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GB3965-83《电焊条熔敷金属中扩散氢测定方法》中规定:焊接时夹具应通水冷却并保证与试样能紧密接触;停焊后2s内试样进入0～20℃的冷却水冷却;从试件焊完到放入收集器内,不超过60s。一、扩散氢测定用的两种焊接夹具 1.采用图1夹具者,如WES1003-1984《焊接接头氢含量测定方法》;IIW-315-68;DIN-8572《中低合金钢焊道金属氢含量测定方法试行规程》。该夹具采用制动螺栓来装卸试样,试样与夹具接触紧密,焊后试块易于卸除;但卸除的速度慢,而且没有水流冷却,焊接热难于导出(国内有些单位加以改进,在夹具中钻通孔以通过冷却水)。
GB3965-83 “welding electrodes deposited metal diffusion hydrogen test method” provides: welding fixture should be water-cooled and ensure close contact with the sample; 2s after welding stop welding into the 0 ~ 20 ℃ cooling water cooling ; From the welding finished into the collector, no more than 60s. First, the proliferation of hydrogen determination with two kinds of welding fixture 1. Figure 1 fixture who, such as WES1003-1984 “Determination of hydrogen content of welded joints”; IIW-315-68; DIN-8572 “low-alloy steel weld metal hydrogen Test methods for determination of content. ” The fixture uses a brake bolt to load and unload a sample, the sample is in close contact with the fixture, and the test piece after welding is easy to disassemble; however, the unloading speed is slow and there is no water flow cooling and the welding heat is difficult to export (some domestic units improve on Through holes in the fixture to pass the cooling water).