在MMS300热力模拟实验机上对一种含钛低合金超高强耐磨钢进行热模拟实验，研究了热变形奥氏体在连续冷却转变过程中的相变行为，建立了其连续冷却转变曲线(CCT曲线)，观察了不同冷速下的组织变化情况，并探讨了精轧阶段变形量和变形温度对试验钢组织和性能的影响。结果表明，变形促进了先共析铁素体和珠光体的转变，缩短其孕育期，在一定程度上扩大了相变区域；采用较低(800℃)或较高(950℃)的精轧开轧温度以及较大的精轧累积变形量(50%)均能够得到较细的晶粒组织，有利于提高试验钢的强度和硬度。
The continuous cooling transformation behavior of Ticontaining lowalloy ultrahigh strength abrasionresistant steel was studied by MMS300, and its continuous cooling transformation diagram (CCT diagram) was also established. Then observed the microstructure of steel under different cooling rates, and discussed the effects of finishing rolling temperature and accumulate deformation on microstructure and properties on steel. The results showed that deformation not only accelerates eutectoid ferrite and pearlite transformation, but also reduces the incubation period and enlarges the phase transition zone, lower (800℃) or higher (950℃) start finishing rolling temperature plus larger accumulate deformation (50%) could refine the grain size, which were benefit to the strength and hardness on steel.
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