晶界角度测试结果表明，保温后亚晶的平均晶界角度随析出相间距而增大。
The results indicated that the boundary angle of subgrains increases with the precipitate spacing after holding.
从焊缝处的发现的晶粒内存在的大量多边形化的亚晶的现象推断出出现问题的工艺段，通过改进，消除了弯管成型开裂的情况。
We found the place where the processing set-up was wrong by analysing the phenomenon and solved the cracking problem through the improvement.
在高温下制取的wc粉，结晶完整，晶内亚结构粗大，微观应变小。
WC powders prepared at higher temperatures are characterized by complete sintering, coarse substructure and slight micro-strain.
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