GB846477A - Improvements in or relating to the manufacture of thin iron castings - Google Patents
Improvements in or relating to the manufacture of thin iron castingsInfo
- Publication number
- GB846477A GB846477A GB5920/57A GB592057A GB846477A GB 846477 A GB846477 A GB 846477A GB 5920/57 A GB5920/57 A GB 5920/57A GB 592057 A GB592057 A GB 592057A GB 846477 A GB846477 A GB 846477A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- casting
- iron
- relating
- manufacture
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 238000005266 casting Methods 0.000 abstract 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 229910001018 Cast iron Inorganic materials 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 2
- 229910052804 chromium Inorganic materials 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 2
- 229910052802 copper Inorganic materials 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract 2
- 229910052759 nickel Inorganic materials 0.000 abstract 2
- 238000005496 tempering Methods 0.000 abstract 2
- 229910052719 titanium Inorganic materials 0.000 abstract 2
- 230000001131 transforming effect Effects 0.000 abstract 2
- 229910052726 zirconium Inorganic materials 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910001566 austenite Inorganic materials 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 229910002804 graphite Inorganic materials 0.000 abstract 1
- 239000010439 graphite Substances 0.000 abstract 1
- 238000005087 graphitization Methods 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 229910000734 martensite Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 230000006911 nucleation Effects 0.000 abstract 1
- 238000010899 nucleation Methods 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
A process for heat treating cast iron castings of at most 20mm thickness and containing at least one element which slows down the transformation of the iron selected from Cu, Ni, Ti, Al, Zr, Cr and Mo comprises rapidly cooling the casting from the casting temperature to room temperature, transforming the residual austentite to martensite by treatment at a temperature, transforming the residual austenite with nucleation of the graphite, and effecting graphitization at a temperature higher than the tempering temperature. The casting may be quenched from 800 DEG C. in a liquid medium and then treated in liquid nitrogen, followed by tempering at 440-450 DEG C., cooling in still air, and graphitizing at 875-890 DEG C The cast iron may have the following analysis: 1.18-3.5% C: 1-3% Si: 0.6-2% Mn: 0-3% Cu: 0-3% Ni: 0.05-0.15% S+P: 0-0.15% Ti: 0-0.15% Al: 0-0.3% Zr: 0-0.25% Cr: 0-0.20% Mo: the balance being iron.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR846477X | 1956-03-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB846477A true GB846477A (en) | 1960-08-31 |
Family
ID=9313349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5920/57A Expired GB846477A (en) | 1956-03-16 | 1957-02-21 | Improvements in or relating to the manufacture of thin iron castings |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB846477A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1533337B1 (en) * | 1965-09-20 | 1972-03-16 | Quebec Iron Foundries Ltd | ALLOY WHITE CAST IRON |
-
1957
- 1957-02-21 GB GB5920/57A patent/GB846477A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1533337B1 (en) * | 1965-09-20 | 1972-03-16 | Quebec Iron Foundries Ltd | ALLOY WHITE CAST IRON |
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