(1. 燕山大学 材料科学与工程学院, 秦皇岛 066004;
2. 戴卡轮毂制造有限公司,秦皇岛 066000)
摘 要: 采用扫描电镜,对ZL101合金的Sr变质效果与保温时间、Sr含量及晶粒尺寸的关系进行了研究。结果表明:ZL101共晶硅的Sr变质具有长效性,且达到最佳变质效果前有一时间间隔;加入的Sr量有一临界值,超过此值,变质效果变化不明显;若共晶硅越细小,变质效果则越好,达到最佳变质效果的时间也随之缩短。
关键字: ZL101合金; 变质处理; TPRE机制; 晶粒细化
(1. College of Materials Science & Engineering, Yanshan University,
Qinhuangdao 066004, P.R.China;
2. Dicastal Wheel Manufacturing Ltd, Qinhuangdao 066000,P.R.China)
Abstract: The relationship of Sr-modification effect with holding time, Sr content and grain size of ZL101 alloys was carried out by means of SEM. The results indicate that the Sr modification has long effect and there exists a period when the Sr modification reaches the maximum in the ZL101 alloys. For the addition of Sr exists a critical point. When exceeding it, the effect of Sr modification has not almost altered. The finer the hypoeutectic Si,the more the effect of Sr modification is
Key words: ZL101 alloys; Sr modification; TPRE mechanism; grain refining