Welding method of laser brazing of X 80 pipeline steel

A welding method and pipeline steel technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., to achieve uniform preheating effect and avoid the effect of multiple processes

Active Publication Date: 2013-07-10
邳州市博睿投资管理有限公司
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Problems solved by technology

[0003] The invention is a welding method for long-distance oil pipelines, which uses laser to preheat materials, melts solder as the same heat source, avoids multi-cha

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  • Welding method of laser brazing of X 80 pipeline steel
  • Welding method of laser brazing of X 80 pipeline steel
  • Welding method of laser brazing of X 80 pipeline steel

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Embodiment Construction

[0012] (1) Welding design: the cross-section of the pipeline steel weldment is as follows: image 3 As shown, according to the thickness of X80 pipeline steel and welding requirements, the V-shaped weld is used to fill the brazing filler metal. In order to ensure the welding, hard brazing filler metal is used. The material is silver-based brazing filler metal. The brazing flux is KBF4 type brazing flux. , the maximum power used is 10kW; in order to determine the specific process parameters, a test welding is carried out, and the schematic diagram of the test welding is as follows figure 2 As shown, firstly, the pre-welding treatment of the test welding sample is carried out, the wedge angle is adjusted to zero, the laser power output value is adjusted, and the speed of 1m / min is preheated, and the temperature of the inner wall of the test welding sample is measured by the thermal sensor at the inner wall of the pipeline steel. , so that the temperature of the inner wall reach...

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Abstract

The invention relates to a welding method of laser brazing of X 80 pipeline steel and belongs to the advanced manufacturing technology field. High energy laser source is utilized as unified preheating light source and welding light source to perform steps which comprises laser-bounce, transverse beam splitting, energy distribution and inward refocusing are performed on laser through a reflecting mirror, a spectroscope and a focusing mirror, the purpose of laser transverse beam energy distribution is achieved by adjusting the position of the spectroscope, distance between a front laser beam and a rear laser beam is adjusted by adjusting the size of a wedge angle of the spectroscope to form into the front laser beam and the rear laser beam, the front laser beam is served as a preheating light beam, the rear laser beam is served as a welding beam, and energy dispersion of the preheat light beam is performed through a concave lens when the preheating beam is utilized to preheat. The welding method of the laser brazing of the X 80 pipeline steel solves the problem that nonuniform weld microstructure caused by common welding is easy to cause electrochemical corrosion.

Description

technical field [0001] The invention relates to a welding method for laser brazing of X80 pipeline steel, belongs to the field of advanced manufacturing technology, and solves the problem that electrochemical corrosion is easily caused by uneven weld seam structure caused by conventional welding. Background technique [0002] X80 pipeline steel is the highest-grade steel used in China's active pipelines. For long-distance oil and gas pipelines, welding is an indispensable process. At present, the main welding processes used in pipeline welding construction are: cellulose welding rod and self-protection agent The combined process of cored wire semi-automatic welding (SMAW+FCAW, commonly referred to as semi-automatic welding), argon-rich mixed gas shielded automatic welding process (GMAW, commonly referred to as automatic welding) and the combined process of cellulose electrodes and low-hydrogen electrodes (SMAW, Usually called manual welding); in these traditional welding pro...

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Application Information

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IPC IPC(8): B23K1/005
Inventor 孔德军叶存冬张垒付贵忠王文昌蔡金龙吴永忠龙丹
Owner 邳州市博睿投资管理有限公司
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