GB547107A - Improvements in production of malleable iron - Google Patents
Improvements in production of malleable ironInfo
- Publication number
- GB547107A GB547107A GB4168/41A GB416841A GB547107A GB 547107 A GB547107 A GB 547107A GB 4168/41 A GB4168/41 A GB 4168/41A GB 416841 A GB416841 A GB 416841A GB 547107 A GB547107 A GB 547107A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hours
- iron
- heated
- cast iron
- hour
- 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
- C21D5/00—Heat treatments of cast-iron
- C21D5/02—Heat treatments of cast-iron improving the malleability of grey cast-iron
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)
- Hard Magnetic Materials (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Abstract
547,107. Heat-treating cast iron. ELECTRO METALLURGICAL CO. March 28, 1941, No. 4168. Convention date, May 9, 1940. [Class 72] To improve the responsiveness of white cast iron to the subsequent annealing treatment to produce malleable iron, the iron is first heated to 100-400‹C. for a period of 10-200 hours, e.g. at 130‹C. or 245‹C. for 65 hours. The heated iron may be subsequently held at malleabilising temperatures to produce temper carbon. In an example a cast iron containing 2.54 per cent. of combined carbon and 0.06 graphite, 0.65 of silicon, 0.42 of manganese, 0.04 of sulphur and 0.12 of phosphorus was heated for 65 hours at 245‹C. and then subjected to an annealing comprising heating to 955‹C. for 1 hour and holding it there for 4 hours, cooling to 788‹C. in 1 hour and then to. 650‹C. in 9 hours.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US334167A US2227217A (en) | 1940-05-09 | 1940-05-09 | Production of malleable iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB547107A true GB547107A (en) | 1942-08-13 |
Family
ID=23305899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4168/41A Expired GB547107A (en) | 1940-05-09 | 1941-03-28 | Improvements in production of malleable iron |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2227217A (en) |
| FR (1) | FR871742A (en) |
| GB (1) | GB547107A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2595567A (en) * | 1949-08-24 | 1952-05-06 | Dayton Malleable Iron Co | Process for producing malleable iron castings |
| CH453715A (en) * | 1964-04-30 | 1968-03-31 | Teves Thompson Gmbh | Cast iron with high resistance to bending, wear and tear and heat, in particular for pistons, piston rings and valve seat inserts and processes for their production |
| WO2018180424A1 (en) | 2017-03-27 | 2018-10-04 | 日立金属株式会社 | Black heart malleable cast-iron and method for manufacturing same |
-
1940
- 1940-05-09 US US334167A patent/US2227217A/en not_active Expired - Lifetime
-
1941
- 1941-03-28 GB GB4168/41A patent/GB547107A/en not_active Expired
- 1941-04-24 FR FR871742D patent/FR871742A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR871742A (en) | 1942-05-07 |
| US2227217A (en) | 1940-12-31 |
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