CAJ | 학술논문

采用光学显微镜(OM)、扫描电镜(SEM)、X 射线衍射仪(XRD)和直读光谱仪等分析测试方法研究 Al-3B中间合金添加量对再生铝合金A356中杂质铁含量的影响。结果表明：经过净化后再生铝合金中铁含量随着Al-3B合金添加量的增加而降低，同时晶粒也得到了细化。当Al-3B中间合金添加量为3%(质量分数)时，铁含量从0.96%降低到0.68%，除铁率为29.1%，再生铝合金A356的抗拉强度和伸长率分别提高了20.5%和38.6%。再生铸造铝合金中铁含量降低的主要原因是Al-3B合金的B元素和再生铝合金A356中的Fe反应生成Fe2B沉于炉底。
채용광학현미경(OM)、소묘전경(SEM)、X 사선연사의(XRD)화직독광보의등분석측시방법연구 Al-3B중간합금첨가량대재생려합금A356중잡질철함량적영향。결과표명：경과정화후재생려합금중철함량수착Al-3B합금첨가량적증가이강저，동시정립야득도료세화。당Al-3B중간합금첨가량위3%(질량분수)시，철함량종0.96%강저도0.68%，제철솔위29.1%，재생려합금A356적항랍강도화신장솔분별제고료20.5%화38.6%。재생주조려합금중철함량강저적주요원인시Al-3B합금적B원소화재생려합금A356중적Fe반응생성Fe2B침우로저。
The effects of Al-3B master alloy additions on the impurity iron content of the recycled casting aluminum alloy A356 were investigated by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffractometry (XRD) and direct reading spectrometry. The results show that the iron content of the recycled aluminum alloy A356 decreases with increasing Al-3B master alloy addition, and the microstructure is fined. The iron content is reduced from 0.96%to 0.68%(mass fraction) when Al-3B master alloy addition is 3%(mass fraction), and its removal rate is 29.1%. The tensile strength and elongation of the recycled casting aluminum alloy increase by 20.5%and 38.6%, respectively. The chemical reaction between boron and iron in the recycled aluminum alloy A356 to form Fe2B is the main reason for the decrease of the iron content.