共查询到19条相似文献,搜索用时 109 毫秒
1.
2.
3.
对高碳盘条的焊接区拉丝断口进行了形貌的观察和分析。结果表明,高碳盘条焊接区发生拉拔断裂的主要原因有以下三种:焊接过程中未完全挤出的氧化物夹杂;焊接后的热处理温度过高导致盘条的组织发生过热以及焊接区表面润滑不良导致拉拔过程中产生表面横向裂纹.形成裂纹源。 相似文献
4.
5.
6.
7.
ER50-6盘条拉拔开裂原因分析 总被引:1,自引:0,他引:1
低合金焊接用钢盘条在拉拔过程中有时出现劈裂现象,为找出其原因,对每一道次的钢丝取样进行金相分析,发现劈裂钢丝对应的盘条和半成品钢丝中都存在严重的横向珠光体带状偏析,且盘条的横向带状偏析与连铸坯的内部裂纹有很好的对应关系,盘条中存在的严重横向带状偏析是造成钢丝劈裂的主要原因。 相似文献
8.
9.
10.
11.
H08A沸腾钢的冶炼工艺对成品焊丝质量的影响 总被引:1,自引:0,他引:1
对鞍钢第一炼钢厂转炉冶炼的H0 8A焊条钢在焊丝生产过程中出现焊接性能恶化的现象进行了分析 ,认为是冶炼工艺不当所致 ,并提出了改进措施 ,取得了良好的效果。 相似文献
12.
管线配套焊丝钢生产缓冷工艺研究 总被引:1,自引:0,他引:1
通过测定焊丝钢冷却过程连续过冷曲线,制定了管线配套焊丝钢盘条的冷却工艺。通过调整冷却工艺参数,使盘条强度满足了用户要求。拉拔试验结果表明,盘条可以不经过热处理直接拉拔到用户要求线径,拉拔后焊丝满足了用户缠绕与送丝要求。 相似文献
13.
14.
搭建了双电弧集成冷丝复合焊接系统,研究了冷丝不同位置对焊接过程的影响机理,其中包括冷丝作用位置对其加热熔化作用及表面成形的影响。实验结果表明:冷丝从两引导焊丝正前方送入时,熔池前端对冷丝的加热熔化作用不充分,冷丝末端会顶触熔池底部,随着冷丝的持续送进和母材的向后移动,某一时刻冷丝回弹,焊丝末端的熔滴弹出落在母材表面形成大颗粒飞溅。当冷丝从侧面送入时,熔池一侧的温度较低,影响熔池金属的流动,导致最终的焊缝成形不对称分布。当冷丝从两引导焊丝正后方送入熔池时,冷丝始终插入熔池中,焊接过程稳定,是理想的冷丝作用位置。此外,随着冷丝送丝速度的增加,两种脉冲电流模式(同相和反相)下,熔敷率均随之增加,且相差不大。同相脉冲电流下电弧对冷丝的加热熔化作用最强烈,反相脉冲电流下次之,直流模式下最弱。 相似文献
15.
16.
17.
18.
FANG Chen-fu HE Bin ZHAO Zhong-chao HU Xiao-guang JIANG Jia-zhong SHI Zhen 《钢铁研究学报(英文版)》2013,20(4):81-86
Cable welding wire (CWW) CO2 gas shielded welding is an innovative process arc welding with high efficiency, high quality and low consumption, in which cable wire is used as consumable electrode. CWW CO2 gas shielded welding and submerged arc welding (SAW) are used for contrast studies on processing property of high strength steel A36 used in ship structure. The results show that the shapes of weld seam, using CWW CO2 gas shielded welding and SAW, are good and no weld defect such as air hole, flaw, slag inclusion, incomplete fusion, lack of penetration and so on are found in the weld seam. Because the rotating of arc during CWW CO2 gas shielded welding process has a strong stirring effect on molten pool, the grain in the heat affected zone (HAZ) of the joints, using CWW CO2 gas shielded welding, is small. Tensile failure positions of joints by CWW CO2 gas shielded welding and SAW are all in the base metal, but tensile strength of CWW CO2 gas shielded welding joint is higher than that of SAW joint by an average of 2. 3%. The average impact energy of HAZ, using CWW CO2 gas shielded welding and SAW, is almost equal, but the average impact energy of the weld seam using CWW CO2 gas shielded welding is increased by 6%, and the average impact energy of the fusion line is increased by 7%. The 180° bending tests for the joints of CWW CO2 gas shielded welding and SAW are all qualified, and the joints hardness is all less than HV 355, but hardness of CWW CO2 gas shielded welding wire welding joint near the fusion line is obviously lower. It can be concluded that the properties of CWW CO2 gas shielded welding are better than those of the SAW joint, and CWW CO2 gas shielded welding is suitable for welding high strength steel A36 used in ship structure. 相似文献
19.
焊丝钢控冷工艺在标准型斯太尔摩冷却线上的实现 总被引:1,自引:0,他引:1
通过对酒钢标准型斯太尔摩冷却线生产ER70s-6焊丝钢的实验研究,给出了在标准型斯太尔摩冷却线上生产缓冷型焊丝钢的可行的生产工艺,实现了高线5.5mm焊丝钢在标准型斯太尔摩控冷线上正常生产达到可一次拉拔至1.2mm质量指标的目标。 相似文献