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《Special Casting & Nonferrous Alloys》 2013-06
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Squeezing Casting Zinc Alloy Worm Gear

Zhu Quanli, Zhang Xianman, Wang Guilong, Chen Jiajian (1.School of Mechanical and Auto mobile Engineering, South China University of Technology; 2.Guangdong Hua Jin Advanced Alloys Industrial Company Limited)  
The zinc alloy worm gear was produced by squeezing casting. The microstructure and mechanical properties of the zinc alloy worm gear were investigated by metallurgical microscope and electron universal test machine. The optimized squeezing parameters were presented as follows: holding temperature of 570~630 ℃, both mould and pouring system heated to 150~250 ℃, punching velocity of 5~10 mm/s and pressure of 30~100 MPa for 40~120 s. The results show that the microstructure of the worm gear is obviously refined, and the mechanical properties are increased greatly, meanwhile the quality of zinc alloy worm gear is controlled effectively. Compared with those of permanent mold casting worm gear, tensile strength and elongation of the squeezing casting worm gear are improved by 100MPa and by 139%, respectively.
【CateGory Index】: TG249.2
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