High-strength 301L stainless steel used for bus, and manufacture method thereof

A manufacturing method, stainless steel technology, applied in the field of stainless steel strip steel, can solve problems such as edge cracking of 301L steel, and achieve the effects of low production cost, high yield and high production efficiency

Active Publication Date: 2013-04-03
BAOSTEEL DESHENG STAINLESS STEEL
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Problems solved by technology

[0008] The purpose of the present invention is to provide a manufacturing method of 301L stainless steel for high-strength passenger cars, which can solve the defect problems such as edge cracks in 301L steel during rolling, ensure the quality of the edge of 301L hot-rolled strip steel, and ensure the quality of cold-rolled strip steel performance, improved surface finish

Method used

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  • High-strength 301L stainless steel used for bus, and manufacture method thereof
  • High-strength 301L stainless steel used for bus, and manufacture method thereof
  • High-strength 301L stainless steel used for bus, and manufacture method thereof

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Embodiment Construction

[0068] Refer to Table 3 for the embodiment of the present invention, Table 3 for the heating process parameters of hot rolling, and Table 5 for the rolling process parameters of hot rolling. For the control parameters of the high-strength 301L cold-rolling process, see Tables 6 to 9.

[0069] Table 3: Chemical composition of 301L hot-rolled test slabs

[0070] Unit: weight percent

[0071] Example

[0072] Table 4: Hot rolling heating process parameter table (slab temperature ℃)

[0073] Example

[0074] Table 5: Hot rolling process parameter table

[0075]

[0076] Table 6: Control parameters of DLT strength grade 301L cold rolling process

[0077] serial number

[0078] Table 7: ST strength grade 301L cold rolling process control parameters

[0079] serial number

[0080] Table 8: MT Strength Grade 301L Cold Rolling Process Control Parameters

[0081] serial number

[0082] Table 9: HT Strength Grade 301L Cold Rolling...

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Abstract

The invention relates to high-strength 301L stainless steel used for a bus, and a manufacture method thereof. The high-strength 301L stainless steel comprises the following chemical components in percentage by weight: 0.010-0.020% of C, 0.20-0.60% of Si, 0.80-1.50% of Mn, 16.90-17.40% of Cr, not more than 0.035% of P, not more than 0.0050% of S, 6.90-7.40% of Ni and 0.090-0.14% of [N], wherein Creq = Cr% + Mo% + 1.5Si% + 0.5Nb% and is controlled at 17.5-17.9%, and Nieq = Ni% + 30(C% +N%) + 0.5Mn% and is controlled at 10.5-12.35%. The invention solves the problem that defects such as edge cracking emerge during the rolling process of 301L steel, guarantees the edge quality of 301L hot-rolled strip steel and the performance of cold-rolled strip steel and improves surface cleanness of steel.

Description

technical field [0001] The invention relates to a stainless steel strip, in particular to a 301L stainless steel for high-strength passenger cars and a manufacturing method thereof, that is, a metastable austenitic stainless steel cold-rolled strip. Background technique [0002] 301L stainless steel for high-strength passenger cars belongs to the metastable austenitic stainless steel. The steel is rapidly cooled in the state of high-temperature austenite structure, and can maintain the high-temperature austenite structure to room temperature. At this time, the austenite structure is supercooled austenite. body. When not affected by the outside world, the structure of steel does not change. When deformed by an external force, a phase transformation occurs, and the austenite structure of the steel transforms into martensite. Due to the martensite structure in the steel after cold deformation, the steel is magnetic and the strength of the steel is improved. Utilizing this fe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/48C21D8/02B21B37/74B21B37/16
Inventor 叶晓宁黄俊霞池和冰
Owner BAOSTEEL DESHENG STAINLESS STEEL
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