箱型梁（柱）隔板非熔嘴式电渣焊工艺分析

箱形结构梁（柱）大量地应用于建筑钢结构中,尤其是高层或高层建筑结构中,但其内部的隔板焊接多数采用熔嘴式电渣焊接方法。本文详细介绍了一种非熔嘴式电渣焊接技术的具体应用和应注意的问题,经过实践和总结,此方法对其他类似结构内部隔板的焊接,能够保证质量、提高生产效率,具有一定的借鉴作用。     

应用于箱形柱制造的熔嘴式电渣焊技术

由于国外客户大宗大型电站钢结构中的箱形主体立柱结构相对于其他形式的型钢与焊接型钢比较特殊,为了顺利全部制造完成,立柱的多层隔板、隔板用垫板与侧板三类板组成的立式筒状坡口焊缝必须采用日本开发研制的熔嘴式电渣焊焊接。本文通过对结构形式的深入探讨,改进了组装工艺与四角焊口部分的坡口形式。针对不同焊接件的厚度与组装四角焊口的大小,合理匹配焊接工艺参数,并结合实际操作过程中的操作技巧、施焊重点及难点进行深入分析,对常见焊接缺陷制定防止工艺措施,取得了满意的效果。     

箱形柱熔嘴电渣焊(SES)焊接技术

箱型截面由于其优越的截面性能,越来越多地被采用。小截面(长度与宽度≤900mm)箱型构件的加工过程中,电渣焊是必不可少的,并且是整个加工流程的瓶颈环节。本文主要介绍了熔嘴电渣焊的焊接流程与焊接参数,对于电渣焊的操作具有参考与借鉴价值。     

箱型钢梁(柱)隔板管极电渣焊纵缝焊接的工艺性能改善

介绍了在箱型钢梁(柱)隔板纵缝焊接中，管极电渣焊管极涂层的自制研究、工艺应用及其进一步生产转化。     

熔嘴电渣焊在高压容器制造中的应用

用熔嘴电渣焊的工艺方法，以焊代锻成功地焊接了高压容器，成本低，效率高，省工省料，是焊接大厚度不规则断面焊接结构的一种有效的工艺。     

WT-1200型非熔嘴丝极电渣焊水冷式焊枪技术改进

本文针对WT-1200型非熔嘴丝极电渣焊枪,在实际生产中出现的问题及结构缺陷,进行合理的技术改进。WT-1200型非熔嘴式丝极电渣焊枪改进后①降低了操作难度;②故障率大幅度降低,延长焊枪使用寿命;③提高了生产效率,降低了焊接成本。     

埋弧摆动熔嘴电渣焊新工艺在生产实际中的应用

通过所承接的业务中涉及到的焊接工艺方法要求,介绍了电渣焊的原理及此项目的技术改造,具体地制定了焊接工艺,并指出了焊接过程中出现的问题及解决方法.     

“新天堂”转换桁架箱形结构件非熔嘴电渣焊（NCESW）技术

Q420D-Z15低合金高强度结构钢长构件厚壁板箱形内隔板非熔嘴电渣焊接时,易产生壁板未熔合现象。本文经过焊接熔透性试验,调整焊接工艺参数,优化坡口尺寸,采取预热、提高热输入量,保证了电渣焊质量和焊接效率的提高。     

焊接材料计算专家系统的建立

焊接材料计算专家系统的成功应用,结束了焊接材料计算需查指导性资料《焊条焊剂的型号性能及其定额》,或靠计算焊缝体积求焊接材料的历史。本系统涉及的焊接方法包括焊条电弧焊、CO2气体保护焊、埋弧自动焊、窄间隙埋弧焊。新增了窄间隙埋弧焊和筒体类埋弧焊坡口形式。系统计算覆盖的钢板厚度可达350mm。可在单机版CAPP和网络版CAPP上以独立菜单的形式使用,也可以在任何计算机上以FOXPRO界面独立运行,可应用于不同行业。     

A power source for arc welding with a stationary consumable electrode

A new method for evaluating the quality parameters, in particular impact fracture toughness, is described. The method is based on the effect of a high-speed water jet on the surface of the inspected object, with the information features being the geometrical characteristics of the resultant hydraulic cavity. Experimental results demonstrating the possibilities of evaluation of the homogeneity of the material of the welded joint are presented. The relationship between the impact toughness of the material of the welded joint and the depth of the hydraulic cavity formed as a result of the effect of the water jet is discussed.     

膜盒热流道注射模设计

针对聚甲醛材料的膜盒塑件收缩变形大、成型稳定差的特点,详细分析了塑件成形工艺,介绍了模具结构、热流道系统结构、滑块结构及冷却系统的设计,模具设计合理,取得了较好的经济效益,对盒型类塑件的注射模设计有一定的参考价值。     

A method for calculating the parameters of gas-shielded twin-arc multipass consumable electrode welding

The method for solving the problem of determination of the values of the parameters resulting in stable arcing in a narrow gap by the methods of computer engineering analysis is discussed and theoretical relationships, connecting the welding parameters with the dimensions of the welded joint, are presented. The technological parameters of the process are determined by solving the inverse problem of modelling the formation of the weld pool under the effect of two welding arcs in a narrow gap during successive passes. The calculations of the parameters are confirmed by the experimental results of narrow-gap multipass welding.     

钢箱梁焊接工艺浅述

主要介绍了钢箱梁制作的焊接工艺、工装设备、焊接变形控制、质量检验方法及施工要求等。经过实际应用，证明其焊接工艺优良，施工质量安全可靠，值得推广。     

Control of droplet transfer in consumable electrode welding with short circuiting of the arcing gap

We present the results of an experimental programme of fatigue tests carried out on two types of butt joints with thicknesses of 20 and 40 mm respectively, characterized by a significant gap between weld edges, not compliant with the requirements of construction specifications. The tests were conducted on specimens taken from the weld beads of joints typical of those produced at the site (butt joints between web and flanges) and made with the same procedures (welding process, welding position, welding filler, etc.). The test results were elaborated statistically to determine the fatigue resistance category in accordance with the requirements of standard EN 1993-1-9 and IIW recommendations. Calculations took into account both the thickness of the specimens (tests were carried out on both to-scale and true-thickness specimens for the purposes of validation) and also flexural stress components induced by the non-planarity of the specimens.     

建筑钢结构小坡口特殊喷嘴焊接工艺

通过对窄间隙焊接技术的分析、理解,进行其派生技术的研究;并通过计算机仿真,研制特殊的焊接喷嘴,进行了板厚为90mm钢板开25°+8°坡口横焊时接工艺性试验,获得了外观成形良好的焊缝.焊接接头宏观金相表明焊接接头中未见气孔、裂纹、夹渣、来熔合等缺陷:抗拉强度与母材的相当,冲击韧性和焊缝组织良好,通过分析知底部焊缝热裂纹倾向较小.此项研究为建筑钢结构大厚度钢板开小坡口对接焊在建筑钢结构中的应用奠定了强力的技术支撑.     

Corrosion resistance of welds in type 304L stainless steel made with a nickel-copper-ruthenium welding consumable

Ni-Cu-Pd welding consumables have been recently developed for 300-series austenitic stainless steels such as Type 304L (SS304L) to reduce the amount of Cr(VI) in the welding fumes. In this study, a modified filler metal that replaces Pd with Ru was evaluated. Initial tests conducted on button-melted samples and bead-on-plate welds indicated that Ni-Cu-Ru exhibited good corrosion properties. Actual Ni-Cu-Ru arc welds made on SS304L were successfully produced and the corrosion performance was comparable to or better than that of Ni-Cu-Pd welds. These welds are a suitable replacement for welds made with standard 300-series welding consumables, such as SS308L.