3. High cooling rate in semi-continuous casting, diffusive process in solid phase is difficult, chemical composition and microstructure heterogeneity are easy to form in ingot, such as intragranular segregation, which reduces plasticity.
4、铸锭外观有偏析浮出物、夹渣、结疤和裂纹等缺陷时,应进行铣面(见有色金属合金锭坯铣面)关键词排名,这是保证制品优秀外观质量的一个紧张因素