论文部分内容阅读
压力容器设备是国民经济各个部门和人民生活中广泛使用的特殊设备。因为它们的结构形式、操作工艺条件和使用环境的苛刻,并具有爆炸危险,所以加强制造质量控制是非常必要的。压力容器制造中,焊接和热处理是制造工艺中的重要关键工序。焊接时由于局部加热,会在焊件中产生不均匀的温度场和局部压缩塑性应变;在冷却过程中,经受压缩塑性应变部分由于不能自由收缩而受到拉伸,
Pressure vessel equipment is a special equipment widely used in various departments and people’s life in the national economy. Because of their structure, operating conditions and the use of the harsh environment, and has the danger of explosion, so to enhance manufacturing quality control is very necessary. Pressure vessel manufacturing, welding and heat treatment is an important process in the manufacturing process. Due to local heating during welding, a non-uniform temperature field and a local compressive plastic strain will occur in the weldment. During the cooling process, the part subject to compressive plastic strain can not be freely contracted and stretched,