Ledeburite steel compression roller shell with high wear resistance

Abstract

The invention discloses a ledeburite steel compression roller shell with high wear resistance. The raw material of the compression roller shell is ledeburite steel, the ledeburite steel comprises thefollowing components of, in percentage by weight, 1.2%-2.3% of carbon, 3.5%-13% of chromium and the balance silicon, manganese, iron, molybdenum, vanadium, tungsten and impurity elements; representative marks of the ledeburite steel include Cr8, Cr12, Cr5Mo1V, Cr12W, Cr12MoV and Cr12Mo1V1 in GB / T1299-2014; tempered martensite, carbides and retained austenite exist in the metallographic structure of the ledeburite steel compression roller shell; and the carbides comprise eutectic carbides and eutectoid carbides. According to the ledeburite steel compression roller shell, the high wear resistance of the eutectic carbides is utilized to enhance the wear resistance of the compression roller shell, so that the service life of the compression roller shell is prolonged.

Description

technical field [0001] The invention relates to the field of pressure roller shells, in particular to a ledeburite steel high wear resistance pressure roller shell. Background technique [0002] The pressure roller shell is a vulnerable part of the granulator. The blank of the pressure roller shell currently produced is a forged steel part, and the material used is low-carbon low-alloy carburizing steel with a carbon content of 0.15%~0.25%, or a carbon content of 0.9%~1.1%. Alloy bearing steel, or alloy spring steel containing 0.5%~0.7% carbon, the existing patent CN201611195068.5 "A Pressure Roller Structure for Biomass Pellet Machine" for the manufacturing method of the pressure roller shell only mentions the pressure roller The shell is made of carburized steel, and the wear resistance of the carburized steel roll shell has not been elaborated and improved. In view of these defects, it is necessary for us to design a ledeburite steel high wear-resistant roll shell. Cont...

AI Technical Summary

Problems solved by technology

[0002] The pressure roller shell is a vulnerable part of the granulator. The current production of the pressure roller shell blank is forged steel, and the material used is low-carbon low-alloy carburizing steel with a carbon content of 0.15%~0.25%, or a carbon content of 0.9%~1.1%. Alloy bearing steel, or alloy spring steel containing 0.5%~0.7% carbon, the existing patent CN201611195068.5 "A Pressure Roller Structure for Biomass Pellet Machine" for the manufacturing method of the pressure roller shell only mentions the pressure roller The shell is made of carburized steel, and the wear resistance of the carburized steel roll shell has not been elaborated and improved. In view of these defects, it is necessary for us to design a ledeburite steel high wear-resistant roll shell