GB625725A - Improvements in or relating to the production of malleable iron - Google Patents
Improvements in or relating to the production of malleable ironInfo
- Publication number
- GB625725A GB625725A GB1299745A GB1299745A GB625725A GB 625725 A GB625725 A GB 625725A GB 1299745 A GB1299745 A GB 1299745A GB 1299745 A GB1299745 A GB 1299745A GB 625725 A GB625725 A GB 625725A
- Authority
- GB
- United Kingdom
- Prior art keywords
- furnace
- carbon dioxide
- addition
- iron
- medium
- 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
- C21D5/04—Heat treatments of cast-iron of white cast-iron
- C21D5/06—Malleabilising
- C21D5/08—Malleabilising with oxidation of carbon
- C21D5/10—Malleabilising with oxidation of carbon in gaseous agents
Abstract
In a method of processing whiteheart malleable iron from white cast iron by heating it to a temperature above 85 DEG C. and below the melting point of iron, the white cast iron is heated in a substantially gas-tight furnace wherein the initial atmosphere of air is replaced during the heat-treatment, continuously or intermittently, by either water vapour or carbon dioxide or a mixture of both, the rate of replacement being so selected as to maintain an actively carburizing atmosphere in the furnace without any or excessive oxidation. The gaseous medium may pass through a circuit external to the furnace the addition of water and/or carbon dioxide being made before or simultaneously with its entry into the furnace or the medium may circulate only within the furnace the addition being made directly, thereto, in either case an amount of medium corresponding to the addition is withdrawn. The ratio of carbon dioxide to carbon monoxide is preferably maintained at 0.4. Specification 585,921 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1299745A GB625725A (en) | 1945-05-24 | 1945-05-24 | Improvements in or relating to the production of malleable iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1299745A GB625725A (en) | 1945-05-24 | 1945-05-24 | Improvements in or relating to the production of malleable iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB625725A true GB625725A (en) | 1949-07-04 |
Family
ID=10014938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1299745A Expired GB625725A (en) | 1945-05-24 | 1945-05-24 | Improvements in or relating to the production of malleable iron |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB625725A (en) |
-
1945
- 1945-05-24 GB GB1299745A patent/GB625725A/en not_active Expired
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