[机械标准]JBT 8893-1999 内燃机 气门座 金相检验.pdf

ICS 77.040.20;27.020 J 93 JB/T 8893－1999 内燃机 气门座 金相检验 Metallographie test for valve seat of internal combustion engines 1999-09-17 发布 2000-01-01 实施 国 家 机 械 工 业 局 发 布 JB/T 8893－1999 目 次 前言 1 范围····················································································································································································································1 2 引用标准·········································································································································································································1 3 要求····················································································································································································································1 4 试验方法与检验规则···············································································································································································2 5 金相组织评定·······························································································································································································2 I JB/T 8893－1999 前 言 本标准由全国内燃机标准化技术委员会提出并归口。 本标准起草单位：上海内燃机研究所、邯郸内燃机配件厂。 本标准主要起草人：李绍裘、赵世群、卢纪申。 II 中 华 人 民 共 和 国 机 械