重载齿轮钢的高温性能

钢铁, 2009, 44(5): 59-0.

重载齿轮钢的高温性能

2.2.National Engineering Research Center of Advanced Steel Technology, Central Iron and Steel Research Institute, Beijing 100081, China

3.3.Special Steel Branch, Baoshan Iron and Steel Co., Ltd., Shanghai 200940, China

关键词：重载齿轮钢;热塑性;断裂;第二相;铁素体

Study on High Temperature Properties of HeavyDuty Gear Steels

ZHANG Guoqiang , DONG Han , WANG Maoqiu , ZHAO Yaping , LIU Rongpei

Keywords： heavyduty gear steel;hot ductility;fracture;secondary phase;αferrite

通过Gleeble1500D热模拟试验机高温拉伸试验，对比研究了17Cr2Ni2MoVNb和17Cr2Ni2Mo钢的高温性能。结果表明：因微合金元素V（0.1%，质量分数，下同）、Nb（0.036%）产生细晶强化及固溶强化，17Cr2Ni2MoVNb 钢的抗拉强度比17Cr2Ni2Mo钢稍高。在低N（0.0057%）含量的17Cr2Ni2MoVNb钢中，V和Nb对热塑性的危害很小。而高N（0.0130%）含量的17Cr2Ni2Mo钢在600～900 ℃及1050～1200 ℃温度区间塑性低于17Cr2Ni2MoVNb钢。N含量及相变温度不同导致第二期AlN析出量不同及铁素体先后析出，是造成两试验钢塑性差别的主要原因。

Hot ductility of 17Cr2Ni2MoVNb and 17Cr2Ni2Mo gear steels at the temperature from 600 to 1200 ℃ was measured on stress/strain thermosimulator Gleeble1500D 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（00057%）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 600900 ℃and 10501200 ℃. The differences in N content and in temperature for phases transformation result in the distinction for precipitation of AlN and αferrite between 17Cr2Ni2MoVNb and 17Cr2Ni2Mo, which in turn influence the hot ductility.

参考文献

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网