论文部分内容阅读
最近,国外试验了两种新淬火剂——硫酸铜水溶液。其成分是:1、250克/升 CuSO_4·5 H_2O+75克/升 H_2SO_4(比重1.82);2、30克/升 CuSO_4·5H_2O+100毫升 NH_4OH(25%浓度)+120克/升 H_2C_2O_4(草酸)+35克/升 NaF+H_3PO_4到 pH3.5。为了测定这两种淬火剂的冷却速度,用直径4.5毫米的 GCr15钢球做试样,将铬铝热电偶焊在钢球中心,试样在电炉内加热到860℃,
Recently, two new quenching agents were tested abroad - copper sulfate aqueous solution. The composition is as follows: 1,250 g / l CuSO 4 · 5H 2 O + 75 g / l H 2 SO 4 (specific gravity 1.82); 2,30 g / l CuSO 4 · 5H 2 O + 100 ml NH 4 OH (25%) +120 g / l H 2 C 2 O 4 Oxalic acid) + 35 g / L NaF + H 3 PO 4 to pH 3.5. In order to determine the cooling rate of these two quenching agents, with a diameter of 4.5 mm GCr15 steel ball as a sample, the chrome aluminum thermocouple welded to the center of the ball, the sample was heated to 860 ° C in an electric furnace,