A method for producing stainless steel clad coils by hot rolling of asymmetric stainless steel clad billets

Abstract

The invention discloses a method for producing composite plates from asymmetric stainless steel composite blanks by means of hot-rolling. The method includes arranging the asymmetric stainless steel composite blanks with upward stainless steel surfaces in a heating furnace; controlling the temperatures of the heating furnace in preheating stages at a step A and the furnace staying time, and conventionally heating the asymmetric stainless steel composite blanks at soak stages after the preheating stages are completed; conventionally removing phosphorus on the asymmetric stainless steel composite blanks, then feeding the asymmetric stainless steel composite blanks into a hot-rolling mill and conventionally rolling the asymmetric stainless steel composite blanks to obtain the composite plates; carrying out laminar cooling the rolled composite plates from certain portions behind the heads of plate strips of the rolled composite rolls, and conventionally reeling the composite plates to obtain asymmetric stainless steel composite rolls. The diameters of upper rollers of work rollers of the hot-rolling mill are smaller than those of lower rollers of the work rollers, and the linear speeds of the upper rollers are higher than the linear speeds of the lower rollers. The certain portions are separated from the heads of the plate strips by distances of 2-5 m. The method has the advantages that the method is low in weld load and damage rate and high in yield, the integral efficiency can be improved, the asymmetric stainless steel composite blanks can be stably rolled, and problems of bulging, severe bending, warping, buckling and the like can be solved; composite layers of the asymmetric stainless steel composite rolls produced by the aid of the method are high in surface quality, and the method is low in equipment wear rate.

Description

technical field [0001] The invention provides a method for producing stainless steel composite coils by hot rolling an asymmetric stainless steel composite billet, which belongs to the technical field of metal pressure processing. Background technique [0002] The asymmetric stainless steel composite billet is formed by laminating a piece of stainless steel and a piece of ordinary carbon steel together and welding the surroundings. After the asymmetric stainless steel composite billet is heated and rolled, the two raw material substrates can be metallurgically combined to obtain a new material with special properties. [0003] Conventional stainless steel composite blanks are box-type symmetrical blanks, usually composed of four-layer, six-layer, eight-layer metal raw material plates. Taking the symmetrical stainless steel composite billet composed of four layers of metal raw material plates as an example, the four layers of metal raw material plates are divided into two gr...

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Problems solved by technology

[0008] In order to solve the problems such as weld cracking and bulging in the heating process of the asymmetric stainless steel composite billet, as well as the problems of bending and warping and buckling in the rolling and cooling process, the invention provides a hot-rolled production method for the asymmetric stainless steel composite billet. A method for stainless steel clad plate coils to effectively solve the above problems

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