Cold rolling technique of stainless steel plate with frosted surfaces

Abstract

The invention discloses a cold rolling technique of a stainless steel plate with frosted surfaces, belonging to the technical field of manufacturing of stainless steel plates. The invention mainly improves the original cold rolling technique, and the improved cold rolling technique comprises the following steps of: carrying out procedures of cold rolling, annealing, leveling on the hot rolling raw materials, achieving the effect of frosted surfaces without subsequent grinding on the surface, during cold rolling, strictly controlling the rolling speed of each pass, reducing rolling reduction of each pass gradually, strictly controlling the roughness of a roll and a leveling roll of the final pass of a rolling mill, carrying out recrystallization soften annealing by a bright annealing furnace, and eliminating yield point elongation by a leveling machine after discharged out of the furnace. Due to simple production technique, the invention not only has the surface approximate to the frost surface, and the properties of wear resistance, high temperature resistance and high strength and the like, but also has cheap price, low production cost and short production period. The improved cold rolling technique is widely applied to the field of electronic products, greatly saves the production cost and has strong market competitiveness.

Description

technical field [0001] The invention belongs to the technical field of manufacturing stainless steel plates, in particular to a cold rolling process of a precision stainless steel strip whose surface is close to a frosted surface. Background technique [0002] At present, cold-rolled stainless steel sheets have been widely used in various electronic components, such as liquid crystal display casings, computer mainframe chassis, and hard disk casings. The common feature is that the required stainless steel surface is in a non-bright state close to the frosted surface. [0003] The existing cold-rolled 304 stainless steel hard plate has occupied a certain leading position in the application of the above products because its surface is similar to the frosted surface, and it has high strength, corrosion resistance, and high temperature resistance. However, the 304 stainless steel composition contains A large amount of Ni element leads to high price and high cost, and the product...

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Problems solved by technology

[0003] The existing cold-rolled 304 stainless steel hard plate has occupied a certain leading position in the application of the above products because its surface is similar to the frosted surface, and it has high strength, corrosion resistance, and high temperature resistance. However, the 304 stainless steel composition contains A large amount of Ni element leads to high price and high cost, and the production process of 304 hard plate is cumbersome. After general cold rolling and annealing, secondary rolling, cleaning line cleaning of surface rolling oil and over tension leveling are still required. machine to adjust the plate shape and other processes, the production cycle is long, not environmentally friendly, which greatly increases the manufacturing cost

Because 430 stainless steel does not contain Ni, the price is relatively low. However, due to technical limitations, the existing cold rolling mills can only produce 430 stainless steel plates with bright surfaces. After rolling, annealing, tempering and other cold rolling processes, grinding is still required, and the process is relatively complicated

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