厦门理工学院学报
廈門理工學院學報
하문리공학원학보
JOURNAL OF XIAMEN UNIVERSITY OF TECHNOLOGY
2012年
4期
28-32
,共5页
镁合金AM60%半固态成形%固相率%计算机辅助热分析
鎂閤金AM60%半固態成形%固相率%計算機輔助熱分析
미합금AM60%반고태성형%고상솔%계산궤보조열분석
AM60 alloys%semisolid forming%solid rate%CATA
在半固态成形工艺中,对温度的波动幅度较小的初始固相率的选择是顺利实施半固态成形工艺的先决条件.借助计算机辅助热分析方法,通过试验研究镁合金AM60固相率与温度的关系,结果表明,镁合金AM60固相率对温度的变化极为敏感,当初始固相分数从20%过渡到30%,初始固相率波动幅度为（12.8%～19.2%）/℃;当初始固相分数从30%过渡到40%,初始固相率波动幅度为（7.8%～10.4%）/℃;当温度在577.9～589.9℃区间内,镁合金AM60固相分数则始终维持在62%上下.因此,镁合金AM60半固态成形工艺中,其合理的初始固相率为62%.
在半固態成形工藝中,對溫度的波動幅度較小的初始固相率的選擇是順利實施半固態成形工藝的先決條件.藉助計算機輔助熱分析方法,通過試驗研究鎂閤金AM60固相率與溫度的關繫,結果錶明,鎂閤金AM60固相率對溫度的變化極為敏感,噹初始固相分數從20%過渡到30%,初始固相率波動幅度為（12.8%～19.2%）/℃;噹初始固相分數從30%過渡到40%,初始固相率波動幅度為（7.8%～10.4%）/℃;噹溫度在577.9～589.9℃區間內,鎂閤金AM60固相分數則始終維持在62%上下.因此,鎂閤金AM60半固態成形工藝中,其閤理的初始固相率為62%.
재반고태성형공예중,대온도적파동폭도교소적초시고상솔적선택시순리실시반고태성형공예적선결조건.차조계산궤보조열분석방법,통과시험연구미합금AM60고상솔여온도적관계,결과표명,미합금AM60고상솔대온도적변화겁위민감,당초시고상분수종20%과도도30%,초시고상솔파동폭도위（12.8%～19.2%）/℃;당초시고상분수종30%과도도40%,초시고상솔파동폭도위（7.8%～10.4%）/℃;당온도재577.9～589.9℃구간내,미합금AM60고상분수칙시종유지재62%상하.인차,미합금AM60반고태성형공예중,기합리적초시고상솔위62%.
The initial solid rate and its little fluctuations with temperature was the prerequisite for semi-solid formability.A research was implemented through an experiment based on the computer aided thermal analysis,which achieved the quantitative relationship between the semisolid solid-phase rate and temperature.It is shown that the solid-phase rate of AM60 alloys is extremely sensitive to its temperature that initial solid rate fluctuate from 12.8% to 19.2%/℃ when the solid-phase rate of the alloys changed from 20% to 30%,and from 7.8% to 10.4%/℃ when the solid-phase rate of the alloy changed from 30% to 40%,and the temperature range from 577.9℃ to 589.9 ℃,when the solid rate is always maintained at around 62%.The result indicates that the proper initial solid rate should be 62%.
