【摘要】 通过热模拟试验,研究了轧管后控冷温度(TA)对33Mn2V钢再加热后奥氏体晶粒尺寸及其减径后相变行为的影响。结果表明:当TA≥Ar3时,再加热后的奥氏体晶粒将不能被细化;当TA≤Ar1时,再加热后的奥氏体晶粒得到显著细化。当冷速为0.3℃/s,控冷温度为600℃(≥Ar3)时,可获得细小均匀的铁素体和珠光体组织;控冷温度为300℃(≤Ar1)时,得到以铁素体和珠光体为主的组织,但其均匀性较差。更多还原

【Abstract】 The influence of controlled cooling temperature（T_A） on the austenite grain size after reheating and the phase transformation behavior of steel 33Mn2V designed for non-quenched/tempered hot rolling N80 oil-well tubes was investigated by thermal simulation tests on a Gleblee 1500 simulator.The results indicate that the austenite grain after reheating is not refined when the T_A is higher than Ar₃,however,the austenite grain is obviously refined when T_A is lower than Ar₁.The room temperature microstructure of the final product consists of finer ferrite and pearlite when the T_A was 600 ℃（≥Ar₃） and the cooling rate was 0.3 ℃/s.However,the microstructure is mainly composed of ferrite and pearlite when the T_A was 300℃（≤Ar₁）,but the homogeneity of the constitution is inferior to that of the former.更多还原