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Preparation method of stainless steel coach plate for high-speed train

A technology for high-speed trains and stainless steel plates, applied in the field of metallurgy, can solve the problem of not inventing the strength level control method, etc., and achieve the effects of avoiding surface defects, high yield ratio and reducing production costs.

Active Publication Date: 2013-02-06
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, no better strength level control method than quench and temper rolling has been invented

Method used

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  • Preparation method of stainless steel coach plate for high-speed train
  • Preparation method of stainless steel coach plate for high-speed train
  • Preparation method of stainless steel coach plate for high-speed train

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 A 301L stainless steel slab whose components are C 0.024, N 0.112, Cr 17.06, Ni 7.01, Si 0.57, Mn 1.23, P 0.034, S 0.001, and the rest Fe is rolled at 1100°C, and finally rolled The temperature is 900°C, the coiling temperature is 610°C, and the hot-rolled sheet is rolled into a 6mm hot-rolled sheet; the hot-rolled sheet is kept at 1050°C for 10 minutes and then water-quenched, and the volume fraction is 20% to HNO 3 , HF with a volume fraction of 70% and H with a volume fraction of 10% 2 The acid solution of O is pickled at room temperature and rolled into a 1.8mm thick cold-rolled sheet at a reduction rate of 70% on a 4-roll cold rolling mill. Then, when the annealing temperature is 1100°C, the strength grade is LT Carriage board; when the annealing temperature is 950°C, the strength grade is DLT; when the annealing temperature is 890°C, the strength grade is ST; when the annealing temperature is 840°C, the strength grade is MT When the annealing temperatu...

Embodiment 2

[0028] Example 2 The components are C 0.024, N 0.112, Cr 17.06, Ni 7.01, Si 0.57, Mn 1.23, P 0.034, S 0.001, and the rest is Fe. The 301L stainless steel slab is rolled at 1100°C and finished rolling The temperature is 900°C, the coiling temperature is 610°C, and the hot-rolled sheet is rolled into a 6mm hot-rolled sheet. The hot-rolled sheet is kept at 1100°C for 20 minutes and then water-quenched. After the volume fraction is 20%, it is HNO 3 , HF with a volume fraction of 70% and H with a volume fraction of 10% 2 The acid solution of O was pickled at room temperature and then rolled on a 4-roll cold rolling mill at a reduction rate of 80% to form a cold-rolled sheet of 1.2 mm. Then, when the annealing temperature is 1050°C, a car body panel with a strength grade of LT is obtained; when the annealing temperature is 910°C, a car body plate with a strength grade of DLT is obtained; when the annealing temperature is 860°C, a car body with a strength grade of ST is obtained Wh...

Embodiment 3

[0030] Example 3 The 301L stainless steel slab whose composition is C 0.024, N 0.112, Cr 17.06, Ni 7.01, Si 0.57, Mn 1.23, P 0.034, S 0.001, and the rest is Fe is rolled at 1100°C, and the final rolling temperature is 900°C , the coiling temperature is 610°C, hot-rolled and rolled into a hot-rolled sheet of 6 mm; the hot-rolled sheet is kept at 1050°C for 30 minutes and then water-quenched; after the volume fraction is 20%, it is HNO 3 , HF with a volume fraction of 70% and H with a volume fraction of 10% 2 After pickling with acid solution of O at room temperature; on a 4-roll cold rolling mill, roll it into a 0.8mm cold-rolled sheet at a reduction rate of 88%; then when the annealing temperature is 1080°C, the strength grade is LT When the annealing temperature is 940°C, the strength grade is DLT; when the annealing temperature is 900°C, the strength grade is ST; when the annealing temperature is 830°C, the strength grade is MT car body plate; when the annealing temperatur...

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Abstract

The invention relates to the technical field of metallurgy, specifically to a preparation method of a stainless steel coach plate for a high-speed train. The method comprises the following technical steps: firstly, choosing a 30L stainless steel plate, after hot rolling solution treatment, acid-washing and cold rolling, performing flexible annealing with different conditions, obtaining the coach plate with strength level of LT when an annealing temperature is 1050-1100 DEG C; obtaining the coach plate with strength level of DLT when an annealing temperature is 910-950 DEG C; obtaining the coach plate with strength level of ST when an annealing temperature is 860-900 DEG C; obtaining the coach plate with strength level of MT when an annealing temperature is 810-840 DEG C; and obtaining the coach plate with strength level of HT when an annealing temperature is 780-800 DEG C, and an annealing time at each of the different temperatures is 1-3min. The technology can obtain better comprehensive performance than a traditional production technology, and particularly, has more obvious superiority in high-strength levels.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for preparing a stainless steel carriage plate for high-speed trains. Background technique [0002] As the speed of domestic railways increases, the requirements for train body materials are becoming increasingly stringent. After the railway speed is increased to 200 kilometers per hour, the technical requirements for locomotives, rails and other related operating equipment and infrastructure will be greatly increased. The car shells of the EMU trains are all made of aluminum alloy or stainless steel. The speed of the EMU train can reach more than 200 kilometers per hour, and the pressure it receives during its travel is much greater than that of the original train. , due to the high-speed performance requirements of the EMU, the weight of the locomotive must be light, so the production materials of the unit must have high strength. To a certain extent, this also r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/40C21D8/02C21D9/46C21D1/26
Inventor 刘振宇欧阳林兵马国才江来珠白晋钢李志斌叶晓宁王国栋
Owner NORTHEASTERN UNIV LIAONING
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