A method to improve the mechanical properties of 316ln 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
Active Publication Date: 2018-04-20
江阴市劲松科技有限公司
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Problems solved by technology
[0006] The purpose of the present invention is to provide a method for improving the mechanical properties of 316LN austenitic stainless steel, aiming at the problem that the yield strength is too low due to the coarse grain of the existing 316LN austenitic stainless steel, through which the yield strength of 450-600 MPa can be obtained , 316LN austenitic stainless steel with a tensile strength of 1020-1220MPa and an elongation greater than 50%, and the method of the invention is simple to operate and easy to realize industrial production
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[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] First, the present embodiment adopts the following equipment: the hot rolling mill is a φ450 hot rolling mill, the cold rolling mill is a φ325×400mm four-high straight-pull reversing cold rolling mill, and the heating furnace for annealing is a box-type resistance furnace for heat treatment.
[0023] The concrete operation of the inventive method is as follows:
[0024] The composition (wt.%) of 316LN austenitic stainless steel is as follows: C is 0.04, Si is 0.34, Mn is 1.15, Cr is 18.06, Ni is 8.33, S is 0.03, P is 0.04, Mo is 0.051, and N is 0.0008 , and the rest are Fe and unavoidable impurities.
[0025] Use a hot rolling mill to forge the 316LN austenitic stainless steel ingot with the above composition into a billet with a thickness of 45-50 mm, heat the billet to 1200-1220 ° C with the furnace and keep it for 2.5-3 hou...
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Abstract
The invention discloses a method capable of improving the mechanical property of 316 LN austenitic stainless steel, and belongs to the field of stainless steel preparing. According to the method, a 316 LN austenitic stainless steel billet with the thicknesses ranging from 40 mm to 60 mm is subject to hot rolling to a board with the thickness ranging from 4 mm to 5 mm; through cold rolling-annealing process treatment, the 316 LN austenitic stainless steel is prepared, wherein the yield strength of the steel ranges from 450 MPa to 600 MPa, the tensile strength ranges from 1020 MPa to 1220 MPa, and the ductility is larger than 50%; and through the method, the problem that in the prior art, 316 LN austenitic stainless steel is insufficient in yield strength is solved. The method is easy to operate, and industrial production is conveniently achieved.
Description
technical field [0001] The invention relates to the preparation of stainless steel, in particular to a method for improving the mechanical properties of 316LN austenitic stainless steel. Background technique [0002] The use of most stainless steel requires long-term maintenance of the original appearance of the building. In heavily polluted industrial areas and coastal areas, the surface will be very dirty and even rusted. However, to ensure the aesthetic effect of the outdoor environment, nickel-containing stainless steel is required. Tensitic stainless steel is a widely used stainless steel species, accounting for 70% of the total stainless steel consumption. 316LN austenitic stainless steel is a very good material, it has excellent low temperature performance, strong corrosion resistance, good plasticity and ductility, high tensile strength, so it is widely used in low temperature technology, marine engineering, biochemical and other industries. However, the yield stre...
Claims
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IPC IPC(8): C22C38/44C22C38/04C22C38/02C21D8/02
CPCC21D8/0226C21D8/0236C21D8/0273C22C38/001C22C38/02C22C38/04C22C38/44
Inventor 万响亮许德明胡丞杨李光强徐光吴开明肖然郭世琛
Owner 江阴市劲松科技有限公司