为了保证冷轧工作辊淬硬层和心部组织、性能,避免最终淬火开裂,生产上通常采用球化退火或调质处理,以得到良好的球化珠光体,为最终淬火提供有利的条件。调质处理有综合机械性能好、工艺周期短等优点,所以国内外许多生产厂多以锻后球化退火作为第一次预备热处理,而以调质作为第二次预备热处理。但是,目前生产上所采用的常规调质工艺,往往还得不到较为理想的均匀分布的细小碳化物,而且还常常出现碳化物粗大和网状偏聚等缺陷,严重地影响轧辊的质量和使用寿命,为此我们对轧 In order to ensure the hardened layer and core structure and performance of the cold rolling work roll and avoid the final quench cracking, spheroidizing annealing or quenching and tempering is usually adopted in the production to obtain good spheroidal pearlite, which provides favorable conditions for the final quenching. Quenching and tempering has the advantages of good mechanical properties and short process cycle. Therefore, many domestic and foreign production plants mostly use forged posterior ball annealing as the first pre-heat treatment and quenched and tempered as the second pre-heat treatment. However, the conventional quenching and tempering processes used in the production often fail to obtain the ideal uniform distribution of fine carbides, and often the defects such as coarse carbides and reticular segregation also seriously affect the quality of the rolls and Life, for which we are rolling