硅对压铸模与铝合金相互作用的影响

Effect of Si on the Interaction between Die Casting Die and Aluminum Alloy

为了研究压铸模与铝合金的相互作用 ,探讨Si对压铸模与铝铸件焊合倾向性的影响 ,进行了热浸铝试验。试验结果表明 ,模具钢在纯铝熔体中热浸时 ,主要形成Fe2 Al5相层和针片状的FeAl3 相 ,Fe2 Al5相是反应扩散的主导相。模具钢在A3 80合金中热浸时 ,主要形成FeSiAl3 和Fe2 Al5两种相层。由于Si降低了Al在FeSiAl3 相层中的活度 ,减少了从铝熔体向Fe2 Al5相供应的铝原子数 ,从而抑制了Fe2 Al5相的快速生长。因而 ,Si减弱了铝合金熔体与模具钢间的相互作用 ,从而降低压铸合金的焊合倾向性。热浸温度降低 ,Si对Fe2

The experiment of hot dip aluminizing had been carried out in order to study the interaction between die casting die and aluminum alloy and the effect of Si on soldering tendency between die and aluminum alloy casting. The experimental results show that Fe 2Al 5 phase layer and FeAl 3 phase are formed when samples of die steel are dipped in pure Al melt, and Fe 2Al 5 phase is the predominant phase of reaction diffusion. Two phase layers of FeSiAl 3 and Fe 2Al 5 are formed when samples are dipped in ...