB 696883 A GB696883 A GB 696883A GB 23717/49 A GB23717/49 A GB 23717/49A GB 2371749 A GB2371749 A GB 2371749A GB 696883 A GB696883 A GB 696883A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- silicon
- carbon
- carbon content
- cooling
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
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 heat strength is imparted to low alloy pearlitic steels containing 0.6 per cent max. carbon, at least 0.7 per cent silicon and at least one of the following elements in the ranges given: 0.2 to 6 per cent chromium, 0.1 to 3 per cent molybdenum, 0.05 to 3 per cent vanadium, 0.01 to 3 per cent tungsten, titanium from 8 to 30 times the carbon content and niobium and/or tantalum up to 15 times the carbon content, the silicon content increasing with increased carbon content to a greater extent than the carbon content so that 0.6 per cent carbon corresponds to at least 3 per cent silicon, by heating to the austenite field and at least to 900 DEG C and cooling in such a manner that the austenite is completely or substantially completely converted within a temperature range lying above the martensite but below the pearlite-forming range. The alloy may include at least one of the elements tungsten, titanium, tantalum and/or niobium and at least one of the elements chromium, molybdenum, and vanadium. The cooling may be carried out in steps, e.g. 1000-1100 DEG C to 600-700 DEG C and then to room temperature. It is stated that the rate of cooling depends to some extent on the silicon content.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE696883X | 1948-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB696883A true GB696883A (en) | 1953-09-09 |
Family
ID=20315349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23717/49A Expired GB696883A (en) | 1948-09-14 | 1949-09-14 | Improvements relating to the heat treatment of low alloy steels having high creep resistance |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB696883A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3291655A (en) * | 1964-06-17 | 1966-12-13 | Gen Electric | Alloys |
| FR2461183A1 (en) * | 1979-07-10 | 1981-01-30 | Pont A Mousson | Centrifugally cast steel pipe for transporting wet abrasive material - has high war resistance and low hardness |
| EP0133959A1 (en) * | 1983-08-02 | 1985-03-13 | Nissan Motor Co., Ltd. | Case hardening steel suitable for high temperature carburizing |
| GB2203754A (en) * | 1987-04-21 | 1988-10-26 | Weld Mold Co | Method of welding and product obtained therefrom |
-
1949
- 1949-09-14 GB GB23717/49A patent/GB696883A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3291655A (en) * | 1964-06-17 | 1966-12-13 | Gen Electric | Alloys |
| FR2461183A1 (en) * | 1979-07-10 | 1981-01-30 | Pont A Mousson | Centrifugally cast steel pipe for transporting wet abrasive material - has high war resistance and low hardness |
| EP0133959A1 (en) * | 1983-08-02 | 1985-03-13 | Nissan Motor Co., Ltd. | Case hardening steel suitable for high temperature carburizing |
| US4773947A (en) * | 1983-08-02 | 1988-09-27 | Nissan Motor Co., Ltd. | Manufacturing process for high temperature carburized case harden steel |
| GB2203754A (en) * | 1987-04-21 | 1988-10-26 | Weld Mold Co | Method of welding and product obtained therefrom |
| GB2203754B (en) * | 1987-04-21 | 1991-07-31 | Weld Mold Co | Method of welding and product obtained therefrom |
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