Improper forging process will also appear large grain or uneven, hardening crack phenomenon, forging cost is higher than the casting flange.
锻造工艺不当也会出现晶粒大或不均，硬化裂纹现象，锻造成本高于铸造法兰。
The results show that high content of impurity elements, segregation along grain boundaries and uneven grain size are main reasons for the surface damage of domestic tungsten targets.
结果显示，杂质元素的含量偏高和沿晶界的偏析以及不均匀的钨晶粒是造成国产钨靶表面损伤的主要原因。
Small deformation in high temperature is easy to cause incomplete recrystallization and bulky and uneven grain. It is hard to eliminate them in subsequent rolling process.
高温小变形时容易发生不完全再结晶，造成晶粒粗大且不均匀，在随后的轧制过程中很难消除。
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