Ultra-low carbon steel coil plate for ultra-thin shell of oil filter and manufacturing method thereof

Abstract

The invention discloses an ultra-low carbon steel coil plate for an ultra-thin shell of an oil filter and a manufacturing method thereof. The ultra-low carbon steel coil plate comprises the followingchemical components according to the weight percentage: 0.0028 to 0.0050% of C, less than or equal to 0.030% of Si, 0.45 to 0.55% of Mn, less than or equal to 0.012% of P, less than or equal to 0.008%of S, 0. 045-0.080% of Al, 0.065-0.085% of Ti, and less than or equal to 0.0030% of N. The manufacturing method comprises the following steps of: heating a plate blank, and carrying out rough rollingand finish rolling to obtain a hot rolled plate, wherein the coiling temperature is 590-630 DEG C; and carrying out cold rolling on the hot rolled plate to obtain the ultra-low carbon steel coil plate with the thickness of 0.30 to 0.44 mm, wherein the reduction ratio of cold rolling is 80 to 90%, the annealing temperature is 700 to 760 DEG C, the elongation of temper rolling is 1.0 to 2.0% , andthe elongation of straightening and withdrawal is 0.03 to 0.10%. The ultra-low carbon steel coil plate has the Rel of 220-270MPa, Rm of 330-390MPa, hardness of 54-60HR30T, and elongation A80 of greater than or equal to 40%. The ultra-low carbon steel coil plate has relatively high hardness, relatively good ductility, uniform structure property, good isotropic homogeneity and good deep-drawing property, does not generate earing, can completely replace the traditional 0.50-0.70mm thick material, and meets the requirements on thinning and weight reduction of automotive parts.

Description

technical field [0001] The invention relates to the technical field of metal material manufacturing, in particular to the technical field of cold-rolled steel strip manufacturing, in particular to an ultra-low carbon steel coil for an ultra-thin casing of an oil filter and a manufacturing method thereof. Background technique [0002] The oil filter is composed of a shell and a paper filter element, the paper filter element is inside the shell, and the shell is sealed with a threaded cover. The dirty oil pumped by the oil pump enters from 4 to 10 small holes reserved on the threaded cover plate, pushes the one-way valve at the opening of the oil filter and enters the periphery of the filter element, and after being filtered by the filter element, the clean oil enters the middle of the filter element , and then discharged from the oil outlet in the middle of the threaded cover plate to lubricate each movement pair of the car. The oil filter is mainly used to remove impurities...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an ultra-low carbon steel coil for an ultra-thin casing of an oil filter and a manufacturing method thereof to produce ultra-low carbon steel with a thinner thickness range in view of the deficiencies in the prior art Coil, the ultra-low carbon steel coil has higher strength, higher ductility, uniform structure and performance, no cracking in stamping, no tensile strain lines, uniform deformation of deep-drawing circular parts, no or reduced stress Ear defects and other advantages, the ultra-thin range of 0.30-0.44mm thick meets the pressure-bearing and deformation-resistant requirements of the ultra-thin shell of the oil filter. At the same time, the production process of the ultra-low carbon steel coil is simple, easy to operate, and high in production efficiency.

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