调质处理对CT80连续油管用钢应变疲劳行为的影响  

Effect of Quenching and Tempering on Strain-Fatigue Behavior of CT80 Grade Coiled Tube Steel

作　　者：王鑫[1] 饶添荣 朱涛[2] 何宜柱[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,马鞍山243002 [2]马鞍山钢铁股份有限公司技术中心,马鞍山243000

出　　处：《机械工程材料》2013年第7期58-63,共6页Materials For Mechanical Engineering

摘　　要：对CT80连续油管用钢分别进行950℃淬火和550℃或650℃回火的调质热处理;通过轴向低循环疲劳试验,对比了不同调质工艺处理后试验钢的疲劳性能,并对断口形貌进行分析。结果表明:淬火温度950℃、回火温度650℃的调质处理工艺能够有效地提高CT80连续油管用钢疲劳性能;其疲劳裂纹起源于试样表面,且呈多源性特征。The specimens of CT80 grade coiled tube steel were treated at 950 ℃ quenching＋ 550 C tempering, and 950℃ quenching＋ 650 ℃ tempering, respectively. By tests of axial low cycle fatigue, the fatigue properties of samples after different processes of quenching and tempering were compared. And the fracture morphology was analyzed. The results show that the processing techniques of 950 ℃ quenching and 650℃ tempering can improve the fatigue property of CT80 steel effectively. The fatigue cracks originated from the sample surface and had multi-fatigue source characteristic.

关 键 词：调质处理 CT80连续油管用钢 应变疲劳 断口形貌 

分 类 号：TG111.8[金属学及工艺—物理冶金] TG113.25[金属学及工艺—金属学]