t8a

Experimental study of piston material ( T8A steel ) of impactor used in geophysical prospecting

物探冲击器活塞材料（T8A钢）的试验研究

Phenomenon of Austenitic Grain Growth and Graphite Precipitation in T8A ( 80 ) Steel

T8A（80）钢奥氏体的晶粒长大与石墨析出现象

Through the shallow hardening treatment , the steel T8A can have better contact-fatigue resistance to the repeatedimpactload-test and can be used for making the piston of rock drill .

经薄层硬化的T8A钢，可以获得较好的多冲接触疲劳抗力，故有可能作为凿岩机活塞用材。

To research the austenitic grain growth phenomenon of T8A ( 80 ) steel heated in vacuum and analyze the precipitation and growth course of graphite on the sample surface when the steel is slowly heated and cooled .

研究T8A（80）钢在真空加热时奥氏体的晶粒长大现象，分析该钢在缓慢加热和冷却时在试样表面上石墨的析出与长大过程。

By the experiment of magnetic abrasive machining on inner surface of quenched tool steel ( T8A ), some technical findings had been achieved . The material removal and the roughness of the machined parts vary with the duration of grinding , magnetic induction strength and machining clearance .

对淬硬工具钢（T8A）工件内圆表面进行磁性磨料研磨的加工试验，得出了不同的磁感应强度，不同加工间隙，以及不同研磨时间对加工表面粗糙度和研磨量的影响；