共查询到17条相似文献，搜索用时 593 毫秒
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奥氏体不锈钢是石油化工生产中应用最为广泛的金属材料之一,本文简要地阐述了不锈钢焊接过程中容易出现的一些问题,针对这些问题提出了相应的预防措施,并根据这些措施提出了焊条的选用原则。 相似文献
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奥氏体不锈钢构件的腐蚀机理与焊接方法 总被引：1，自引：0，他引：1
基于奥氏体不锈钢材料越来越多的应用于不同的工业企业生产当中,为减少和避免加工过程中对材料原有优良性质改变,通过长期对其在船舶工业中的应用特点和工艺方法的实践研究,针对奥氏体不锈钢构件的抗腐蚀特性进行理论分析,揭示其工作在腐蚀环境中的抗腐蚀机理,并以焊接加工为例,指出不恰当的生产方法对奥氏体不锈钢的抗蚀特性的影响,提出了合理的工艺手段和改进措施。 相似文献
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管青梅 《中国基础教育研究》2008,4(2):55-56
论述了等离子焊接原理和焊接工艺的优点;分析了等离子焊接系统中重要组成部分的性能;介绍了等离子焊接系统在不锈钢焊管生产中的一些焊接工艺参数以及实际应用的效果。 相似文献
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刘其中 《湖南广播电视大学学报》2011,(2):70-72
本文介绍了一种用于输送橡胶产品的物料风机叶轮改造的不锈钢焊接工艺措施.针对其在高速旋转中易产生撕裂损伤等现象,从叶片材质、强度及焊接制作工艺等方面进行了探讨,制定了相应的叶轮改造焊接工艺方案,经检测叶轮各项指标符合要求,使用寿命优于进口叶轮. 相似文献
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特种化学品船建造质量中有许多难点和瓶颈,其中奥氏体不锈钢焊接及质量控制是特种化学品船建造及提高产品质量的关键问题,文章分析了特种化学品船不锈钢管焊接中出现的问题,阐述了研究内容、施工关键技术、技术突破点,提出了解决这些问题的工艺措施和关键技术。 相似文献
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环管反应器是石油化工聚丙烯、聚乙烯（简称双烯）生产装置中的核心设备,在其制造过程中,需要有大量的焊接工艺,特别是其面上衬套和支撑圆环板的焊缝较多,其焊接质量直接影响反应器的质量。环形角焊缝自动焊接技术的应用,改变了手工焊接存在的生产效率低、外观成形质量差、焊接变形大等致命缺陷,既降低了劳动强度,提高了生产效率,又提高了角焊缝外观及成形质量,使产品的质量得到了极大提高。 相似文献
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18—8型奥氏体不锈钢焊接工艺研究 总被引：1，自引：0，他引：1
从焊前准备、焊接材料选用、防变形措施、焊接规范、操作标准、前期预热及焊后热处理等方面探讨18—8型奥氏体不锈钢的焊接工艺,具有一定的推广价值。 相似文献
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通过对高强特厚板材料热影响区的脆化、冷裂纹和层状撕裂等焊接性能的分析,得出Q345GJC钢材焊接性能较差的结论.对高强特厚板焊接工艺质量控制要点进行了深入的研究,并应用于某超高层钢结构制作监造中,焊缝合格率达到100%,有效的保证了工程的质量. 相似文献
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The characteristics of microstructure, mechanical property and corrosion behavior of Cr26Mo3.5 super stainless steel joints by pulse tungsten inert gas(P-TIG)welding and laser welding were investigated. The results indicate that the widths of the center equiaxed grain zone(EGZ)and the columnar grain zone(CGZ)increase with the increase of heat input in both welding processes. The precipitates of Nb and Ti carbides and nitrides are formed in the weld metal(WM)and the heat affected zone(HAZ). The joints by laser welding show better tensile and corrosion resistance properties than those by P-TIG welding due to the heat concentration and lower heat input. The tensile strength and elongation increase with the decrease of heat input, and the fracture mode of the joints turns into ductile-brittle mixed fracture from ductile fracture when the welding method turns into P-TIG welding from laser welding. Moreover, the corrosion resistance of all joints declines slightly with the increase of heat input. Hence, laser welding is more suitable for welding Cr26Mo3.5 super stainless steel in engineering applications. 相似文献
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朱甫星 《淮南职业技术学院学报》2009,9(1):17-19,44
不锈钢光纤束管的焊接质量影响光缆的使用性能,利用涡流擦伤法检测不锈钢光纤束管焊接质量,可以有效的检测、监控不锈钢光纤束管;介绍了涡流法在线检测不锈钢光纤束管时几个重要参数的确定以及确定这些参数所采用的一般方法。 相似文献
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针对内、外焊缝余高过大导致焊缝处应力集中,抵抗动载荷能力下降等影响焊管力学性能的问题,在充分分析焊缝滚压冷轧处理工作流程的基础上,以西门子S7—200PLC为系统核心,EasyView触摸屏为人机界面,提出能够自行调节滚压行程、滚压速度、回程速度、加减速和比例阀控制死区等设置的一整套电气控制方案,完成对小口径不锈钢焊管的内、外焊缝的滚压冷轧处理,解决了以往设备需要依赖进口或调试困难、故障率高、维修难的问题,提高了产品成材率和品质,满足了生产大型电站、锅炉换热器用小口径不锈钢焊接管的生产工艺要求。 相似文献
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To analyze the effects of width and thickness of each composition element of mixed steel U-rib-stiffened plates on the welding residual stress distribution, the distribution of the U-rib and the plate residual stress was calculated using a simplified calculation method. The method involved welding the mixed steel U-rib-stiffened plates for a structure with different sizes and different strength ratios of U-rib to plate. Based on a welding residual stress numerical simulation method validated by the blind hole method test, the distribution law of the mixed steel U-rib stiffened plate was studied. The results showed that the change of plate width has little impact on the welding residual stress and that the ratio of the thicknesses of the plate to U-rib stiffeners, the thickness of the plate, and the thickness of the U-rib has a great influence on the distribution of the welding residual stress. The thickness of plate and steel strength also greatly influenced the distribution width of the residual tensile stress. While analyzing the compression capacity of U-rib-stiffened plates, the simplified distribution of welding residual stress was used. 相似文献
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By using semisolid joining technique,the bonding of stainless steel and semisolid aluminum alloy is successfully realized.The relationships between interracial shear strength and solid fraction of aluminum alloy,bonding pressure and time of keeping pressure were studied by the method of orthogonal experiment.The interfacial structure and the fracture structure of the bonding plate are studied by means of optical microscope (OM) and scanning electron microscope (SEM).The results show that there is the best solid fraction between the solid phase line and the liquid phase line of the semisolid aluminum alloy,with the increase of bonding pressure and pressure time,the interfacial shear strength increases rapidly,and then with further increase of bonding pressure and pressure time,the shear strength rises little.Along the interface,solid phase and liquid phase bond with stainless steel by turns because of the different diffusion ability.So,a new type of non-equilibrium diffusion interfacial structure is constructed at the interface of stainless steel and aluminum alloy,compound mechanism of plastic and brittle fracture interface was formed at the shear fracture interface. 相似文献
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王红涛 《佳木斯教育学院学报》2012,(9):211-212
本文分别通过探讨真空环境下热处理温度和热处理时间对316L不锈钢镀银板性能的影响,从而确定316L不锈钢镀银板的最佳真空热处理工艺。 相似文献