用喷射成形工艺制备的细珠光体超高碳钢在共析转变温度以下变形时,呈现强烈而持续的加工软化.组织检测表明,渗碳体片表现出与相邻铁素体协凋变形的能力;随着应变增大,渗碳体片发生局部溶解而碎化;在应变足够大时,珠光体逐步转变为细小碳化物颗粒弥散分布的球化组织.细珠光体的这种特性使得这种材料无需预先球化处理,即可具有伸长率达300%的超塑变形能力.
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