GB1350784A - Method of processing a steel material to provide a high austenitic grain coarsening temperature - Google Patents
Method of processing a steel material to provide a high austenitic grain coarsening temperatureInfo
- Publication number
- GB1350784A GB1350784A GB2710371*A GB2710371A GB1350784A GB 1350784 A GB1350784 A GB 1350784A GB 2710371 A GB2710371 A GB 2710371A GB 1350784 A GB1350784 A GB 1350784A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- heated
- steel
- minutes
- grain
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 6
- 239000010959 steel Substances 0.000 title abstract 6
- 238000000034 method Methods 0.000 title abstract 2
- 239000000463 material Substances 0.000 title 1
- 238000001953 recrystallisation Methods 0.000 abstract 2
- 238000007670 refining Methods 0.000 abstract 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 229910001566 austenite Inorganic materials 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 150000004767 nitrides Chemical class 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 1
- 150000002910 rare earth metals Chemical class 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
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
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
1350784 Heat-treating steel KOBE SEISKOSHO KK [trading as KOBE STEEL Ltd] 19 April 1971 [15 April 1970] 27103/71 Heading C7A Cold - worked steel containing a grain-refining element is heated for at least 5 minutes to a temperature between that of ferrite recrystallization and A 3 to bring about recrystallization of the ferrite structure, and is then further heated to a temperature between A 3 and the austenitic grain coarsening temperature to produce a uniform austenitic structure. Prior to the above treatment the steel may be heated to above 1000 C possibly combined with hot working for at least 5 minutes to dissociate carbide nitride or oxide grain refining phases, cooled at more than 5C/minute to a temperature in the range 500-900C, heated to a temperature between 500 C and A 3 for over 5 minutes to re-precipitate those phases in finely despersed form, and then cold worked. Intermediate anneals during the latter operation are carried out below A 1 , while the final heating to the austenite range may include a carburization step. As exemplified the process is applied to steels containing by weight together with one or more of Al, Zr, Ti, V, Nb, Ta or a rare earth metal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP45032078A JPS5015209B1 (en) | 1970-04-15 | 1970-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1350784A true GB1350784A (en) | 1974-04-24 |
Family
ID=12348830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2710371*A Expired GB1350784A (en) | 1970-04-15 | 1971-04-19 | Method of processing a steel material to provide a high austenitic grain coarsening temperature |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3788903A (en) |
| JP (1) | JPS5015209B1 (en) |
| DE (1) | DE2118154A1 (en) |
| FR (1) | FR2089709A5 (en) |
| GB (1) | GB1350784A (en) |
| SE (1) | SE375798B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3928086A (en) * | 1974-12-02 | 1975-12-23 | Gen Motors Corp | High strength ductile steel |
| US3930907A (en) * | 1974-12-02 | 1976-01-06 | General Motors Corporation | High strength ductile hot rolled nitrogenized steel |
| JPS6037849B2 (en) * | 1979-07-12 | 1985-08-28 | 動力炉・核燃料開発事業団 | Decarburization-resistant treatment method for chromium-molybdenum steel |
-
1970
- 1970-04-15 JP JP45032078A patent/JPS5015209B1/ja active Pending
-
1971
- 1971-04-14 SE SE7104828A patent/SE375798B/xx unknown
- 1971-04-15 US US00134332A patent/US3788903A/en not_active Expired - Lifetime
- 1971-04-15 DE DE19712118154 patent/DE2118154A1/en active Pending
- 1971-04-15 FR FR7113354A patent/FR2089709A5/fr not_active Expired
- 1971-04-19 GB GB2710371*A patent/GB1350784A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2118154A1 (en) | 1971-11-04 |
| JPS5015209B1 (en) | 1975-06-03 |
| FR2089709A5 (en) | 1972-01-07 |
| SE375798B (en) | 1975-04-28 |
| US3788903A (en) | 1974-01-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |