称取项目设计型号为1#、2#、3#、4#、5#、6#的银钎剂，在电阻炉内进行钎剂去膜能力测试，试验结果如图所示。6#活性温度较低，在550℃时保温3min已全部流铺开，并具有去膜能力；1#至5#钎剂虽然在550℃也开始具有去膜能力，但其流动稍差；保温时间不变，继续升高温度至700℃，1#至5#钎剂保护效果不断提高；继续升高温度，因保温时间较长，钎剂开始失效。因此，6#银钎剂的活性温度较低、去膜能力较强。

Weigh the silver fluxes with the project design models 1#, 2#, 3#, 4#, 5#, 6#, and test the flux removal ability in the resistance furnace. The test results are shown in the figure. 6# has a low active temperature, it has been fully spread out after 3 minutes of heat preservation at 550°C, and has the ability to remove the film; although the flux 1# to 5# also has the ability to remove the film at 550°C, its flow is slightly worse; The time remains the same. Continue to increase the temperature to 700℃, and the protective effect of 1# to 5# flux will continue to improve; continue to increase the temperature, and the flux will begin to fail due to the longer holding time. Therefore, 6# silver flux has lower active temperature and stronger film removal ability.