I am now in the company do DR copper valves are exported to Australia, has very strong corrosion resistance, but the recent copper DR copper factory to us out of the question, the copper cut directly to do DR test (put the material in a certain percentage of water and chloride in water temperature of 70 degrees for 24 hours) when no problem, after forging red hair embryo are detected substandard, and after tempering more serious problems.DR copper: through the special metal proportion, let the zinc in the alloy copper not easy to drain away, reach the higher corrosion resistanceNow the copper bar factory to shirk responsibility said that our side red copper forging, good crushing or what, but according to Australia to us saying that would be better compactness of metal forging, copper corrosion depth is 300 wire, corrosion depth of products is less than 100. StopThe copper ratio is wrong, which is 61%-62%
Arguably, the red stamping for corrosion resistance only benefits, perhaps the red stamping when the heating temperature is too high. According to the patent claim, red forging as long as the use of kerosene combustion, spray flame, chopped copper can be heated to redness, just a few minutes, and then the large forging press forging 630 tons.
The DR content of copper: copper CU (60-63%), lead (1-2.2%), Pb Zn (Yu Liang), zinc iron (Fe < 0.2%), Sn (0.15%), aluminum tin (Al < 0.05%), As (0.02-0.25%), arsenic impurity (less than or equal to 0.3%)
Arguably, the red stamping for corrosion resistance only benefits, perhaps the red stamping when the heating temperature is too high. According to the patent claim, red forging as long as the use of kerosene combustion, spray flame, chopped copper can be heated to redness, just a few minutes, and then the large forging press forging 630 tons.
