摘要
进行了 4、 8BFe30 1 1白铜杆的热型连铸试验 ,在铸型温度 12 30℃、冷却位置 8mm、拉铸速度30mm/min、压头 30mm时 ,可获得表面光洁的 4白铜杆 ;枝晶间距 30～ 4 0 μm ,横向偏析比为 0 .71 压头为 18mm时 ,获得了表面光洁的 8白铜杆 ;枝晶距 4 5～ 5 5 μm ,横向偏析比为 0 .6 3 其σb 为 338～35 3MPa ,δ10 大于 70 % 分析表明 。
Heated mold continuous casting of 4 and 8Fe30 21 1cupronickel rod is performed.The 4 cupronickel rod of shining surface is obtained with mould temperature of 1230℃,cooling distance of 8mm,casting speed of 30mm/min and metal head of 30mm.The dendrite space of the 4 rod is 30～40μm,and the segregation coefficient on transverse cross section is 0.71.The 8 cupronickel rod of shining surface is obtained with otherwise the same conditions except that the metal head is 18mm.The dendrite space of the 8 rod is 45～55μm,and the segregation coefficient on transverse cross secetion is 0.63.The typical tensile strength and elongation of the rods are 338～353MPa and 70%respectively.The results show that the key to the removing of the hot tear is to shorten the solid+liquid zone and move this zone to the adjacent of mold exit.
出处
《广东工业大学学报》
CAS
2002年第1期75-80,共6页
Journal of Guangdong University of Technology
