The method to solve the peeling and peeling of the iron oxide scale welded by the pickling plate used in the compressor

Abstract

The invention relates to a method for solving the peeling and peeling of the welded iron scale of the pickling plate used for the compressor. The chemical composition of the slab is optimized and controlled through the steelmaking process. The chemical composition of the slab is: C 0.045~0.075%, Si≤ 0.08%, Mn 0.15~0.30%, P≤0.025%, S≤0.010%, Als 0.015~0.050%, Nb≤0.020%, V≤0.020%, Ti≤0.020%, the balance is Fe; controlled by hot rolling process The microstructure of the pickling plate, the specific hot rolling process includes slab heating→rough rolling→finish rolling→coiling→hot coil finished product, in which the finishing rolling process requires the final rolling temperature to be 890~910℃, and after finishing rolling to be 18~25℃ The cooling speed of / s is cooled to 680~700°C for coiling, and the laminar cooling mode adopts the post-stage cooling. The invention can obtain good matching of components, structure and formability of the finished pickling board, realize flexible control of the oxide scale structure in the heat-affected zone, and prevent peeling and shedding.

Description

technical field [0001] The invention relates to a method for solving the peeling and peeling of iron oxide scales welded with pickling plates for compressors, and belongs to the technical field of plate production control. Background technique [0002] As society progresses, refrigerators and commercial freezers, which are closely related to people's lives, are becoming more and more popular. As the core component of refrigeration equipment, the compressor is called the "heart" of the refrigerator. The compressor mainly consists of an outer casing and an inner compressor body. As the steel for the compressor shell, the upper and lower shells are usually combined and welded after deep drawing of hot-rolled pickled plate. The welding method is lap welding, and the appearance of the shell after welding is as follows: figure 1 as shown, figure 1 The serial number 1 is the position of the weld seam; the main grades of hot-rolled pickling plates for compressors are low-carbon a...

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Problems solved by technology

This type of patent is mainly aimed at the thickness and structure control of iron oxide scale in the production process of the production line, and no relevant papers and patent reports related to the control of iron oxide scale in the heat-affected zone of the weld seam in the use process, especially in the welding process, have been found.

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