Effect of Hardfacing Consumables on Ballistic Performance of Q&T Steel Joints

查看全文 作　　者：[1]M.BALAKRISHNAN;[2]V.BALASUBRAMANIAN;G.MADHUSUDHAN [3]REDDY

机构地区：[1]Department of Mechanical Engineering, M. Kumarasamy College of Engineering (Autonomous);[2]Center for Materials Joining & Research (CEMAJOR),Department of Manufacturing Engineering, Annamalai University;[3]Solidification Technology Division, Metal Joining Group, Defence Metallurgical Research Laboratory (DMRL)

出　　处：《Defence Technology(防务技术)》索引2013年第9卷第4期,共10页

基　　金：the Armament Research Board (ARMREB), Directorate of Armaments, Ministry of Defence, New Delhi, Government of India for providing financial support to carry out this investigation through a R&D project, No. ARMREB/MAA/2008/ 93 摘　　要：This study was carried out to evaluate the effect of hardfacing consumables on ballistic performance of armour grade quenched and tempered(Q&T)steel welded joints.To evaluate the effect of hardfacing consumables,joints were fabricated using 4 mm thick tungsten carbide(WC)/chromium carbide(CrC)hardfaced middle layer;above and below which austenitic stainless steel(SS)layers were deposited on both sides of the hardfaced interlayer.Shielded metal arc welding(SMAW)process were used to deposite all(hardfaced layer and SS layers)layers.The fabricated joints were evaluated for its ballistic performance,and the results were compared with respect to depth of penetration(DOP)on weld metal and heat-affected zone(HAZ)locations.From the ballistic test results,it was observed that both the joints successfully stopped the bullet penetration at weld center line.Of the two joints,the joint made with CrC hardfaced interlayer(CAHA)offered better ballistic resistance at weld metal.This is because its hardness is higher due to the presence of primary carbides of needle shape,polyhedral shape and eutectic matrix containing a mixture of gt M7C3carbides in the CrC hardfaced interlayer.The scattering hardness level in the WC interlayer,the matrix decomposition resulted lower hardness and the co-existence of d ferrite in the interface between hardfacing and SS root/SS cap could be attributed to the inferior ballistic resistance of the joint made with WC hardfaced interlayer(WAHA joint). 关键词：弹道性能耐磨堆焊 M7C3型碳化物耗材焊接金属焊缝金属初生碳化物淬火效果

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Effect of Hardfacing Consumables on Ballistic Performance of Q&T Steel Joints

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