JPS5653864A - Production of low-temperature steel casting - Google Patents
Production of low-temperature steel castingInfo
- Publication number
- JPS5653864A JPS5653864A JP12850879A JP12850879A JPS5653864A JP S5653864 A JPS5653864 A JP S5653864A JP 12850879 A JP12850879 A JP 12850879A JP 12850879 A JP12850879 A JP 12850879A JP S5653864 A JPS5653864 A JP S5653864A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- casting
- cooling
- bainite
- freezing
- 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.)
- Pending
Links
Landscapes
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
PURPOSE: To prevent cracking at the casting and improve low-temperature toughness in particular by pouring cast steel contg. the specific amount of Ni and performing knock-out immediately after the completion of freezing and cooling the same as quickly as possible up to just above the transformation temperature of bainite.
CONSTITUTION: Steel contg. 8.5W12% Ni is cast and immediately after the completion of freezing, knock-out is performed and the casting is quickly cooled to just above the transformation temperature of bainite. The subsequent cooling is accomplished slowly or a time exceeding 100hr or at cooling rates of ≤3°C/hr. In the case of products requiring stringent mechanical properties such as machine parts for the LNG, the steel of 0.01W0.1wt% C, ≤0.15wt% Si, ≤0.9wt% Mn, 8.5W 12wt% Ni, 0.15W0.5wt% one or two kinds of Mo, W, and Fe for the remainder in the composition of target steel is used.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12850879A JPS5653864A (en) | 1979-10-04 | 1979-10-04 | Production of low-temperature steel casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12850879A JPS5653864A (en) | 1979-10-04 | 1979-10-04 | Production of low-temperature steel casting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5653864A true JPS5653864A (en) | 1981-05-13 |
Family
ID=14986472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12850879A Pending JPS5653864A (en) | 1979-10-04 | 1979-10-04 | Production of low-temperature steel casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5653864A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5651520A (en) * | 1979-10-03 | 1981-05-09 | Sumitomo Metal Ind Ltd | Production of low-temperature-service steel casting |
-
1979
- 1979-10-04 JP JP12850879A patent/JPS5653864A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5651520A (en) * | 1979-10-03 | 1981-05-09 | Sumitomo Metal Ind Ltd | Production of low-temperature-service steel casting |
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