AN EFFECT OF GRINDING ON MICROHARDNESS AND RESIDUAL STRESS IN 20MnCr5 FOLLOWING SINGLE-PIECE FLOW LOW-PRESSURE CARBURIZING
Journal Title: Journal of Machine Engineering - Year 2018, Vol 18, Issue 4
Abstract
The aim of the experiment described in the paper was to determine the effect of selected conditions of abrasive machining on the size and distribution of microhardness and residual stresses developed in the technological surface layer of flat specimens made of 20MnCr5 steel. The specimens were subjected to single-piece flow low-pressure carburizing (LPC) and high-pressure gas quenching (HPGQ) in a 4D Quenching chamber, in order to achieve the effective case depth of ECD=0.4 mm. This was followed by grinding the specimens with Quantum and Vortex alumina grinding wheels made by Norton. Cooling and lubricating liquid were supplied to the grinding zone in both cases by the flood (WET) method and by the minimum quantity lubrication (MQL) method. The measurements for each specimen were made twice - after the thermo-chemical treatment and after the grinding. Microhardness and residual stress was measured by the X-ray method sin2Ψ. The final part of the article provides an analysis of the measurement results and presents conclusions and recommendations for further studies.<br/><br/>
Authors and Affiliations
Wojciech STACHURSKI, Krzysztof KRUPANEK, Bartlomiej JANUSZEWICZ, Radoslaw ROSIK, Ryszard WOJCIK
Keywords
Related Articles
- EP ID EP416480
- DOI 10.5604/01.3001.0012.7634
- Views 92
- Downloads 0
APPLICATION OF COMPLEX GAME-TREE STRUCTURES FOR THE HSU GRAPH IN THE ANALYSIS OF AUTOMATIC TRANSMISSION GEARBOXES
In the article was discussed the possibility of structures and information systems complex game trees for the analysis of automatic gearboxes. The purpose of modelling an automatic gearbox with graphs can be versatile,...
SIMULATION FOR INSTABLE FLOATING OF HYDRODYNAMIC GUIDES DURING ACCELERATION AND AT CONSTANT VELOCITY
High speeds and the resulting hydrodynamic pressure lead to significant floating of the linear guides. During this movement, the floating behaviour shows phenomena that can be explained by the Reynolds equation. This pap...
IN-PROCESS CONTROL WITH A SENSORY TOOL HOLDER TO AVOID CHATTER
Hydro-, steam- and gas- turbines, aircraft components or moulds are milled parts with complex geometries and high requirements for surface quality. The production of such industry components often necessitates the use of...
METHOD FOR PREDICTING THE ACCURACY OF ROTATIONAL ELEMENTS MEASUREMENTS USING THE FIVE-AXIS COORDINATE MEASURING SYSTEM
The measurements of solids of revolution are one of the most common task in industrial practice. Therefore it is not surprising, that new solutions dedicated to improve accuracy and acceleration of measurements of rotati...
MODELLING OF A GLASS GATHERER ROBOT ARM WITH A FRICTIONAL DAMPER
A numerical model of a friction damper used for damping vibration in glass gatherer robots was described. The damper with a lance was modelled using finite elements. Primary natural frequency of the system was determine...