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1985年6月200t油压机立柱因活动横梁铸铁套破碎,被拉伤严重,在300×140mm面积内,连续拉伤,伤痕深度0.05～2.5mm。经过讨论采用锡铋合金钎焊进行焊补,具体方法: 1.焊前准备将油压机立柱取下平放,除去油污,先用金属洗净剂将油污清洗几遍,用碎锯条、三角刮刀剔出拉痕深处油污及金属末,再用丙酮洗净。在镀铜前用50%蒸馏水配50%HCl(盐酸)(重量比)清洗液清洗。 2.镀铜清洗前先配好镀铜液。镀铜液的成分是:32%HCl、4%Zn(粒状)、58%H_2O(蒸馏水)、6%CuSO_4(结晶)。配镀铜液要注意,先将4%
In June 1985, the 200t hydraulic press column was severely damaged due to the breaking of the movable beam cast iron cover. In the area of 300×140mm, it was continuously stretched and the depth of the flaw was 0.05-2.5mm. After discussion, using tin-bismuth alloy brazing for welding repair, the specific methods: 1. Prepare the welder before removing the hydraulic press column and lay it flat to remove oil stains. Use a metal detergent to clean the oil stain several times. Use a broken saw blade and a triangular blade to remove. Draw marks deep in the oil and metal, and then wash with acetone. Before copper plating, wash with 50% distilled water and 50% HCl (hydrochloric acid) (by weight) cleaning solution. 2. Plating copper before cleaning with copper plating solution. The composition of the copper plating solution is: 32% HCl, 4% Zn (granular), 58% H 2 O (distilled water), and 6% CuSO 4 (crystalline). With copper plating liquid to pay attention, first 4%