ZGMn13钢MIG焊工艺

本文采用高效的ＭＩＧ焊工艺方法,选择抗裂性能较好的单相奥氏何不锈钢焊丝和耐磨ＥＴ－２００Ｋ焊条对ＺＧＭｎ１３进行焊接工艺试验,制定了ＺＧＭｎ１３钢ＭＩＧ焊的可靠性工艺,分析了焊接接头组织及性能。结果表明：确定的焊接工艺有保证焊接质量且焊接接头具有与母材要当的耐磨性。     

浅谈16Mn压力容器的埋弧焊工艺

16Mn是低合金钢中使用广泛、生产量很大的钢材,具有良好的综合机械性能和工艺性能,文章简要介绍了16Mn钢的化学组织与性能,并对其焊接性能进行了分析,以厚壁压力容器焊接为例,对16Mn压力容器的埋弧焊工艺从多个方面进行了阐述。     

厚钢板拼焊工艺

CO2气体保护焊+埋弧自动焊焊接大厚度钢板拼接焊缝, 既提高了劳动生产率,减轻劳动强度,又有效地保证了焊缝质量.     

起跳器氩弧焊工艺研究

钠灯在路面照明、植物补光等领域有着广泛的应用。为使钠灯结构紧凑, 更换方便, 一体式钠灯应用而生。 其中内置式起跳器是一体式钠灯的关键零部件, 因此起跳器的加工质量显得尤为重要。而传统的起跳器焊接采用手 工电阻焊的方式, 质量不稳定, 劳动强度大, 效率低, 急需改进。实验设计装夹模具和工位分度转盘快速固定零件, 提 高加工效率; 运用正交实验摸索全自动氩弧焊最优工艺参数。最终实验结果: 氩弧焊焊接后结点成球状, 焊接牢度、 外观质量明显优于传统手工电阻焊, 改进后生产效率也得到极大提高。     

GCr15钢与A3钢电阻焊强度的研究

本文对ＧＣｒ１５与Ａ３钢板电阻焊做了大量实验，最后确定出用于产品实际焊接的最佳工艺。     

含微量钛的15MnV钢的控轧工艺对组织性能的影响

本文研究了钢样加热温度,形变温度,形变量以及轧后加快冷却等工艺参数对微量钛处理的15MnV钢的组织和机械性能的影响,讨论了控轧后空冷条件下这种钢中微量钛对机械性能的作用及其强韧化机制。     

制冷压缩机专用MAG环焊和塞焊工艺

技术开发单位西北工业大学技术简介制冷压缩机生产线中压缩机壳体封装MAG（熔化极活性气体保护焊）环缝焊和机芯支架定位塞焊的工艺系统主要包括环焊和塞焊设备。     

表面贴装元器件的手工焊接及解焊技巧

随着社会的不断发展,科技的不断进步,我国各个领域均得到了很好的发展,人们的生活质量也得到了更大的提升.近年来电子组装行业在社会中不断崭露头角,尤其是表面贴装技术的发展更是备受关注,然而由于种种因素影响,导致在焊接方面往往难以获得优质效果.本文通过查阅相关资料,简要介绍了手工焊接表面贴装元件的要求,以及表面贴装元器件解焊技巧,以期能够为促进表面贴装技术的优化提供有价值的参考.     

Effects of welding wire composition and welding process on the weld metal toughness of submerged arc welded pipeline steel

The effects of alloying elements in welding wires and submerged arc welding process on the microstructures and low-temperature impact toughness of weld metals have been investigated.The results indicate that the optimal contents of alloying elements in welding wires can improve the low-temperature impact toughness of weld metals because the proentectoid ferrite and bainite formations can be suppressed,and the fraction of acicular ferrite increases.However,the contents of alloying elements need to vary along with the welding heat input.With the increase in welding heat input,the contents of alloying elements in welding wires need to be increased accordingly.The microstructures mainly consisting of acicular ferrite can be obtained in weld metals after four-wire submerged arc welding using the wires with a low carbon content and appropriate contents of Mn,Mo,Ti-B,Cu,Ni,and RE,resulting in the high low-temperature impact toughness of weld metals.     

Arc characteristics of submerged arc welding with stainless steel wire

The arc characteristics of submerged arc welding （SAW） with stainless steel wire were studied by using Analysator Hannover （AH）. The tests were carded out under the same preset arc voltage combined with different welding currents. By comparing the probability density distribution （PDD） curves of arc voltage and welding current, the changes were analyzed, the metal transfer mode in SAW was deduced, and the characteristics of a stable arc were summarized. The analysis results show that, with an increase of welding parameters, the short-circuiting peak in the PDD curves of arc voltage decreases gradually until it disappears, and the dominant metal transfer mode changes from flux-wall guided transfer to projected transfer and then to streaming transfer. Moreover, when the PDD curves of arc voltage are both unimodal and generally symmetrical, the greater the peak probability and the smaller the peak span, the more stable the arc becomes.     

双电极焊条两芯间距和焊接电流对单弧焊工艺的影响

研究了钛钙型双电极焊条的两芯间距和焊接电流对单弧焊工艺的影响 .研究结果表明 ,钛钙型双电极焊条的两芯间距是控制焊接电压的最重要因素 ,焊接时调节双电极焊条与工件间距离对电弧电压影响很小 ,随双电极焊条两芯间距的增大 ,电弧电压升高 ;在两芯间距一定的条件下 ,随焊接电流增大 ,电弧电压线性升高 ;对于药皮重量系数为 45.6%的 2×Φ4mm钛钙型双电极焊条 ,在两芯间距为 1.2～ 1.7mm ,焊接电流为 180～ 2 2 0A的工艺条件下进行焊接 ,焊缝成形较好 ,力学性能满足国家标准的要求     

等离子弧焊应用于热电池壳身焊接工艺研究

本介绍了等离子弧焊接在热电池壳身焊接应用情况，通过实验得出了使用脉冲电流焊接的合理工艺参数。从而得出了脉冲等离子弧焊用于热电池壳身的焊接是可行的结论。     

高强埋弧焊接圆钢管多层多道焊接数值模拟

为研究高强埋弧焊接圆钢管纵向残余应力分布规律及影响因素,考虑了高强钢材非线性物理材料属性和焊接过程中的相变潜热,以均匀热源模型模拟第一道次熔化极气体保护焊(GMAW)热源,以双椭球热源模型模拟第二、三道次埋弧焊(SAW)热源,通过单元生死功能模拟焊缝生长过程,并在焊接荷载步间不断修正钢管与空气热传递的表面积,对3道次焊...     

管道焊接中手工钨极氩弧焊(TIG)单面焊双面成形技术

压力管道手工电弧焊接中焊道背面易出现缺陷,且管道中的焊渣无法及时清理干净,用手工TIG焊的方法成功的解决了这一问题。     

软开关技术在弧焊逆变器中的应用

介绍了常见的软开关逆变器的主要形式和基本原理及移相控制的ZVS，ZVZCS和ZCS三种PWM全桥变换器及其在弧焊逆变器中的作用，对软开关逆变器主电路进行了技术分析和讨论，并指出了软开关弧焊逆变器的发展方向。     

Influence of welding parameters on nitrogen content in welding metal of 32Mn-7Cr-1Mo-0.3N austenitic steel

The transfer behavior of nitrogen into the welding metal during gas tungsten arc welding process of 32Mn-TCr-1Mo-0.3N steel was investigated. The effects of gas tungsten arc welding process variables, such as the volume fraction of nitrogen in shielding gas, arc holding time and arc current on the nitrogen content in the welding metal were also evaluated. The results show that the volume fraction of nitrogen in gas mixture plays a major role in controlling the nitrogen content in the welding metal. It seems that there exhibits a maximum nitrogen content depending on the arc current and arc holding time. The optimum volume fraction of nitrogen in shielding gas is 4% or so. The role of gas tungsten arc welding processing parameters in controlling the transfer of nitrogen is further confirmed by the experimental results of gas tungsten arc welding orocess with feeding metal.     

钢结构焊接残余应力及焊接变形控制技术

为了探究控制钢结构焊接过程变形策略,通过钢板对接方法研究了焊接残余应力及焊接变形.以两块同料、同尺寸钢板对接解析焊接工艺过程,设定常态焊接工艺参数,在焊接钢板上进行焊接横向及纵向残余应力计算,并在焊接过程构建温度场,建立有限元模型,绘制其温度曲线图,探究残余应力变化趋势及分布情况.结果表明,对接焊接钢结构焊缝附近部分残余应力较大,结构残余应力在初始加热时期会呈现较快下降趋势,后逐渐趋于平缓,钢板对接焊接变形主要原因是纵向残余应力过大,可通过平行加热处理降低纵向残余应力的影响.