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高合金化碳化铬复合耐磨钢板对接仰焊有什么技术标准?

所属分类:公司动态 发布时间:2021-04-23 来源:https://www.lcnaimoban.com/ 浏览量:

仰焊时,高合金化碳化铬复合耐磨钢板悬空在上,操作者手持焊枪在下,向上施焊,焊接难度较大,加之焊枪宁夏堆焊耐磨钢板(5+5、12+4、6+4)和电缆线的重量,使焊接难度更大。
In overhead welding, the high alloy chromium carbide composite wear-resistant steel plate is suspended on the top, and the operator holds the welding gun down and upward, which makes the welding more difficult. In addition, the weight of the welding gun Ningxia surfacing wear-resistant steel plate (5 + 5, 12 + 4, 6 + 4) and cable makes the welding more difficult.
仰焊技术的难点在于熔池的铁水极易流淌下落,焊缝成形困难。虽然焊接熔滴的重力是向下的,阻碍着向熔池过渡,但是电弧的吹力和熔池铁水的表面张力是向上的,是熔滴过渡的主要力量。因此,仰焊时应严格控制焊接规范。
The difficulty of overhead welding technology is that the molten iron in the molten pool is easy to flow down and the weld is difficult to form. Although the gravity of welding droplet is downward, which hinders the transfer to molten pool, the blowing force of arc and the surface tension of molten iron in molten pool are upward, which are the main forces of droplet transfer. Therefore, the welding specification should be strictly controlled during overhead welding.
NM400耐磨板
①为了仰焊时单面焊双面成形,高合金化碳耐磨溜槽衬板(4+4、10+6、8+6)化铬复合耐磨钢板上面能焊透,高合金化碳化铬复合耐磨钢板的对接间隙(1.4-1.6mm)要保持预留准确。
① In order to weld on one side and form on both sides during overhead welding, the upper surface of high alloy chromium carbide composite wear-resistant steel plate (4 + 4, 10 + 6, 8 + 6) of high alloy carbon wear-resistant chute lining plate can be fully welded, and the butt gap (1.4-1.6mm) of high alloy chromium carbide composite wear-resistant steel plate should be reserved accurately.
②采用短路过渡焊法。
② Short circuit transfer welding method is adopted.
③焊接规范为:焊接电流120-130A;电弧电压18-19V;焊丝直径0.9-1.2mm。
③ Welding specification: welding current 120-130a; The arc voltage is 18-19v; The diameter of welding wire is 0.9-1.2mm.
④焊枪的角度见下图,焊枪稍向后倾。倾角不能过大,否则会造成焊法凸起和咬边。
④ The angle of the welding gun is shown in the figure below, and the welding gun tilts back slightly. The inclination angle should not be too large, otherwise it will cause bulge and undercut.
⑤焊枪运行轨迹应采用直线式或小幅摆动。
⑤ The welding torch trajectory should be linear or small swing.
⑥焊接速度要适当的稍快。电弧在熔池的停留时间不能过长,否则,熔池金属会下垂,焊缝表面出现凹凸不平,严重时会时熔池金属下落。
⑥ The welding speed should be a little faster. The residence time of the arc in the molten pool should not be too long, otherwise, the molten pool metal will sag, the weld surface will be uneven, and the molten pool metal will fall when it is serious.
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