1.Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China;2.National Engineering Research Center of Advanced Steel Technology, Central Iron and Steel Research Institute, Beijing 100081, China;3.Special Steel Branch, Baoshan Iron and Steel Co., Ltd., Shanghai 200940, China
Abstract：Hot ductility of 17Cr2Ni2MoVNb and 17Cr2Ni2Mo gear steels at the temperature from 600 to 1200 ℃ was measured on stress/strain thermosimulator Gleeble1500D and the mechanism of crack propagation was studied. The results show that the tensile strength of the V（0.1%） and Nb（0.036%） microalloyed 17Cr2Ni2MoVNb steel was higher than that of the 17Cr2Ni2Mo steel, since microalloying elements can result in grain refinement strengthening and solution strengthening. Meanwhile, V and Nb are not detrimental to the ductility of the low N（00057%）containing steel. However, hot ductility of the 17Cr2Ni2Mo steel which contains higher N (0.0130%) was below that of the 17Cr2Ni2MoVNb steel in the test temperature range of 600900 ℃and 10501200 ℃. The differences in N content and in temperature for phases transformation result in the distinction for precipitation of AlN and αferrite between 17Cr2Ni2MoVNb and 17Cr2Ni2Mo, which in turn influence the hot ductility.
张国强;董瀚;王毛球;赵亚平;刘荣佩. 重载齿轮钢的高温性能[J]. 钢铁, 2009, 44(5): 59-0.
ZHANG Guoqiang;DONG Han;WANG Maoqiu;ZHAO Yaping;LIU Rongpei. Study on High Temperature Properties of HeavyDuty Gear Steels. Iron and Steel, 2009, 44(5): 59-0.
2009, Vol. 44 
