Specifications

Corresponding author: Xu, J. ([e-mail])
Source title: Hanjie Xuebao/Transactions of the China Welding Institution
Abbreviated source title: Hanjie Xuebao
Volume: 33
Issue: 11
Issue date: November 2012
Publication year: 2012
Pages: 105-109
Language: Chinese
ISSN: 0253360X
CODEN: HHPAD2
Document type: Journal article (JA)
Publisher: Harbin Research Institute of Welding, No. 111 He-Xing Lu, Harbin, China
Abstract: Repairing of casting defect for iron casting has great economic significance. The
relationship between welding parameters and joint microstructure along with hardness is
investigated by micro-alloyed gray cast iron homogenous electrodes and DC welding machine.
The results show that the welding parameters have significant effects on joint microstructure and
hardness. Keeping the welding current constant, the higher the preheating temperature is, the
more uniform the temperature distribution is and slower the cooling rate of joint is, the much
easier gray cast iron microstructure forms. Keeping the preheat temperature constant, with the
increase of welding current, welding heat input increases and the cooling rate of joint decreases,
which is easy to form gray cast iron microstructure with non-chilled phase. The welding
parameters should be controlled in the upper right zone of welding current-preheat
temperature-microstructure type diagram. By strictly controlling of welding current and preheat
temperature, and using small current to make a rendering combined with high-current
continuous welding process, the microstructure and hardness of joint can be effectively
controlled, obtaining the homogenous weld with excellent machinability.
Number of references: 7
Main heading: Cast iron
Controlled terms: Cooling - Defects - Electric welding - Hardness - Machinability
- Microstructure - Preheating - Repair - Welding electrodes
Uncontrolled terms: Casting defect - Cooling rates - Joint microstructures - Manual
arc welding - Preheat temperature - Preheating temperature - Welding current -
Welding parameters
Classification code: 951 Materials Science - 933 Solid State Physics - 913.5 Maintenance
- 641.2 Heat Transfer - 604.2 Machining Operations - 545.2 Iron Alloys - 538 Welding
and Bonding - 423 Non Mechanical Properties and Tests of Building Materials - 421
Strength of Building Materials; Mechanical Properties
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
7.
Accession number: 20132416423756
Title: Microstructure and corrosion resistance of modified AZ31 magnesium alloy using