摘要
采用拉伸试验及SEM等试验方法，研究了不同临界区淬火温度、保温时间对X80抗大变形管线钢拉伸性能的影响规律，分析了每种工艺下的微观组织，制定了适合于X80抗大变形管线钢的临界区热处理工艺。研究结果表明：经780—800℃保温30～40min、820℃保温20min、840℃保温10min的试样。铁素体加马氏体双相组织中马氏体体积分数在10％～13％范围内，拉伸曲线呈连续屈服，强度满足X80抗大变形管线钢标准要求，同时具有优异的变形性能。
The effect of quenching temperature and holding time at different critical zone on tensile property of X80 pipeline steel with high deformation resistance were studied by means of tensile tests and SEM. By analyzing microstructures in different heat treatment process, the suitable process of XSO pipeline steel with high deformation resistance were designed. The results showed that while quenching at 780 - 800 ℃ for 30 - 40 mins, 820 ℃ for 20 mins, 840 ℃ for 10 mins, martensite volume fraction in ferrite plus martensite dual-phase microstructure was within 10% - 13%, the tensile curve presented good continuous yielding, whose strength could meet requirements and the deformation property was best.
出处
《南钢科技与管理》
2013年第2期1-5,20,共6页
NISCO Technology and Management
关键词
X80抗大变形管线钢
淬火温度
保温时间
纵向拉伸性能
微观组织
X80 pipe steels with high deformation resistance
quenching temperature
holding time
longitudinal tensile property
microstructure
