研究了AZ31合金的铸锭组织及其退火工艺，为AZ31镁合金由铸态组织直接塑性变形提供了一定的参考依据。
As-cast microstructure of Mg alloy AZ31 ingot and its annealing technology have been researched hence certain reference for direct plastic deformation from as-cast microstructure of Mg alloy AZ31.
重点分析了球墨铸钢铸态、退火、正火、锻造后的组织特征。
The microstructure morphology of spheroidal graphite cast steel after as-casting, annealing, normalizing, forging was investigated emphatically in this paper.
结果表明：加镍低碳高合金钢无论退火态还是淬火回火态，其组织均为单相板条马氏体；
The results show that as-annealed microstructure and as-quenched-tempered microstructure of the low carbon high alloy steel added nickel are both single-phase lath martensite.
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