Low-carbon cold-rolled steel plate with high nitriding performance and stamping performance and preparation method for low-carbon cold-rolled steel plate

Abstract

The invention discloses a low-carbon cold-rolled steel plate with high nitriding performance and stamping performance and a preparation method for the low-carbon cold-rolled steel plate. The cold-rolled steel plate is prepared from the following chemical elements in percentage by weight: 0.010 to 0.060 percent of C, less than or equal to 0.030 percent of Si, 0.10 to 0.40 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 0.045 to 0.080 percent of Al, 0.0010 to 0.0050 percent of B and less than or equal to 0.0050 percent of N, and a preparation process comprises pretreatment of molten iron, smelting in a converter, refining in an RH furnace, continuous casting, hot rolling, reeling, five-rack acid washing cold continuous rolling, continuous annealing, finishing and obtaining of a finished product. Nitriding steel produced by the method is used for producing cooking utensils or small household appliances, and has the advantages of high stamping performance, high nitriding performance, high nitriding qualified rate and low cost.

Description

technical field [0001] The invention belongs to the field of cold-rolling technology of metal materials, and in particular relates to a low-carbon cold-rolled steel plate with excellent nitriding performance and stamping performance and a preparation method thereof. Background technique [0002] Small household appliances and cooking utensils require high wear resistance and high corrosion resistance. Generally, nitriding is used to infiltrate nitrogen into cast iron and aluminum-coated steel sheets to produce cookware or small household appliances with high surface hardness. However, due to new Due to environmental protection laws and other reasons, the use of aluminum-plated plates will be gradually stopped; while the thickness of cast iron is relatively thick, and the production cost is high. When ordinary cold-rolled steel plates are used as nitriding substrates, various problems such as bubbles, bursts, and holes will appear during the nitriding process, and the qualifi...

AI Technical Summary

Problems solved by technology

This patent adds a large amount of Al elements and alloying elements Cr, Ti and V, and the cost is relatively high. It is mainly used to manufacture tools and mechanical parts with wear resistance, fatigue strength and seizure resistance.

Images