ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The experiments are performed to study the hardness layer depth at work piece differentsurface zone in grinding. The result is that hardness layer depth is various at work piece differentsurface zone. The hardness layer depth is thinner at cutting-in grinding zone, deeper at middlegrinding zone and deepest at cutting-off grinding zone. In order to analyze the cause of hardness depthvariation, the grinding temperature field is simulated by means of finite element method. From thetemperature field and heat flux simulation, the cause of the hardness depth variation is that thegrinding heat flux is variable at different grinding zone along the work piece surface ingrind-hardening. At cutting-in zone, most of grinding heat flows into the front-below work piece partinverse to table speed, the depth that temperature of surface layer higher than austenite temperature isthin and there is slim martensite transformation layer. At middle zone, the temperature of surfacelayer is higher than austenite temperature because of grinding heat accumulated in the surface layer,and martensite transformation takes place after cooling. At cutting-off zone, most of grinding heatflows into the below work piece part because of work piece boundary, and hardness depth is deeperthan that at middle zone
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.24-25.333.pdf
