山东科学
山東科學
산동과학
SHANDONG SCIENCE
2012年
1期
51-55
,共5页
锌基合金%锌铝合金%A1-Ti-C-B中间合金%变质处理%组织细化
鋅基閤金%鋅鋁閤金%A1-Ti-C-B中間閤金%變質處理%組織細化
자기합금%자려합금%A1-Ti-C-B중간합금%변질처리%조직세화
zinc-based alloy%zinc-aluminum alloy%AI-Ti-C-B master alloy%modification%refinement
研究了A1-6．53Ti-0．3C-0．46B中间合金（Ti：C〉4：1）对高铝锌基合金的组织和性能的影响，结果表明，加入适量的中间合金可显著细化合金的显微组织，初生富铝Or．相从粗大的树枝晶转变为细小均匀等轴晶，等轴晶尺寸30-50μm。砂型铸造条件下，合金的伸长率从1．7％提高到10．O％，拉伸强度在410MPa左右。金属型铸造条件下，合金的伸长率从1．0％提高到16．O％，拉伸强度约407MPa。尽管组织显著细化，但拉伸强度并没有显著增加。高铝锌基合金组织细化的机理主要通过加入A1．Ti-C，B中间合金增加了异质形核质点。
研究瞭A1-6．53Ti-0．3C-0．46B中間閤金（Ti：C〉4：1）對高鋁鋅基閤金的組織和性能的影響，結果錶明，加入適量的中間閤金可顯著細化閤金的顯微組織，初生富鋁Or．相從粗大的樹枝晶轉變為細小均勻等軸晶，等軸晶呎吋30-50μm。砂型鑄造條件下，閤金的伸長率從1．7％提高到10．O％，拉伸彊度在410MPa左右。金屬型鑄造條件下，閤金的伸長率從1．0％提高到16．O％，拉伸彊度約407MPa。儘管組織顯著細化，但拉伸彊度併沒有顯著增加。高鋁鋅基閤金組織細化的機理主要通過加入A1．Ti-C，B中間閤金增加瞭異質形覈質點。
연구료A1-6．53Ti-0．3C-0．46B중간합금（Ti：C〉4：1）대고려자기합금적조직화성능적영향，결과표명，가입괄량적중간합금가현저세화합금적현미조직，초생부려Or．상종조대적수지정전변위세소균균등축정，등축정척촌30-50μm。사형주조조건하，합금적신장솔종1．7％제고도10．O％，랍신강도재410MPa좌우。금속형주조조건하，합금적신장솔종1．0％제고도16．O％，랍신강도약407MPa。진관조직현저세화，단랍신강도병몰유현저증가。고려자기합금조직세화적궤리주요통과가입A1．Ti-C，B중간합금증가료이질형핵질점。
This paper addressed the effects of AI-6.53Ti-0.3C-0.46B master alloy （Ti： C 〉 4： 1） on the microstructure and mechanical properties of high aluminum-zinc-based alloy. Experimental results show that the addition of the master alloy can significantly refine the microstructure of the high aluminum-zinc-based alloy. The shape of a primary ~ phase grain changes from coarse dendrite into fine and uniform equiaxed crystal. The average size of equiaxed crystal is 30 -50 wm. The extension rate of the alloy increases from t. 7% to ]0.0% and the tensile strength is about 410 MPa in the condition of sand casting （SC）. The extension rate of the alloy increases from ]. 0% to ]6.0% and the tensile strength is about 407 MPa in the condition of permanent mold casting （PMC）. Its tensile strength does not significantly increase though its microstructure is obviously refined. Its refinement mechanism is the increase of heterogeneous nucleus due to the addition of AI-Ti-C-B master alloy.
