Friction welding method of non-magnetic metal material and special-shaped metal material
A technology of non-magnetic materials and metal materials, applied in welding equipment, metal processing, metal processing equipment, etc., can solve the battery corrosion effect, dissimilar material melting point, thermal conductivity and plastic flow ability are quite different, and can not meet the welding technical requirements and other issues to achieve the effect of performance improvement and cost reduction
Active Publication Date: 2016-06-15
山西环界石油钻具制造股份有限公司
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Problems solved by technology
At the same time, due to the large difference in melting point, thermal conductivity, and plastic flow ability of dissimilar materials, the selection of process parameters is quite different from that of friction welding of the same material.
According to the ordinary friction welding technology, the workpieces with large differences between the two materials cannot meet the welding technical requirements.
The liquid phase welding technology and ordinary friction welding technology of other traditional processes are very easy to produce battery corrosion effect after welding between different metal types, which cannot meet the requirements of products that can prevent battery corrosion and anti-magnetic properties
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[0028] A kind of friction welding method of non-magnetic metal material and special-shaped metal material, such as figure 1 As shown, the raw materials use the joint 1 made of non-magnetic material (non-magnetic steel) and the pipe body 2 made of 4145H material;
[0029] The welding area of the non-magnetic material is 20% less than that of the 4145H material, and the specific parameters are as follows:
[0030] Non-magnetic material joint 1 parameters, outer diameter 168.3mm, inner diameter 71.4, 400mm long, hardness and mechanical properties meet API7-1 requirements. Non-magnetic material joint 1 car with an inner diameter of 98.7mm and a depth of 10mm. The inner diameter of the inner diameter of 98.7mm and the inner diameter of 71.4mm are transitioned with a 45-degree slope. The end face of the inner diameter is chamfered at 2×45°, and the end face is turned at an angle of 3°. Among them, the processing parameters of AISI4145H material pipe body 2, the outer diameter is ...
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Abstract
The invention belongs to the technical field of processing of oil drilling devices and particularly relates to a friction-welding method for a non-magnetic metal material and a special-shaped metal material with an aim to solve the technical problem about friction welding between two utilized different materials, namely non-magnetic steel and 4145H in producing non-magnetic drilling rigs. According to the technical scheme, the two materials, namely a joint made of the non-magnetic material and a pipe body made of the 4145H material are utilized; the welding area of the non-magnetic material is less than that of the 4145H material; the non-magnetic material is subjected to laser diffraction preheating before welding and is welded according to determined welding parameters, and when friction weld craters are cooled to the indoor temperature, the friction weld craters are covered with a liquid nitrogen gas mask to subject the weld craters of the non-magnetic joint to minus 150-degree subzero treatment. With the friction-welding method, the problem about friction welding of the special-shaped material is solved, and carbon steel low in cost is taken as the middle portion of the drilling rig by means of the method, so that cost is lowered, performance is multiplied, the position of the joint never cracks in practical use, and customer requirements are fully met.
Description
technical field [0001] The invention belongs to the technical field of oil drilling equipment processing, in particular to a friction welding method for non-magnetic metal materials and special-shaped metal materials. Background technique [0002] Friction welding is a solid state welding method. Using friction heat as the heat source, the two friction surfaces are heated to a plastic state through mechanical friction movement and axial pressure, and then the same metal and dissimilar metals are connected using this heat. Over the years, friction welding has been valued by the manufacturing industry for its high-quality, high-efficiency, energy-saving, and pollution-free technical features. [0003] Currently there are technical difficulties, and the application of friction welding technology is basically between the same materials or close to the materials. However, the research and application of friction welding technology between materials with different densities and ...
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IPC IPC(8): B23K20/12B23K20/24
CPCB23K20/1225B23K20/24B23K2101/06B23K2103/18
Inventor 宫晋文闫献国宫飞南永强宫宜欣扎哈罗夫·谢尔盖·尤里耶维奇
Owner 山西环界石油钻具制造股份有限公司