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2篇 您的检索式:作者名="P.K.GHOSH"
    题名 作者 年代 出处 被引量
1热处理对由气体热喷涂工艺生产的混加碳化钨镍基耐磨涂层特性的影响显示文摘通过在氧乙炔焰下热喷镍基碳化钨粉,对软钢基体进行了表面硬化。研究了喷涂前后加热对涂层的表面形态、硬度和耐磨特性的影响。发现,将预热温度提高到400℃,喷后加热温度提高到900℃,可以提高涂层的硬度和耐磨性。不过,我们发现,涂层断面的喷涂特性不同,涂层表面及其与软钢界面之间的某些区域的硬度和耐磨性最高。分析发现,喷涂期间以及喷后热处理期间可能发生的各种相变是涂层断面特性分布不均的—个重要原因。P.K.GHOSH 贾辉章 1992国外金属热处理1992,13,4:1
2Variation of chemical composition of high strength low alloy steels with different groove sizes in multi-pass conventional and pulsed current gas metal arc weld depositions显示文摘25 mm thick micro-alloyed HSLA steel plate is welded by multi-pass GMAW and P-GMAW processes using conventional V-groove and suitably designed narrow gap with 20 mm(NG-20) and 13 mm(NG-13) groove openings.The variation of weld metal chemistry in the multi pass GMA and P-GMA weld depositions are studied by spark emission spectroscopy.It is observed that the narrow groove GMA weld joint shows significant variation of weld metal chemistry compared to the conventional V-groove GMA weld joint since the dilution of base metal extends from the deposit adjacent to groove wall to weld center through dissolution by fusion and solid state diffusion.Further,it is noticed that a high rate of metal deposition along with high velocity of droplet transfer in P-GMAW process enhances the dilution of weld deposit and accordingly varies the chemical composition in multi-pass P-GMA weld deposit.Lower angle of attack to the groove wall surface along with low heat input in NG-13 weld groove minimizes the effect of dissolution by fusion and solid state diffusion from the deposit adjacent to groove wall to weld center.This results in more uniform properties of NG-13 P-GMA weld in comparison to those of NG-20 and CG welds.K.DEVAKUMARAN M.R.ANANTHAPADMANABAN P.K.GHOSH 2015Defence Technology(防务技术)2015,11,2:1
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