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Method for improving mechanical properties of 301LN austenitic stainless steel

A technology of austenitic stainless steel and mechanics, which is applied in the field of stainless steel preparation, can solve problems such as low yield strength and coarse grain, and achieve the effect of easy industrial production and remarkable effect of grain refinement

Inactive Publication Date: 2016-10-26
WUHAN UNIV OF SCI & TECH
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for improving the mechanical properties of 301LN austenitic stainless steel, aiming at the problem that the existing 301LN austenitic stainless steel grains are coarse and the yield strength is too low, and the yield strength of 700-1000MPa can be obtained by this method , 301LN austenitic stainless steel with a tensile strength of 1000-1200MPa and an elongation greater than 30%, and the method of the invention is simple to operate and easy to realize industrial production

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  • Method for improving mechanical properties of 301LN austenitic stainless steel
  • Method for improving mechanical properties of 301LN austenitic stainless steel

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0024] First, this embodiment uses the following equipment: the hot rolling mill is a φ450 hot rolling mill, the cold rolling mill is a φ325×400mm four-roll straight-drawn reversible cold rolling mill, and the annealing furnace is a box-type resistance furnace for heat treatment.

[0025] The specific operations for improving the mechanical properties of 301LN austenitic stainless steel in this embodiment are as follows:

[0026] Take the composition (wt.%) of 301LN austenitic stainless steel as follows: C is 0.017, Si is 0.52, Mn is 1.29, Cr is 17.3, Ni is 6.5, S is 0.025, P is 0.044, Mo is 0.15, N is 0.15 , The rest is Fe and unavoidable impurities.

[0027] The 301LN austenitic stainless steel ingot with the above composition is forged into a billet with a thickness of 45-50mm. The billet is heated with the furnace to 1200°C-1230°C and kept for 2.5-3.5...

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Abstract

The invention discloses a method for improving mechanical properties of 301LN austenitic stainless steel and belongs to the stainless steel preparation field. According to the method, a 301LN austenitic stainless steel blank which is 40-60 mm thick is subjected to hot rolling till a plate which is 4-5 mm thick is obtained; then cold rolling-annealing process treatment is performed; and the 301LN austenitic stainless steel with the yielding strength ranging from 700 MPa to 1000 MPa, the tensile strength ranging from 1000 MPa to 1200 MPa and the ductility larger than 30% is prepared. The method is easy to operate, and industrial production can be achieved conveniently.

Description

Technical field [0001] The invention relates to the preparation of stainless steel, in particular to a method for improving the mechanical properties of 301LN austenitic stainless steel. Background technique [0002] Austenitic stainless steel is the most important steel grade in stainless steel, and its output and consumption account for about 70% of the total output and consumption of stainless steel. Austenitic stainless steel is a very good material. It has excellent low temperature performance, strong corrosion resistance, good plasticity and ductility, and high tensile strength. Therefore, it is widely used in low temperature technology and ocean engineering. , Biochemical and other industries. However, the yield strength of such austenitic stainless steel is very low, and its use in structural parts is greatly restricted. With the rapid development of human society, higher requirements are put forward for the yield strength of austenitic stainless steel, which has become...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C21D8/02
CPCC22C38/44C21D8/0226C21D8/0236C21D8/0247C22C38/001C22C38/02C22C38/04
Inventor 万响亮胡丞杨许德明李光强徐光吴开明
Owner WUHAN UNIV OF SCI & TECH
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