低温下低碳钢的焊接方法

在低碳钢焊接的严峻冬季条件下,由于焊接接头的冷却速度,迅速使裂纹趋于增加,尤其是在第一个焊接重型结构中,易于开裂,因此该过程必须采取以下措施:

  • 预热,焊接过程严格保持间隙温度不应低于预热温度。
  • the use of ultra low hydrogen or hydrogen welding materials.
  • 为了增加焊接焊接时的焊接电流,焊接速度降低了,这是由于增加的焊接珠横截面区域和长度,如有必要,请预热。
  • the whole should be a continuous weld seam finish, avoid interruptions.
  • arc groove on the surface of the base material should not be beyond the need to fill the crater when extinction.
  • not possible under low temperature conditions, bending, straightening and assembly weldments.

Seamless pipe规格,标准和标识

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.