去应力退火试样上发现了平行轧面的深沟，且沿晶开裂不明显。
The intergranular cracking in relieved-stress annealing samples is not obvious.
焊接工艺严谨，框架焊接的整体去应力处理，减少变形，检测设备完善。
Welding welding process is rigorous, the framework of the whole to deal with the stress, reduce the deformation, perfect testing equipment.
结果表明：加工以后使应力重新分布和使残余应力降低或均匀化，冷热循环去应力处理效果很小。
The results indicated that after machining the stress is re arranged and the residual stress decreases; the effect of thermal cycle stress relief treatment is little.
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