中文摘要：

研究了加热速率、加热温度、保温时间及冷却速率等热处理工艺参数对高速车轮钢CL50D热处理态的晶粒度和断裂韧性的影响。结果表明,对轧态车轮钢采用快速加热（10～25℃/min）至约850℃,保温30～60 min后,经1～2℃/s控制冷却至室温可得到细化且均匀的珠光体＋网状铁素体组织,断裂韧性优异Kq可达90 MPa.m1/2以上。

英文摘要：

Abstract ： Effect of the heating rate, austenizing temperature, holding time and cooling rate on the grain size and fracture toughness K1c （ or Kq ） of a high speed wheel steel CLSOD were studied. The results show that when austenitized at 850 ℃ with high heating rate （ 10-25 ℃/min） for proper holding time （30-60 min） and then air cooled in 1-2 ℃/s, the hot-rolled wheel steel can obtain fine and homogeneous pearlite and netted ferrite mierostrueture and high fracture toughness （90 MPa · ml/2）.