压力容器14Cr1MoR封头热处理工艺及性能试验研究  

Investigation of Heat Treating Process and Performance of 14Cr1MoR Head

作　　者：邵光辉[1] 王立跃[2] 刘智勇 

机构地区：[1]合肥通用机械研究院 [2]安徽机电职业技术学院机械工程系 [3]中石化洛阳工程有限公司

出　　处：《化工机械》2014年第3期304-306,共3页Chemical Engineering & Machinery

摘　　要：研究了压力容器14Cr1MoR封头的热处理工艺,结果表明:高温天气下,采用通常的空冷正火工艺已不能保证14Cr1MoR中厚板封头的力学性能,该工艺下,试板组织分布不均且相对粗大,铁素体(F)和珠光体(P)各自成团析出,铁素体组织被分割,其晶界上布满P,这种组织结构造成试板力学性能特别是冲击韧性较差。采用风冷和喷淋的冷却方式均可以实现对热处理工艺的改进,但风冷后试板的冲击韧性仍较差;喷淋冷却后试板的F、P组织较细且分布均匀,其抗拉强度、冲击韧性均能满足设计要求,综合力学性能得到了质的提升,该种工艺可以保证高温天气下中厚板封头的制造质量,对于实际生产具有重要意义。The heat treatment process of 14Cr1MoR heads was studied to show that,in hot weather,the aircooled normalizing process fails to guarantee mechanical properties of the medium and thick heads; in this process,the microstructure of test plates distributes unevenly and looks coarse relatively,and both ferrite （F） and pearlite （P） precipitates in groups individually,and the ferrite structure can be divided and its grain boundaries is full of pearlite.This microstructure can result in poor mechanical properties of the test plates,especially the impact toughness.Both wind cooling and spray cooling can improve mechanical properties of the test plates,but in the wind cooling,the impact toughness becomes poor,and in the spray cooling,both ferrite and pearlite distributes finely and uniformly,and their tensile strength and impact toughness can meet the design requirements.This makes the comprehensive performance of the test plates improved greatly,and the mechanical properties of medium and thick heads in hot weather can be guaranteed.

关 键 词：14Cr1MoR 封头 正火 空冷 风冷 喷水冷却 

分 类 号：TQ053.2[化学工程]