共查询到18条相似文献,搜索用时 46 毫秒
1.
2.
药芯成分对自保护药芯焊丝焊缝脱渣性的影响 总被引:2,自引:0,他引:2
考察了自保护药芯焊丝药芯成分中萤石,金红石,大理石,铝镁合金和氧化镁对焊缝脱渣性的影响。结果表明:焊缝脱渣性与熔渣中MgO/TiO2的比值有密切关系,适当的控制MgO/TiO2比值,可有效地消除焊缝表面粘渣。 相似文献
3.
4.
5.
国外焊接材料的发展动态及加快国产药芯焊丝发展的建议 总被引:3,自引:0,他引:3
概要地介绍了国外焊接材料( 主要是药芯焊丝) 的发展动态,对大力发展高效焊材、改进MAG 焊材的工艺性能及力学性能方面的工作也作了介绍,并就如何加快国产药芯焊丝产业的发展提出了建议。 相似文献
6.
7.
药芯焊丝的发展及其在船舶工业中的应用 总被引:1,自引:1,他引:0
药芯焊丝具有比手工焊条、实芯焊丝更多的优点,已在世界范围内成为一种最有发展前途的高效焊接材料。本文介绍了药芯焊丝的特点、分类以及美、苏、日和欧洲各工业国家生产和使用药芯焊丝的情况,着重介绍药芯焊丝在造船工业中,尤其是在焊接HY-80、HSLA-80和HY-100等高强度钢中的应用。 相似文献
8.
9.
10.
以ES01T1型药芯焊丝为例,分析了药芯焊丝在船舶焊接中气孔和凹坑问题的影响因素,从材料选择、焊接工艺控制和改善现场气保护状态等方面提出防止对策,有助于药芯焊丝的正确应用,提高了船舶焊接质量。 相似文献
11.
目的针对手工包装包芯线卷效率低和包装质量参差不齐等问题,设计一种最大质量为1500 kg的包芯线卷自动化包装机。方法根据包芯线卷的主要参数和包装工艺流程,结合包芯线卷在包装过程中的实际要求进行包装机的结构设计,包括包膜准备装置、热封装置、焊接系统、气压系统。结果设计出了完整的总体尺寸为3200 mm×1200 mm×2000 mm的包芯线卷自动包装机,完成了包装机模拟装配仿真、气压系统的调试。仿真结果表明,大小膜牵引器速度为0.11~0.5 m/s;关键零部件U形钩的有限元分析结果表明,最大位移发生在U形钩底部,其最大等效应力为29.871 MPa,装置的强度满足设计要求。结论总结包芯线包装目前存在的问题,从满足企业可持续化需求角度对包装机进行了创新设计与仿真优化,实现了包芯线卷自动化、标准化包装,为企业节约了人工成本。 相似文献
12.
A high carbon content in a ledeburite-martensite deposit provides high wear resistance. This can be accomplished in hardfacing by MAG welding with covered electrodes, alloying fluxes, and flux-cored wires. Hardfacing with covered electrodes is not efficient, whereas application of alloying fluxes is suitable only for the flat welding position. Hardfacing by flux-cored MAG welding, however, is efficient and suitable also for out-of-position welding, i.e., in the horizontal-vertical and overhead positions, which is particularly important in maintenance. The paper deals with the investigations of the influence of hardfacing-weld alloying by means of the cored-wire filling in hardfacing both by CO2 welding and welding with no externally supplied shielding medium. The efficiency of alloying the hardfacing weld depended on the composition and the filling ratio of the wire. In hardfacing of martensite-ledeburite deposits, the high carbon content in the deposit was provided by the addition of graphite to the cored-wire filling. A result of the high graphite content in the filling was a reduction of the filling ratio of the wire, and, consequently, weaker alloying of the hardfacing weld. As little as 10 wt.% graphite in the wire filling substantially affects alloying of the hardfacing weld. In this case, the amount of carbide-forming elements in the hardfacing weld will be reduced by around 4 wt.% whereas the carbon content will increase by as little as 1%, which, however, is enough to obtain high-quality martensite-ledeburite wear-resistant deposits with S-BC3 cored wires and with no externally supplied shielding medium of which the chemical composition, structure, and wear resistance were quite comparable to those obtained with a CrWC 600 covered wire (produced by SZ-Elektrode, Jesenice). Advantages of the cored wire over the covered electrode are substantially higher performance and lower consumption of the electric current. 相似文献
13.
14.
15.
16.
17.
18.
自保护药芯焊丝多为高碱性渣系焊接材料,焊接工艺性较差。药芯组分对自保护药芯焊丝的全位置焊接性、电弧稳定性、飞溅性等工艺因素有重要影响。本文分析了Fe2O3、CaCO3、Al-Mg、BaF2及Fe粉等药芯组分对工艺性的影响。研究表明:Fe2O3、CaCO3、Al-Mg、BaF2及Fe粉的质量分数分别为9%~13%、8%~12%、10%~20%、5%~10%、40%~50%时,工艺性良好。此外,药芯组分的预处理、钢带的清洗以及填充率的控制等加工制造过程对工艺性也有重要的影响,要严格控制各个环节。 相似文献