Standard No.:	JB/T 9745-1999
English Name:	Internal combustion engines -- Individually cast rings with boron -- Metallographic examination
Chinese Name:	内燃机 硼铸铁单体铸造活塞环 金相检验
Chinese Classification:	J92    Engine body and moving parts
Professional Classification:	JB    Professional Standard - Machinery
Issued by:	National Technical Committee on Internal Combustion Engine Standardization
Issued on:	1999-09-17
Implemented on:	2000-1-1
Status:	superseded
Superseded by:	JB/T 6016.5-2011 Internal combustion engines — Piston rings — Metallographic inspections —Part 5：For boracic cast iron piston rings by individual cast
Superseded on:	2011-8-1
Abolished on:	2011-08-01
Superseding:	NJ 325-1984
Language:	English
File Format:	PDF
Word Count:	7500 words
Price(USD):	450.00
Delivery:	via email in 1~3 business day

JB/T 9745-1999 本标准是对 NJ 325-84《内燃机硼铸铁单体铸造活塞环 金相检验》的修订。修订时仅按有关规定作了编辑必修改，主要技术内容没有改变。 本标准规定了内燃机硼铸铁单体铸造活塞环的金相组织的技术要求、检验规则及评级标准。 本标准适用于气缸直径 160mm 以内的内燃机硼铸铁单体铸造活塞环金相组织检验和评级。 本标准于 1984 年首次发布。