共查询到20条相似文献,搜索用时 78 毫秒
1.
铝镁合金的焊接性较差,在焊接过程中容易出现气孔、夹渣等各种焊接缺陷。针对铝镁合金贮气筒的焊接,深入分析了铝镁合金的焊接性,制定了合理的焊接工艺。详细介绍了焊接所采用的焊接方法、焊接电源、焊接工艺参数、焊前焊后处理及操作要点,采用铝镁合金替代碳钢来生产贮气筒,对于实现汽车轻量化具有重大意义。 相似文献
2.
分析了用熔化极脉冲氩弧焊焊接铝镁合金料仓的双面焊的工艺特点,并在实践中提出了提高焊接铝镁合金的工艺适应性措施及操作技巧。 相似文献
3.
铝镁合金料仓主体脉冲MIG自动焊工艺研究 总被引:2,自引:0,他引:2
针对铝镁合金焊接技术和焊接工艺的难点,研究确定了铝镁合金仓主体脉冲MIG自动焊工艺及其实施方法,该工艺方法克服了传统施焊方法的某些不足,能保证产品的焊接质量,降低劳动强度,提高有色金属结构件的焊接技术水平和焊接质量。 相似文献
4.
运用TIG/MIG焊成功焊接了国外进口材料的铝镁合金污水处理设备,并对铝镁合金的焊接方法、坡口加工、焊接工艺参数等问题进行了讨论。 相似文献
5.
李福恒 《机械工人(热加工)》2003,(1):25-26
在铝镁合金焊接中,由于采用MIG焊接比TIG具有生产效率高,焊接质量稳定等特点。为了满足料仓焊接施工的技术要求,根据这一特点,我们进行了331焊丝、LINCOLN DC—400焊接电源及LN—9(增装气路保护)送丝机构等焊接设备的焊接工艺试验。在试验过程中发现送丝不稳定, 相似文献
6.
王鹏雁 《机械工人(热加工)》2011,(12):32-34
在对铝镁合金进行焊接性分析的基础上,通过脉冲半自动MIG焊试验,利用脉冲电源的高频脉冲击碎铝合金表面的氧化膜,利用瞬时峰值脉冲电流实现较低焊接电流下的熔滴喷射过渡形式,从而实现高效率、高质量的铝镁合金管道的半自动焊接。 相似文献
7.
本文介绍了铝镁合金小口径管道丁IG焊接时,采用焊缝组对无间隙,管内无氩气保护工艺,保证单面焊双面成形。并分析了气孔产生原因和防止产生气孔的工艺措施。经实践检验取得了满意的焊缝质量,有一定的应用价值和借鉴意义。 相似文献
8.
9.
为获得神州系列某型号5A06铝镁合金过滤器产品电子束焊端面优良焊缝,需要通过大量试验以获得最佳焊接参数。故利用Minitab中的田口方法来减少试验次数,降低研发成本,并评定焊接因子及其交互作用对焊缝的影响,最终得出各焊接因子对焊缝质量影响的主次,为焊接工艺优化及熔池研究提供焊接工艺参数。优化结果:聚焦电流274 m A,焊接束流14.5 m A,焊接速度5 rpm,高压60 k V,工作距离52 mm,向材料内部聚焦0.1 mm为最佳参数组合,且3个焊接因子中聚焦中心对焊缝成形影响最大。通过试验对优化后的焊接工艺参数进行验证,满足产品质量要求。结果表明,该方法可为铝合金电子束端面焊接合理选择焊接工艺参数和保证焊接质量提供参考依据。 相似文献
10.
11.
12.
Mg/Al合金爆炸焊连接及其界面接合机制 总被引:4,自引:0,他引:4
采用爆炸焊接技术制备以AZ31B镁合金为基板,以6061铝合金为覆板的AZ31B/6061合金的层状复合板。对复合板界面的宏观形貌、微观组织、界面元素扩散行为及界面接合性能进行测试、分析。结果表明:AZ31B/6061合金爆炸复合板接合界面呈波状接合;靠近接合界面处的塑性变形程度最大,以孪晶和再结晶形式为主;在AZ31B一侧靠近界面处出现与界面呈45°的绝热剪切带组织,带内为动态再结晶形成的细晶粒组织;接合界面两侧的显微硬度分布为:随着距离接合界面的增大,AZ31B和6061侧的显微硬度值递减趋势;复合板的拉-剪试验结果表明,界面接合强度达193.3 MPa;复合板界面接合机制为压力焊、扩散焊及局部熔化焊综合作用的结果。 相似文献
13.
低功率脉冲激光-电弧复合热源高效焊接过程中的“匙孔”行为研究 总被引:1,自引:0,他引:1
激光-电弧复合热源焊接技术由于具有焊接熔深大、效率高、质量好等优点而受到广泛关注。采用低功率脉冲激光-钨极惰性气体保护(Tungsten inert gas,TIG)焊电弧复合热源技术进行镁合金板材的焊接,研究激光脉冲作用消失之后的等离子体行为和激光"匙孔"行为。在上述试验结果的指导下优化工艺参数,对比研究采用单独激光焊、TIG电弧焊和复合热源焊这三种方法实现镁合金板材对接焊相同效果时焊接效率的差异。研究结果表明,激光"匙孔"和"匙孔"等离子体的形成是实现复合热源高效焊接的前提条件,恰当的工艺参数可以使得激光"匙孔"维持稳定的开口状态,这种状态提高了电弧的稳定性和能量密度,延长了镁等离子体的恢复时间,因此能够提高复合热源的焊接效率。达到相同焊接效果时复合热源的焊接效率分别达到单独激光焊接效率的7.14倍和单独TIG电弧焊接效率的4.29倍。 相似文献
14.
15.
V. Balasubramanian V. Ravisankar G. Madhusudhan Reddy 《The International Journal of Advanced Manufacturing Technology》2008,36(3-4):254-262
High strength aluminum alloys (Al-Zn-Mg-Cu alloys) have gathered wide acceptance in the fabrication of lightweight structures
requiring high strength-to-weight ratio, such as transportable bridge girders, military vehicles, road tankers and railway
transport systems. The preferred welding processes of high strength aluminum alloy are frequently the gas tungsten arc welding
(GTAW) process and the gas metal arc welding (GMAW) process due to their comparatively easy applicability and better economy.
Weld fusion zones typically exhibit coarse columnar grains because of the prevailing thermal conditions during weld metal
solidification. This often results in inferior weld mechanical properties and poor resistance to hot cracking. In this investigation,
an attempt has been made to refine the fusion zone grains by applying a pulsed current welding technique. Rolled plates of
6 mm thickness were used as the base material for preparing single pass welded joints. A single ‘V’ butt joint configuration
was prepared for joining the plates. The filler metal used for joining the plates was AA 5356 (Al-5Mg (wt%)) grade aluminum
alloy. Four different welding techniques were used to fabricate the joints: (1) continuous current GTAW (CCGTAW), (2) pulsed
current GTAW (PCGTAW), (3) continuous current GMAW (CCGMAW) and (4) pulsed current GMAW (PCGMAW). Argon (99.99% pure) was
used as the shielding gas. Tensile properties of the welded joints were evaluated by conducting tensile tests using a 100 kN
electro-mechanical controlled universal testing machine. Current pulsing leads to relatively finer and more equi-axed grain
structure in GTA and GMA welds. In contrast, conventional continuous current welding resulted in predominantly columnar grain
structures. Grain refinement is accompanied by an increase in tensile strength and tensile ductility. 相似文献
16.
17.
18.
Interfacial structure greatly affects the mechanical properties of laminated plates.However,the critical material properties that impact the interfacial morphology,appearance,and associated bonding mechanism of explosive welded plates are still unknown.In this paper,the same base plate(AZ31B alloy)and different flyer metals(aluminum alloy,copper,and stainless steel)were used to investigate interfacial morphology and structure.SEM and TEM results showed that typical sine wave,wave-like,and half-wave-like interfaces were found at the bonding interfaces of Al/Mg,Cu/Mg and SS/Mg clad plates,respectively.The different interfacial morphologies were mainly due to the differences in hardness and yield strength between the flyer and base metals.The results of the microstructural distribution at the bonding interface indicated metallurgical bonding,instead of the commonly believed solid-state bonding,in the explosive welded clad plate.In addition,the shear strength of the bonding interface of the explosive welded Al/Mg,Cu/Mg and SS/Mg clad plates can reach up to 201.2 MPa,147.8 MPa,and 128.4 MPa,respectively.The proposed research provides the design basis for laminated composite metal plates fabrication by explosive welding technology. 相似文献
19.
研究了8mm厚某铝合金圆筒真空电子束对接焊接工艺,分析了各个焊接规范参数特征区域的特征,探讨了特征参数与接头性能之间的对应关系,并通过一系列工艺试验,得出了该铝合金筒真空电子束焊对接的最佳焊接规范参数。 相似文献
20.