A crack is found after SR heat treatment in the vertical welding fusion line for water distribution ring pipe of a electric machinery.
某设备制造厂电机配水环管立缝在消除应力热处理后，熔合线附近出现裂纹。
Proper Sr addition can improve effectively the hot-crack resistantnce of Ca-containing Mg alloy.
适量锶的加入有效地提高了合金的抗热裂性能。
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