New manufacture technique of duplex metal composite lining board

Abstract

The invention discloses a new manufacturing process of a bimetal compound scaleboard, which comprises molding and pouring and includes the following steps: (1) a thin steel plate (C) welded with a steel shore (D) is put into a mold cavity, the thin steel plate (C) divides the mold cavity into a wear resistant layer (A) and an ordinary steel layer (B); (2) when pouring, the wear resistant layer (A) is poured first, when the height of the molten steel reaches 1cm, the ordinary steel layer (B) is poured, the height difference between the liquid in the two mold cavities is constantly kept at 2cm; 3) the temperature is increased to 980 DEG C, the heat preservation time is calculated according to the thickness of the liner by 0.5h / cm, after the heat preservation, the hardness of the scaleboard reaches 61-62HRC by quenching and the shock value reaches 8-10J / cm<2>. The new production process of the bimetal compound scaleboard simplifies the pouring process, improves the compounding quality of the scaleboard, improves the wear resistant property of the scaleboard, can prevent the scaleboard from fracture, and reduces the maintenance cost.

Description

technical field [0001] The invention relates to a bimetal composite liner, in particular to a new manufacturing process for a bimetal composite liner. Background technique [0002] At present, in China, barrel ball mills are widely used, mainly in metal mines, cement, power systems and other industries. The liner is the main structure in the barrel ball mill, and it is a key wearing part used to protect the barrel of the ball mill from the direct impact and friction of the grinding body and materials. Most of the ball mill liners currently used are made of high manganese steel. Although the toughness is good, the wear resistance is not good enough, the yield strength is low, and it is easy to deform during use, causing the ball mill liners to fall off due to the bolts breaking. In order to improve the wear resistance of the liner, most of the current liner adopts a bimetallic composite structure. However, the pouring process of the current bimetallic composite liner is rel...

AI Technical Summary

Problems solved by technology

However, the casting process of the current bimetallic composite lining board is relatively complicated and the composite quality is not good, and it is prone to delamination, mixed pouring, etc., resulting in the phenomenon that the lining board is not wear-resistant or cracked during use.

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