Stainless steel wire rod for standard parts and method for manufacturing same

Abstract

The invention discloses a stainless steel wire rod used on a standard part as well as a manufacturing method, the stainless steel wire rod comprises the compositions, in weight percent: C: 0.03 to 0.08, Si<=0.55, Mn: 13.50 to 15.50, P<0.045, S <0.020, Cr: 12.50 to 14.00, Ni: 0.80 to 1.45, Cu: 1.75 to 3.50, balance Fe and unavoidable impurities. The manufacturing method includes the following steps of: 1. adopting an electric furnace plus an AOD secondary refining process for smelting, and continuous casting to form billet, 2. rolling, with a soaking temperature of between 1220DEG C and 1250DEG C, an initial rolling temperature >=1180DEG C, and a finishing temperature of between 950DEG C and 1050DEG C; 3. solid solution heat treatment, with a solid solution temperature of 1050DEG C+-10DEG C, the heat preservation time of 40 minutes, and the heating time of 30 to 60 minutes, and water cooling after exiting the furnace; and 4. acid washing. The wire rod and the manufacturing method reduce the nickel and chromium content and effectively save the nickel resource, and have greatly reduced costs of steel per ton compared with 304HC, and have excellent cold working performance.

Description

technical field [0001] The invention relates to a stainless steel wire rod and a manufacturing method thereof, in particular to a high-manganese, low-nickel, copper-containing economical stainless steel wire rod for standard parts and a manufacturing method thereof. Background technique [0002] Screws, nuts, screws and other stainless steel standard parts are widely used in various industries. At present, the main steel grade used to make stainless steel standard parts is 304HC. 304HC is an improved type steel based on 18-8 austenitic stainless steel with copper added. species, the mass percentage of its chemical composition is C≤0.05, Si≤1.00, Mn≤2.00, P≤0.045, S≤0.020, Ni 8.00~9.00, Cr 18.00~20.00, Cu 1.50~3.50, and the rest are Fe and impurities. [0003] 304HC belongs to 18-8 type austenitic stainless steel. Because it contains high precious metal element nickel, its manufacturing cost is relatively high. Applying 304HC standard parts regardless of environment and purp...

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Problems solved by technology

[0003] 304HC belongs to 18-8 type austenitic stainless steel, because it contains higher precious metal element nickel, making its manufacturing cost higher

[0006] However, the main problems of this material are: (1) high content of precious metal nickel, resulting in high production cost (2) low carbon content control of 304HC, long time for AOD decarburization by oxygen blowing, reduced AOD furnace life, and increased smelting cost

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