超硬磨料+人造金刚石和立方氮化硼微粉

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1、0ICS25.100.70J43备案号：36621—2012中华人民共和国机械行业标准JB/T7990—2012代替JB/T7990—1998超硬磨料人造金刚石和立方氮化硼微粉Superabrasive—Syntheticdiamondandcubicboronnitridemicropowder2012-05-24发布2012-11-01实施中华人民共和国工业和信息化部发布中华人民共和国机械行业标准超硬磨料人造金刚石和立方氮化硼微粉JB/T7990—2012*机械工业出版社出版发行北京市百万庄大街22号邮政编码：100037*210mm×297mm·0.5印张·15

2、千字2012年12月第1版第1次印刷定价：12.00元*书号：15111·10718网址：http：//www.cmpbook.com编辑部电话：（010）88379778直销中心电话：（010）88379693封面无防伪标均为盗版版权专有侵权必究JB/T7990—2012目次前言..................................................................................................................................................

3、....................II1范围................................................................................................................................................................12规范性引用文件.............................................................................................

4、...............................................13技术要求........................................................................................................................................................13.1粒度标记..........................................................................

5、.......................................................................13.2尺寸范围和粒度分布.............................................................................................................................13.3颗粒形状......................................................................

6、...........................................................................23.4杂质.........................................................................................................................................................24检验方法...............................................

7、.........................................................................................................24.1取样.........................................................................................................................................................24.2粒度分布检验....