摘要
Q345R+022Cr19Ni10(94+4)复合钢板锥体在1030℃加热成形,950℃终止成形后覆层喷水,基层空冷,其基层力学性能试验-20℃冲击韧性不合格,金相检查为网状分布的多边形铁素体+岛状组织和少量珠光体,晶粒度为9级。重新加热至成形温度浸水冷却,并在700℃回火,获得回火贝氏体组织,结果冲击韧性大幅提高,满足标准和设计要求。
The impact toughness under -20 ℃mechanical properties test of Q345R＋022Cr19Ni10（94＋4） clad plate cone base metal is unqualified after hot forming at 1030~950℃with air cooling for base metal and water cooling for alloy cladding.The microstructure is polygonal ferrite＋island structure and small quantity of pearlite.The grain size is 9 grade.After reheating to the hot forming temperature,cooling in the water and tempering at 700 ℃ the tempered bainite is received.The impact toughness highly in-creased and met the standard and design requirements.
出处
《压力容器》
2014年第10期29-33,共5页
Pressure Vessel Technology
关键词
厚壁锥体
热成形
冷却速度
网状铁素体
魏氏组织
力学性能
thick wall cone
hot forming
cooling rate
network ferrite
widmanstaten structure
mechanical property
