Low-carbon steel coil plate for oil filter thread cover plate and manufacturing method thereof

Abstract

The invention discloses a low-carbon steel coil plate for an oil filter thread cover plate and a manufacturing method thereof. The low-carbon steel coil plate comprises chemical components including,by weight percent, 0.03 to 0.05% of C, not larger than 0.040% of Si, 0.30 to 0.50% of Mn, not larger than 0.018% of P, not larger than 0.018% of S, 0.028 to 0.058% of Al, 0.030 to 0.060% of Ti, and not larger than 0.0045% of N. A plate blank is heated to be larger than or equal to 1190 DEG C, the heating time is larger than or equal to 175 min, the soaking time is larger than or equal to 40 min, through rough rolling and finish rolling, a hot rolling plate is obtained, the finish rolling final rolling temperature ranges from 885 to 915 DEG C, the coiling temperature is 580 to 640 DEG C, finally, flattening and acid pickling are carried out, according to the properties, Rel is 280 to 330 MPa, Rm is 380 to 430 MPa, A50 is larger than or equal to 40%, the grain size is larger than or equal to9 levels, and the difference between the surface and the 1 / 2 position of the thickness is smaller than or equal to 1 level. The low-carbon steel coil plate has the higher strength, better ductility,uniform in structure property, and free of cracking in stamping broaching and flanging, turning threads on the inner wall of a cap mouth do not generate burrs, and the requirement of the oil filter thread cover plate anti-deforming after the pumping pressure property of an oil filter is improved can be met.

Description

technical field [0001] The invention relates to the technical field of metal material manufacturing, in particular to the technical field of hot-rolled steel strip manufacturing, in particular to a low-carbon steel coil for an oil filter threaded cover plate 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 such as du...

AI Technical Summary

Problems solved by technology

The existing materials mainly use SPHC low-carbon steel coils. In order to ensure good ductility and plasticity to avoid stamping cracks, generally C: 0.02-0.06%, Si≤0.045%, Mn: 0.10%-0.20%, P: ≤0.020%, S : ≤0.020%, Al: 0.025%~0.060%, N: ≤0.0050%, the rest is Fe and other unavoidable impurities, due to the low carbon manganese equivalent, no V, Nb, Ti microalloying elements, no effective The process control means, tensile strength ≤ 360MPa, when the oil filtration effect is improved, and the pump pressure > 1.6MPa, the existing threaded cover plate is not strong enough, easy to deform and arch, and the pressure bearing of the threaded cover plate of the oil filter Performance can only be achieved by using thicker SPHC low-carbon steel coils to avoid compression and deformation, which is not in line with the development direction of automobile lightweight and energy saving

[0004] If the existing SPHC low-carbon steel coil is strengthened by C and Mn alloys to achieve the required strength of the threaded cover plate, the cost of the alloy is high, and the toughness and plasticity are poor. The edge of the cap mouth is prone to cracking, and the turning thread on the inner wall of the cap mouth is prone to burrs. Although the strength can meet the requirements, it is not suitable for the threaded cover plate of the oil filter.

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