US1844994A - Process for the manufacture of iron and steel - Google Patents
Process for the manufacture of iron and steel Download PDFInfo
- Publication number
- US1844994A US1844994A US254899A US25489928A US1844994A US 1844994 A US1844994 A US 1844994A US 254899 A US254899 A US 254899A US 25489928 A US25489928 A US 25489928A US 1844994 A US1844994 A US 1844994A
- Authority
- US
- United States
- Prior art keywords
- manufacture
- steel
- iron
- ageing
- toughness
- 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 - Lifetime
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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
Definitions
- This invention relates to a process for the manufacture of iron and steel and has for its ployed in the manufacture of. steam boilers,
- ageing of said cold deformed articles further reduces the toughness and tenacity thereof. This reduction of toughness may be observed by means of the impact test on a notched bar.
- a process for the manufacture of mild or hard steel insensible against cold deformation and ageing characterized by the fact that the material in the course of its working is deformed as extensively as possible at temperatures lying below its ii -transformationpoint, the deforming process beginn ng 1 mmediately below the Ar oint and being imished as quickly as possi le, after which operation the material is subjected to a normalizing annealing treatment HERMAN JOHAN VAN ROYEN.
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)
- Forging (AREA)
Description
'PatentedFeb. 16, 1932 UNITED STATES PATENT OFFICE I JOHAH VA! BOYEN, OF HOBDE, GERMANY, ASSIGNOR TO FIRM VEREINIG'IE STABL .AKTIENGESELLSCHAFT, OF DUSSELDOBF, GERMANY rnocnss FOR THE H ANUFACI'UBE OF IRON AND STEEL 17o Drawing. Application iiled February 18, 1828, Serial No. 254,899, and in Germany February 21, 1927.
This invention relates to a process for the manufacture of iron and steel and has for its ployed in the manufacture of. steam boilers,
oiler tubes and the like but with the steels hitherto in use this treatment has as a result a reduction in toughness.
It may further be noted that ageing of said cold deformed articles further reduces the toughness and tenacity thereof. This reduction of toughness may be observed by means of the impact test on a notched bar.
Metallurgists have long been striving to obtain a material which does not have the aforementioned undesirable and unfavorable properties. Up to the present time, however, they have not been able to produce an article whlch has been subjected to cold deformation, in which the brittleness produced thereby has been confined to tolerable limits and in which the increase of brittleness caused by ageing These results are obtained by virtue of the fact that the working process consists in a deformation operation, rolling, forging or pressing, which is continued to the greatest extent possible at a temperature which is below the Ar point. Thi deformation takes place preferably immediately below said Ar point since in the range disposable at these temperatures the material may be deformed to the greatest extent. The next step consis't-s in a normalizing annealing operatlon carried out at a temperature somewhat above the Ac point. The last operation is cooling in the am What I claim is:
A process for the manufacture of mild or hard steel insensible against cold deformation and ageing characterized by the fact that the material in the course of its working is deformed as extensively as possible at temperatures lying below its ii -transformationpoint, the deforming process beginn ng 1 mmediately below the Ar oint and being imished as quickly as possi le, after which operation the material is subjected to a normalizing annealing treatment HERMAN JOHAN VAN ROYEN.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1844994X | 1927-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1844994A true US1844994A (en) | 1932-02-16 |
Family
ID=7745737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US254899A Expired - Lifetime US1844994A (en) | 1927-02-21 | 1928-02-16 | Process for the manufacture of iron and steel |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1844994A (en) |
-
1928
- 1928-02-16 US US254899A patent/US1844994A/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1844994A (en) | Process for the manufacture of iron and steel | |
| JP2861024B2 (en) | Martensitic stainless steel for oil well and its production method | |
| JPH0325253B2 (en) | ||
| US3309238A (en) | Deep drawing of stainless steels, and steel therefor | |
| US3201288A (en) | Method of treating steel to produce a fine-grained condition | |
| US2266952A (en) | Stainless steel treatment and product | |
| US2881108A (en) | Annealed, cold-finished steels | |
| SU508560A1 (en) | Die steel | |
| US2378300A (en) | Method of heat treating alloy steel | |
| US1941101A (en) | Process for producing a steel having a lesser tendency to blue fracture and brittleness due to ageing | |
| JPH0233773B2 (en) | YUSEIYOATSUPUSETSUTOKOKANNOSEIZOHO | |
| US2486282A (en) | Heat-treatment for high carbon high chromium steel | |
| SU1731839A1 (en) | Method of thermal and mechanical treatment of products | |
| GB311337A (en) | Process for the manufacture of articles, particularly screws and rivets, by upsetting in the cold | |
| US2359692A (en) | Alloy | |
| FI83045C (en) | Process for producing cylinder pipes intended for use in temperatures of -40 ° C and use of steel in cylinder pipes | |
| US2360271A (en) | Alloy steel article | |
| SU298685A1 (en) | ||
| US1851903A (en) | Heat treatment of cold shaped manganese steel articles | |
| AT166035B (en) | Material for the production of deep-drawn objects | |
| SU241684A1 (en) | ||
| SU306184A1 (en) | MARTENSITE AND OLD STEEL | |
| SU1629346A1 (en) | Steel for rolls | |
| SU55345A1 (en) | High-speed chrome-molybdenum-vanadium steel | |
| AT145078B (en) | Process for increasing the corrosion resistance of alloys of aluminum with about 3 to 16% magnesium. |