GB717164A - Improvements in or relating to hollow metal bodies - Google Patents
Improvements in or relating to hollow metal bodiesInfo
- Publication number
- GB717164A GB717164A GB12673/51A GB1267351A GB717164A GB 717164 A GB717164 A GB 717164A GB 12673/51 A GB12673/51 A GB 12673/51A GB 1267351 A GB1267351 A GB 1267351A GB 717164 A GB717164 A GB 717164A
- Authority
- GB
- United Kingdom
- Prior art keywords
- portions
- hardened
- bands
- spiral
- wall
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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 Articles (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
717,164. Pistons; cylinder liners. DEUTSCHE EDELSTAHLWERKE AKT.-GES. May 30, 1951 [Oct. 4, 1948; March 3, 1948; March 3, 1949], No. 12673/51. Class 122(1) [Also in Groups VIII and XXVIII] A hollow metal body 1, such as a cylinder liner or a piston, is subjected to a hardening treatment so that at least one surface of the wall of the body comprises hardened portions 2 spaced by relatively soft portions 3. The portions 2, 3 may be alternately arranged with respect to each other in the axial or circumferential direction of the body, or in both directions. The portions 2 may merge into the portions 3 and preferably extend through the full thickness of the wall of the body, and may be in the form of axially-spaced annular bands, Fig. 1, or spiral bands, Fig. 2 (not shown), or spiral bands of opposite pitch, Fig. 3 (not shown). The ends la, 1b of the body may be completely hardened or locally hardened in ring-like or spiral bands and surrounded by sleeves 4 of soft metal, e.g. steel. The hardened annular portions 2 may be produced by bringing the whole thickness of the wall of the body to the hardening temperature using an electric-induction coil or a gas burner surrounding the tube, the coil or burner being advanced in steps in the axial direction of the body which is quenched internally or externally; alternatively, a heating element only partly surrounding the body is used while the body is rotated. When hardened bands of spiral formation are required, a spiral-shaped heating element partly surrounds the body which is rotated and moved axially relatively to the element. The body may be given a heat treatment to produce a body with both faces having alternately arranged hardened and tempered portions, or one face may be completely hardened.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE717164X | 1948-10-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB717164A true GB717164A (en) | 1954-10-20 |
Family
ID=6626625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12673/51A Expired GB717164A (en) | 1948-10-04 | 1951-05-30 | Improvements in or relating to hollow metal bodies |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB717164A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2534629A1 (en) * | 1982-10-16 | 1984-04-20 | Daimler Benz Ag | CAST IRON CYLINDER FOR INTERNAL COMBUSTION ENGINES |
-
1951
- 1951-05-30 GB GB12673/51A patent/GB717164A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2534629A1 (en) * | 1982-10-16 | 1984-04-20 | Daimler Benz Ag | CAST IRON CYLINDER FOR INTERNAL COMBUSTION ENGINES |
GB2129093A (en) * | 1982-10-16 | 1984-05-10 | Daimler Benz Ag | Hardened cylinder wall for internal combustion engines |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB567304A (en) | An improved method of and apparatus for hardening metallic articles | |
SE8704226L (en) | PILGER DISC FOR PIPE MANUFACTURING | |
US4261769A (en) | High pressure fuel injection tubing material | |
CA955836A (en) | Induction heating method of case hardening carbon steel rod | |
GB717164A (en) | Improvements in or relating to hollow metal bodies | |
FR2283383A1 (en) | Expansion joint for cryogenic fluid pipes - has bellows and sleeve forming chamber for gas preventing compensation | |
GB488913A (en) | Pipes for hot gases, steam and the like | |
ES324784A1 (en) | Procedure for the treatment of hardened hipoeutectoid steels. (Machine-translation by Google Translate, not legally binding) | |
GB1385243A (en) | Method and apparatus for the quench-hardening of tubes | |
KR900009379A (en) | Manufacturing method of bushing for caterpillar band | |
BR8906357A (en) | LAMINATION RING | |
JPS55122825A (en) | High pressure fluid pipe and manufacture thereof | |
US2316110A (en) | Internally stressed structure | |
US2511706A (en) | Method of producing bearing rings | |
US2546442A (en) | Connecting sleeve for burners and hot-blast stoves | |
JPS5248507A (en) | Method for cooling outer surface of metallic pipe or large diameter | |
SU969495A1 (en) | Method for restoring worn inner cylindrical surface, preferably of steel and cast iron parts | |
SU622797A1 (en) | Method of thermal connection of inorganic dielectric with female steel component | |
US2663068A (en) | Method of cold extruding a projectile with a rotating band | |
GB485753A (en) | Improvements relating to the surface hardening of hollow metal articles | |
US2478293A (en) | Hot-blast furnace stove | |
US2405859A (en) | Tubular structural member | |
US2541115A (en) | Hardened metallic structure | |
RU2232197C1 (en) | Method and apparatus for manufacture of high-strength steel thin-walled products of precise geometric sizes | |
CH244427A (en) | Pistons for internal combustion engines. |