JPS5687652A - Track bush - Google Patents
Track bushInfo
- Publication number
- JPS5687652A JPS5687652A JP16350379A JP16350379A JPS5687652A JP S5687652 A JPS5687652 A JP S5687652A JP 16350379 A JP16350379 A JP 16350379A JP 16350379 A JP16350379 A JP 16350379A JP S5687652 A JPS5687652 A JP S5687652A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- bush
- track bush
- enhance
- medium carbon
- 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.)
- Pending
Links
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
PURPOSE: To prevent a deterioration of a medium carbon carburizing steel for a track bush in the tube formability and forgeability and enhance the endurance of a product track bush by adding a specified very small amount of B to the steel without adding alloying elements such as Cr and Mo.
CONSTITUTION: Each track bush of railroad vehicles is made of medium carbon carburizing steel contg. 0.28W0.40% C, 0.15W0.35% Si, 0.60W1.70% Mn, < 0.03% Ti and 0.0005W0.0030% B. The steel is carburized at 930°C for 42hr to enhance the wear resistance of the bush. The contained B enhances the hardenabrlity of the steel by twice and increses the strength of the core part. A full martensite structure is formed, resulting in improved toughness and lower crack propagation sensitivity. In addition, the cold forgeability is enhanced, and the productivity is improved.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16350379A JPS5687652A (en) | 1979-12-18 | 1979-12-18 | Track bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16350379A JPS5687652A (en) | 1979-12-18 | 1979-12-18 | Track bush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5687652A true JPS5687652A (en) | 1981-07-16 |
Family
ID=15775093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16350379A Pending JPS5687652A (en) | 1979-12-18 | 1979-12-18 | Track bush |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5687652A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4419152A (en) * | 1981-07-21 | 1983-12-06 | Italtractor Itm S.P.A. | Process for direct heat treatment of track links for tractors or tracked vehicles |
| US4886710A (en) * | 1987-04-16 | 1989-12-12 | Kennametal Inc. | Mining/construction tool bit having bit body fabricated from Mn-B steel alloy composition |
| JPH03219043A (en) * | 1990-01-23 | 1991-09-26 | Topy Ind Ltd | Low carbon boron steel track shoe and its manufacture |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS501340A (en) * | 1973-04-09 | 1975-01-08 |
-
1979
- 1979-12-18 JP JP16350379A patent/JPS5687652A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS501340A (en) * | 1973-04-09 | 1975-01-08 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4419152A (en) * | 1981-07-21 | 1983-12-06 | Italtractor Itm S.P.A. | Process for direct heat treatment of track links for tractors or tracked vehicles |
| US4886710A (en) * | 1987-04-16 | 1989-12-12 | Kennametal Inc. | Mining/construction tool bit having bit body fabricated from Mn-B steel alloy composition |
| JPH03219043A (en) * | 1990-01-23 | 1991-09-26 | Topy Ind Ltd | Low carbon boron steel track shoe and its manufacture |
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