论文部分内容阅读
高速钢淬火前进行的退火处理方式,对淬火后的奥氏体晶粒度影响很大。高速钢在回火退火时,先在比较低的温度下进行奥氏体化,接着,在油中淬火,然后,将淬火马氏体在低于该钢的A_1温度以下进行充分时效。在等温退火时,先进行低温奥氏体化,随后冷却,并在A_1温度下等温。这两种工艺方法,都在铁素体基体上形成碳化物的聚集。经回火退火或等温退火的高速钢,再进行常
High-speed steel quenching before the annealing treatment, the austenite grain size after quenching a great impact. High-speed steels are tempered at a relatively low temperature during tempering annealing, followed by quenching in oil. The quenched martensites are then sufficiently aged below the A_1 temperature of the steel. During isothermal annealing, austenitizing at low temperature followed by cooling and isothermal at A_1 temperature. Both of these processes involve the formation of carbides on the ferrite matrix. After tempering annealing or isothermal annealing of high-speed steel, and then often