中国有色金属学报(英文版)
中國有色金屬學報(英文版)
중국유색금속학보(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
11期
3421-3428
,共8页
陈添%解志文%罗荘竹%杨钦%谭生%王赟姣%罗一旻
陳添%解誌文%囉荘竹%楊欽%譚生%王赟姣%囉一旻
진첨%해지문%라장죽%양흠%담생%왕빈교%라일민
AZ61镁合金%挤压铸造%二次重熔%力学性能
AZ61鎂閤金%擠壓鑄造%二次重鎔%力學性能
AZ61미합금%제압주조%이차중용%역학성능
AZ61 magnesium alloy%squeeze casting%partial remelting%mechanical properties
采用挤压铸造后直接二次重熔的方法制备半固态AZ61镁合金。首先通过挤压铸造预成形铸态AZ61镁合金,以获得细小的枝晶;然后在半固态区间进行二次重熔,细小的枝晶演变成球状晶,完全球化的晶粒被液相均匀包裹。研究结果表明:通过挤压铸造预成形的铸态AZ61镁合金与传统铸造预成形的铸态AZ61镁合金相比,在相同的二次重熔条件下,挤压铸造预成形的铸态AZ61镁合金获得更细小的半固态组织。此外,挤压铸造加上二次重熔触变成形的AZ61镁合金,力学性能优于传统铸造后二次重熔触变成形的AZ61镁合金。
採用擠壓鑄造後直接二次重鎔的方法製備半固態AZ61鎂閤金。首先通過擠壓鑄造預成形鑄態AZ61鎂閤金,以穫得細小的枝晶;然後在半固態區間進行二次重鎔,細小的枝晶縯變成毬狀晶,完全毬化的晶粒被液相均勻包裹。研究結果錶明:通過擠壓鑄造預成形的鑄態AZ61鎂閤金與傳統鑄造預成形的鑄態AZ61鎂閤金相比,在相同的二次重鎔條件下,擠壓鑄造預成形的鑄態AZ61鎂閤金穫得更細小的半固態組織。此外,擠壓鑄造加上二次重鎔觸變成形的AZ61鎂閤金,力學性能優于傳統鑄造後二次重鎔觸變成形的AZ61鎂閤金。
채용제압주조후직접이차중용적방법제비반고태AZ61미합금。수선통과제압주조예성형주태AZ61미합금,이획득세소적지정;연후재반고태구간진행이차중용,세소적지정연변성구상정,완전구화적정립피액상균균포과。연구결과표명:통과제압주조예성형적주태AZ61미합금여전통주조예성형적주태AZ61미합금상비,재상동적이차중용조건하,제압주조예성형적주태AZ61미합금획득경세소적반고태조직。차외,제압주조가상이차중용촉변성형적AZ61미합금,역학성능우우전통주조후이차중용촉변성형적AZ61미합금。
A novel process that combines squeeze casting with partial remelting to obtain AZ61 magnesium alloy with semi-solid microstructures was proposed. In this route, the squeeze casting was used to predeform the magnesium alloy billets to obtain small dendritic structures. During subsequent partial remelting, small dendritic structures transform into globular grains surrounded by liquid films. The results show that the squeeze casting AZ61 alloy after partial remelting produces more ideal, finer semi-solid microstructure compared with as-cast AZ61 alloy treated by the same isothermal holding conditions. Moreover, the mechanical properties of the thixoformed AZ61 alloy prepared by squeeze casting plus partial remelting are better than those of the thixoformed alloy prepared by conventional casting plus partial remelting.