陶瓷超硬磨具工作层体积密度的测量

Measuring volume density of working layer of ceramic superhard abrasive tools

依据JB/T 7999—2013《固结磨具体积密度、总气孔率和吸水率试验方法》标准检测陶瓷超硬磨具工作层体积密度,并对其影响因素进行分析。结果表明:检测时取样量应大于0.50g,样品质量减少,体积密度呈下降趋势;当样品体积密度值超过2.85g/cm^3时,可省去抽真空处理操作步骤;当体积密度值在2.50~2.85g/cm^3时,可将抽真空处理操作改为在去离子水中浸泡1h;当体积密度值小于2.50g/cm^3时,需经抽真空处理。

According to JB/T 7999-2013 “Bonded abrasive products-Testing methods for the volume density,general porosity and water absorption”,the volume density of working layer of ceramic superhard abrasive tools was measured,and the influencing factors were analyzed.The results show that when measuring,the sampling quantity should be more than 0.50 g,the sample quantity decreases,the testing results show a downward trend.When the volume density of the sample exceeds 2.85 g/cm^3 ,the vacuum treatment procedure can be omitted.When the volume density ranges from 2.50 to 2.85 g/cm^3 ,the vacuum treatment operation can be changed to soak in deionized water for 1 hour.When the volume density is less than 2.50 g/cm^3 ,it needs to be vacuum treated.