Paper Title:
The Effect of the Welding Thermal Cycle on Heat Affected Zone Hardening for 500MPa Grade Screw Thread Steel
  Abstract

The hardening behavior of the welding heat affected zone (HAZ) with different heat input for 500MPa grade screw thread steel is investigated in this paper. The single welding thermal cycle was applied to the test steel by a Gleeble-3500 thermal simulator. With the definition of hardness ratio, relative hardness factor and partial hardness zone, the HAZ Max hardness, hardness distribution and hardness mechanism of steel were analyzed. The results show that the HAZ hardness is always higher than the base steel hardness. The hardness ratio is increasing with the heat input decreased. The distribution of relative hardness factor of HAZ can be expressed by the Avrami equation which can describe the distribution of HAZ hardness. The width of partial hardness zone increases rapidly with the heat input increased. But at a certain degree of heat input, the width of partial hardness decreases slightly. The microstructure generated by heat input is the intrinsic factor of the HAZ hardness variation. The HAZ hardness enhances as the martensite content increases. On the contrary the HAZ hardness reduces as the ferrite content enhance on condition the heat input increase or the observed area is far away from the HAZ.

  Info
Periodical
Advanced Materials Research (Volumes 189-193)
Edited by
Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang
Pages
3530-3533
DOI
10.4028/www.scientific.net/AMR.189-193.3530
Citation
J. F. Fang, L. Yang, X. M. Yuan, Y. Z. He, "The Effect of the Welding Thermal Cycle on Heat Affected Zone Hardening for 500MPa Grade Screw Thread Steel", Advanced Materials Research, Vols. 189-193, pp. 3530-3533, 2011
Online since
February 2011
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: Li Yang, Gang Li
Abstract:To improve the wear resistance of ductile cast iron, plasma beam remelt-solidified hardening on the surface is adopted. Scanning electron...
1751
Authors: Li Yang, Ying Huai Qiang, Fu Shan Chen, Yang Gao, Yun Tian Zhong
Surface Engineering/Coatings
Abstract:To improve wear resistance and service life of boron cast iron cylinder, plasma beam hardening on surface is adopted.Scanning electron...
98
Authors: N.I.S. Hussein, Mohamad Nizam Ayof, Tan Huay Kean
Chapter 1: Materials and Technologies of Processing
Abstract:Dissimilar metal welding is widely applied to meet the rquirement of transition in mechanical properties and/or difference in working...
146
Authors: Gancho Genchev, Nikolay Doynov, Ralf Ossenbrink, Vesselin Michailov
Chapter 2: Contributed Papers
Abstract:The paper presents an advanced simulation approach developed for considering the local microstructure properties variation due to multiple...
595