NDLI: Groove configurations of a flux-cored arc welding process used in critical structures of precision mechanical presses

Content Provider	Springer Nature Link
Author	Ling, Kuo Hsia Fuh, Yiin Kuen Wu, Kun Ling Kuo, Tin Chun Huang, Chung Yu
Copyright Year	2015
Abstract	This paper utilized a flux-cored arc welding (FCAW) technique and investigated various groove configurations as well as multi-pass welding sequences to create welding specifications in the precision mechanical press industry. Experimental investigations were conducted to examine the influence of three different groove configurations of 40-mm-thick JIS SS400 structural steel welded joints on mechanical and metallurgical properties. Mechanical properties of the welded joints were evaluated by uniaxial tensile testing and Charpy V-notch (CVN) impact testing at room temperature. Simultaneously after a multi-pass welding sequence, various degrees of thermal treatments such as tempering or normalization inevitably occur in the heat-affected zone (HAZ). The unfavorable microstructures in the HAZ and reheated zones can be intentionally modified via the above procedure such that the toughness and microhardness of the HAZ improve. The experimental results revealed that of the three types of groove configurations (C1, C, and F), groove type C1 possessed the maximum yield strength (YS) and ultimate tensile strength (UTS) while groove type F possessed the highest CVN values tested at room temperature. The fundamental reason may be attributed to heat dissipation characteristics of each groove configuration and associated exertion of the multi-pass welding sequence. Microstructural and morphological features as revealed through an optical microscope also indicate a significant influential factor of these joints among the different groove configurations. Therefore, grain refinement of varying degrees can be obtained due to the variation of thermal characteristics of heat input/dissipation; thus, various mechanical and CVN impact properties can be obtained.
Starting Page	1905
Ending Page	1916
Page Count	12
File Format	PDF
ISSN	02683768
Journal	The International Journal of Advanced Manufacturing Technology
Volume Number	78
Issue Number	9-12
e-ISSN	14333015
Language	English
Publisher	Springer London
Publisher Date	2015-01-20
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Groove configurations Flux-cored arc welding Precision mechanical press Metallurgy Multi-pass welding Industrial and Production Engineering Production/Logistics/Supply Chain Mechanical Engineering Computer-Aided Engineering (CAD, CAE) and Design
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Mechanical Engineering Computer Science Applications Software

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