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12500kva zi tong ji dian huan zhu zao que xian de han bu
Author(s): 
Pages: 41
Year: Issue:  6
Journal: Welding Technology

Keyword:  VA铸造缺陷集电环焊接工艺铜合金浇铸过程输出电压碳弧尺寸图焊接材料;
Abstract: <正> 用于Si、Mn合金冶炼的12500kVA紫铜集电环,其输入电压为10000V,输出电压为110V,由两个半圆环及翅板组成。该集电环由含铜90%以上的铜合金浇铸而成,其总重量为867ks。在浇铸过程中产生了大面积疏松,某些关键部位还出现较大尺寸的缩孔,未达到承受高压所应满足的条件,若重新熔化浇铸将导致较大损失。我们采用焊补的方法对大面积疏松和缩孔进行修复,取得较大的经济效益,焊补大型铜件获得了成功。 1 焊接工艺
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