Paper Title:
Temperature Distribution, Phase Transformations and Residual Stresses in Heat Treatment of Grinding Balls
  Abstract

The goal of this work is to model the temperature distribution, phase transformation and residual stresses induced during the heat treatment of 3 and 5 inches diameter grinding balls. In the first step, the radial distribution of temperature inside the balls was calculated and validated experimentally. During the quenching, the model considers factors such as the heating of the water and the formation of a steam layer that surrounds the balls in the beginning of the treatment. In a second step, with the temperature distribution, the CCT curves of the steel and the Koistinen- Marburger equation, the radial distribution of martensite was determined during the heat treatment. Finally, in the third step, the residual stresses field was modeled considering the temperature distribution, the force equilibrium equations and the constitutive thermo-elastic relationships, where the expansion due to the austenite – martensite transformation was included. In the temperature distribution, a good experimental-theoretical agreement was obtained, with differences at the end of the quenching no higher than 0,5 %. Respect to the residual stresses, the model indicates that the maximum tensile values occur at certain depth below the surface of the balls and the experimental evidence of the behavior of the balls in a mill simulator, as well as the measured residual stresses by means of DRX shows an acceptable agreement with the theoretical predictions.

  Info
Periodical
Materials Science Forum (Volumes 539-543)
Main Theme
Edited by
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
Pages
2234-2239
DOI
10.4028/www.scientific.net/MSF.539-543.2234
Citation
C. Camurri, C. Carrasco, J. Dille, "Temperature Distribution, Phase Transformations and Residual Stresses in Heat Treatment of Grinding Balls", Materials Science Forum, Vols. 539-543, pp. 2234-2239, 2007
Online since
March 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Wen Xu Zhang, Cheng Zu Ren, F. Zheng, Xin Min Jin
471
Authors: Yi Sun, Wen Tao Wang, Ming Feng Dong, Ya Lang Mao
Abstract:Through the analysis of the interaction form between steel balls and the material in Micro-level, the primary form in different areas...
247
Authors: Xian Ying Feng, Hui Li, Ming Jun Yue, Yan Ying Su
Chapter 3: Advanced Manufacturing Technology (1)
Abstract:Globoidal continuous cam with ball is a new type of transmission mechanism which can realize rolling instead of sliding. By designing the...
1254
Authors: Ping Zhou, Jing Hong Du, Xi Xiang Duan
Chapter 2: Mechanical Engineering and Applied Mechanics
Abstract:Based on Discrete Element Method(DEM), movements of steel balls in ball mill were simulated by Particle Flow Code in three Dimensions (PFC...
115
Authors: Ping Zhou, Jing Hong Du, Xi Xiang Duan
Chapter 2: Mechanical Engineering and Applied Mechanics
Abstract:Based on Discrete Element Method(DEM), initial state models of steel balls were establisheded by Particle Flow Code in three Dimensions (PFC...
120