高速钢轧辊热处理断裂原因分析

Cause Analysis of High Speed Steel Roll Breakage during Heat Treatment Process

通过对热处理过程中断裂的高速钢轧辊的组织、性能、成分的检测和分析,得出辊身断裂的主要原因是:由于填芯时芯部的高温铁水对已凝固的外层高速钢回熔量过大,因而造成芯部合金总量增加,使芯部组织尤其是结合层部位碳化物数量过高,从而导致轧辊结合层强度和芯部强度急剧降低。

Through inspection of the microstructure, properties, alloy content of core and interface of broken high speed steel rolls during heat treatment process, the main cause of barrel breakage was found. During core pouring process, the melt back capacity of high temperature melted iron is too much for the out layer, causes total capacity of core alloy increases, made core structure, especially carbide quantity of interface part become over much,and made strength of roll interface and core rapidly decreased.