Novel sloping plate process for semisolid metal forming
Novel sloping plate process for semisolid metal forming
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DOI：
10.1179/174328407x168919
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发表时间：
2007-04
影响因子：
1.8
通讯作者：
R. Guan;C. Wang;Z. Xing;Chun‐Sing Lee;Frank Y. Hu
中科院分区：
文献类型：
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作者：
R. Guan;C. Wang;Z. Xing;Chun‐Sing Lee;Frank Y. Hu
采用一种新型波浪形斜板制备半固态合金。通过冷却或预热斜板制备半固态坯料和浆料。在该工艺制备半固态合金的过程中，枝晶的破裂成核和断裂产生了种子晶，并形成了细小的球形组织。浇注温度、倾斜板长度、冷却倾斜角度是影响组织的主要因素。在目前的实验条件下，建议Al-3 wt-%Mg合金的铸造温度范围为660 ~ 690℃，Al-6Si-2Mg （wt-%）合金的铸造温度范围为660 ~ 680℃，以制备高质量的半固态坯料。提出了制备Al-6Si-2Mg （wt-%）料浆的合理工艺条件：斜板预热温度为300℃，浇注温度为680℃。得到了制备1Cr-18Ni-9Ti不锈钢半固态方坯的最佳工艺条件：斜板长度为640 mm，浇注温度为1600℃。
A novel sloping plate with wavelike surface was used to prepare semisolid alloy. Semisolid billets and slurries have been prepared by cooling or preheating the sloping plate. During preparation of the semisolid alloy by the proposed process, seed crystals derive from burst nucleation and breaking of dendrite and the coaction causes fine spherical microstructure formation. Casting temperature, sloping plate length, degree of cooling sloping angle are the main factors influencing the microstructure. Under current experimental conditions, in order to prepare good quality semisolid billets, proper casting temperature ranges of 660–690°C for Al–3 wt-%Mg alloy and 660–680°C for Al–6Si–2Mg (wt-%) alloy are suggested. The reasonable technological conditions for preparing Al–6Si–2Mg (wt-%) slurry are also proposed: the sloping plate preheating temperature is 300°C, and the casting temperature is 680°C. The optimum conditions for preparing semisolid billet of 1Cr–18Ni–9Ti stainless steel were obtained: the sloping plate length is 640 mm, and the casting temperature is 1600°C.