JPS55149701A - Manufacture of long sized rail - Google Patents
Manufacture of long sized railInfo
- Publication number
- JPS55149701A JPS55149701A JP5628779A JP5628779A JPS55149701A JP S55149701 A JPS55149701 A JP S55149701A JP 5628779 A JP5628779 A JP 5628779A JP 5628779 A JP5628779 A JP 5628779A JP S55149701 A JPS55149701 A JP S55149701A
- Authority
- JP
- Japan
- Prior art keywords
- rail
- manufacture
- joule
- rails
- balance
- 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
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 2
- 238000005242 forging Methods 0.000 abstract 2
- 239000010959 steel Substances 0.000 abstract 2
- 238000003466 welding Methods 0.000 abstract 2
- 238000007796 conventional method Methods 0.000 abstract 1
- 238000005098 hot rolling Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/085—Rail sections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE:To manufacture titled rail serviceable for high speed transportation causing little vibration and noise, by hot rolling the low expansion high Mn steel, comprising specified amount of C, Si, Mn and P, and specified amount of either one or more of Cr, Mo, Ti or Ca, and the balance of Fe, into rail under the limited conditions of temperature and forging ratio, and by welding these rails. CONSTITUTION:The low expansion high Mn steel, comprising C<1.5%, Si<3%, 10-40% Mn and P<0.05%, either one or more of Cr<15%, Mo<8%, Ti<5% or Ca<0.05%, and the balance of Fe, is hot rolled into a rail at 700- 1,250 deg.C by 3 or higher forging ratio; then, these rails are welded into a long sized rail. According to this method, the weld cracks are not generated, and the welding becomes possible without causing cracks under the condition of such large heat-input as 60,000 joule/cm (in case of the conventional method, the weld cracks are generated by the heat-input more than 7,000 joule/cm).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5628779A JPS55149701A (en) | 1979-05-10 | 1979-05-10 | Manufacture of long sized rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5628779A JPS55149701A (en) | 1979-05-10 | 1979-05-10 | Manufacture of long sized rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55149701A true JPS55149701A (en) | 1980-11-21 |
Family
ID=13022873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5628779A Pending JPS55149701A (en) | 1979-05-10 | 1979-05-10 | Manufacture of long sized rail |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55149701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020007635A (en) * | 2018-06-28 | 2020-01-16 | Ｊｆｅスチール株式会社 | Processing method of austenitic rail |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50108118A (en) * | 1974-02-05 | 1975-08-26 | ||
| JPS50128617A (en) * | 1974-03-30 | 1975-10-09 |
-
1979
- 1979-05-10 JP JP5628779A patent/JPS55149701A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50108118A (en) * | 1974-02-05 | 1975-08-26 | ||
| JPS50128617A (en) * | 1974-03-30 | 1975-10-09 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020007635A (en) * | 2018-06-28 | 2020-01-16 | Ｊｆｅスチール株式会社 | Processing method of austenitic rail |
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