【摘要】 研究了热处理、压力加工及定向凝固等热加工工艺对ZLSi7MgA合金导电性能的影响。研究表明 :压力加工使硅相沿变形方向的相对分布发生变化 ;定向凝固工艺可以获得两相平行生长的理想柱状晶组织 ,其一次轴方向与电场方向一致 ;提高时效温度能够促使G·P区从中间相到平衡沉淀相的过渡 ,消除了沉淀相周围基体中的畸变。上述工艺均有利于提高合金的导电性能。通过调整时效温度适当提高ZLSi7MgA合金的电导率 ,是兼顾合金的强度和导电性 ,满足工程要求的行之有效的工艺方法。更多还原

【Abstract】 The effect of heat working technologies, heat treatment, press working and solidifying alone the definite direction etc. on electrical conductivity of ZLSi7MgA alloy was studied. The results shows that, press working makes the relative distribution of silicon phases alone the deformed direction take place change; the ideal columnar crystal can be obtained by technology solidifying alone the definite direction; the raising aging temperature can impel the transition from middle phases to equilibrium precipitate phases, and eliminate the distortion of matrix round the precipitate phases. Above mentioned technologies all can raise the alloy electric conductivity. The engineering need can be satisfied to both the strength and electric conductivity through suitable rising ageing temperature to improve the alloy electrical property.更多还原