共查询到19条相似文献,搜索用时 296 毫秒
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50mm~80mm奥氏体不锈钢对接焊接接头虽然超出了JB/T 4730.3-2005标准的资料性附录N《奥氏体不锈钢对接焊接接头超声波检测和质量分级》所规定的范围,但经过实验和分析,得出了对于此类焊缝超声检测基本可行的结论。 相似文献
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我厂以前焊接奥氏体不锈钢压力容器采取的方法是手工电弧焊 ,该方法焊缝成形不美观 ,焊缝易夹渣 ,焊接质量难保证 ,且工作效率低。而一些压力容器制造厂家采用埋弧自动焊焊接奥氏体不锈钢压力容器 ,焊缝成形美观 ,焊接质量好 ,且大大提高了工作效率 ,但焊材、焊缝稀释率以及焊接工艺参数是影响焊接质量的主要因素。本文通过焊接工艺试验 ,研究焊缝力学性能和焊接工艺参数 ,为奥氏体不锈钢埋弧自动焊在我厂压力容器制造中的应用提供了依据。1 焊接工艺试验1.1 试验材料采用两块 2 0mm厚的 0Cr19Ni9奥氏体不锈钢试板 ,尺寸为 10 0 0m… 相似文献
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对304/Q345R不锈钢复合板常压储罐进行了超声衍射时差法技术研究应用.采用带有对接焊缝的表面盲区试块进行直通波盲区测定,对复合板焊接模拟试块进行检测,分析比较了基于覆材侧和基材侧的检测效果差异性,最后将制定的检测工艺应用于现场一台25000 m3不锈钢复合板常压储罐,检出埋藏裂纹1条并进行了解剖验证.结果表明:基于... 相似文献
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不锈钢轨道车辆选用SUS301L系列奥氏体不锈钢材质,采用薄板焊接,对复杂的轨道车辆结构的不同结构使用不同特点的焊接工艺技术。介绍不锈钢车辆材料的特点和性能,以及电阻点焊技术、熔化极气体保护焊焊接技术、钨极氩弧焊焊接技术、螺柱焊焊接技术原理。分析不锈钢车辆的焊接工艺特点、焊接工艺规范、焊接设备特点等,研究在高强奥氏体不锈钢材料的车辆生产中的焊接工艺技术。 相似文献
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Fatigue Crack Growth Behavior of Gas Metal Arc Welded AISI 409 Grade Ferritic Stainless Steel Joints
A.K. Lakshminarayanan K. Shanmugam V. Balasubramanian 《Journal of Materials Engineering and Performance》2009,18(7):917-924
The effect of filler metals such as austenitic stainless steel, ferritic stainless steel, and duplex stainless steel on fatigue
crack growth behavior of the gas metal arc welded ferritic stainless steel joints was investigated. Rolled plates of 4 mm
thickness were used as the base material for preparing single ‘V’ butt welded joints. Center cracked tensile specimens were
prepared to evaluate fatigue crack growth behavior. Servo hydraulic controlled fatigue testing machine with a capacity of
100 kN was used to evaluate the fatigue crack growth behavior of the welded joints. From this investigation, it was found
that the joints fabricated by duplex stainless steel filler metal showed superior fatigue crack growth resistance compared
to the joints fabricated by austenitic and ferritic stainless steel filler metals. Higher yield strength and relatively higher
toughness may be the reasons for superior fatigue performance of the joints fabricated by duplex stainless steel filler metal. 相似文献
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为解决中国聚变工程实验堆316L不锈钢焊缝超声波检测时,探头扫查空间受限、检测信噪比低的难题,提出了基于双晶面阵探头的相控阵超声检测方案.通过CIVA仿真,分析了不同聚焦参数下DMA探头的声场特征,确定对接接头的检测工艺.参考NB/T47013.3-2015《承压设备无损检测第3部分:超声检测》附录I,设计并制作了对比试块,验证了检测工艺下的声束覆盖和φ2 mm侧横孔信噪比.结果表明,DMA探头可以在有限的扫查空间内实现焊缝声束全覆盖,对比试块中不同位置的φ2 mm侧横孔信噪比大于15 dB.试验结果可为316L类不锈钢对接焊缝相控阵超声检测工艺制定提供参考. 相似文献
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Govindaraj Magudeeswaran Visvalingam Balasubramanian Gankidi Madhusudhan Reddy 《Metals and Materials International》2008,14(4):523-529
Quenched and tempered (Q&T) steels are prone to hydrogen induced cracking after welding. Austenitic stainless steel (ASS)
welding consumables are traditionally used for welding of high hardness, Q&T steels as they have higher solubility for hydrogen
in the austenitic phase. The use of stainless steel consumables for a non stainless steel base metal is not economical. Hence,
in the present work, an attempt was made to explore alternate consumables for welding Q&T steels. Flux cored arc welding process
was used to fabricate the joints using austenitic stainless steel and low hydrogen ferritic steel consumables. The joints
fabricated using low hydrogen ferritic steel consumables exhibited superior fatigue performances than the joints fabricated
using ASS consumables. 相似文献