Machining technology for submerged-arc welding straight seam steel pipe of shock absorption structure

A shock absorption and processing technology, applied in the field of straight seam submerged arc welded steel pipes, can solve the problems of comparable shock resistance of the weld, and achieve the effects of avoiding pollution, uniform size distribution, and reducing aperture

Active Publication Date: 2018-04-06
HEFEI ZIKING PIPE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although submerged arc welded straight seam steel pipes are welded with fillers and particles protect the flux into submerged arcs, the impact resistance of the welds is still not comparable to that of seamless steel pipes.

Method used

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  • Machining technology for submerged-arc welding straight seam steel pipe of shock absorption structure
  • Machining technology for submerged-arc welding straight seam steel pipe of shock absorption structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Processing of submerged arc welded straight seam steel pipe: carbon steel plate is selected as the base layer and metal steel plate is used as the cladding layer, and the bimetallic composite steel plate is made by hot rolling process, and is milled, pre-bent, JCO formed, and seamed Pre-welding, submerged arc internal welding base carbon steel plate, submerged arc external welding cladding metal plate, ultrasonic inspection, X-ray inspection, finishing treatment, that is, submerged arc welded straight seam steel pipe;

[0021] (2) Processing of shock-absorbing materials: Heat 40kg magnesium ingot to 645-650°C and keep it warm. When the melting rate of magnesium reaches 50%, use a permanent magnetic stirrer to start stirring. After the magnesium ingot is completely melted, add 25kg of aluminum ingot and continue heating to 660°C. -665°C heat preservation and stirring, after the aluminum ingot is completely melted, add 5kg calcined kaolin, 5kg molecular sieve activatio...

Embodiment 2

[0024] (1) Processing of submerged arc welded straight seam steel pipe: carbon steel plate is selected as the base layer and metal steel plate is used as the cladding layer, and the bimetallic composite steel plate is made by hot rolling process, and is milled, pre-bent, JCO formed, and seamed Pre-welding, submerged arc internal welding base carbon steel plate, submerged arc external welding cladding metal plate, ultrasonic inspection, X-ray inspection, finishing treatment, that is, submerged arc welded straight seam steel pipe;

[0025] (2) Processing of shock-absorbing materials: Heat 40kg magnesium ingot to 645-650°C and keep it warm. When the melting rate of magnesium reaches 50%, use a permanent magnetic stirrer to start stirring. After the magnesium ingot is completely melted, add 25kg of aluminum ingot and continue heating to 660°C. -665°C heat preservation and stirring, after the aluminum ingot is completely melted, add 5kg calcined kaolin, 5kg molecular sieve activatio...

Embodiment 3

[0028] (1) Processing of submerged arc welded straight seam steel pipe: carbon steel plate is selected as the base layer and metal steel plate is used as the cladding layer, and the bimetallic composite steel plate is made by hot rolling process, and is milled, pre-bent, JCO formed, and seamed Pre-welding, submerged arc internal welding base carbon steel plate, submerged arc external welding cladding metal plate, ultrasonic inspection, X-ray inspection, finishing treatment, that is, submerged arc welded straight seam steel pipe;

[0029] (2) Processing of shock-absorbing materials: Heat 40kg magnesium ingot to 645-650°C and keep it warm. When the melting rate of magnesium reaches 50%, use a permanent magnetic stirrer to start stirring. After the magnesium ingot is completely melted, add 25kg of aluminum ingot and continue heating to 660°C. -665°C heat preservation and stirring, after the aluminum ingot is completely melted, add 5kg calcined kaolin, 5kg molecular sieve activatio...

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Abstract

The invention discloses a machining technology for a submerged-arc welding straight seam steel pipe of a shock absorption structure, and relates to the technical field of straight seam submerged-arc welding steel pipes. The machining technology includes the following steps that (1) the submerged-arc welding straight seam steel pipe is machined; (2) shock absorption materials are machined; and (3)the shock absorption structure is formed. By adoption of the machining technology, the produced shock absorption materials are coated on the submerged-arc welding straight seam steel pipe to form theshock absorption structure, and therefore the shock absorption performance of the submerged-arc welding straight seam steel pipe is excellent; and meanwhile, the using amount of metal magnesium and aluminum is reduced, and the shock absorption performance of the shock absorption materials is enhanced while cost is reduced.

Description

Technical field: [0001] The invention relates to the technical field of straight seam submerged arc welded steel pipes, in particular to a processing technology for submerged arc welded straight seam steel pipes with an impact absorption structure. Background technique: [0002] The submerged arc welding straight seam steel pipe adopts the submerged arc welding technology, uses filler welding, particle protection flux submerged arc, and the production diameter can reach 1500mm. LSAW is the English abbreviation of submerged arc welded straight seam steel pipe. The production process of submerged arc welded straight seam steel pipe includes JCOE forming technology and coil forming submerged arc welding technology. When the diameter is large, two steel plates can be used for rolling, which will form a phenomenon of double welds. [0003] Although submerged arc welded straight seam steel pipes are welded with fillers and submerged arc particles protect the flux, the impact resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/09C22C1/08C22C49/04C22C47/08C22C49/14C22C101/06
CPCC22C1/08C22C47/08C22C49/04C22C49/14B21C37/09C22C1/083
Inventor 彭静吴宏根郑家胜李勇
Owner HEFEI ZIKING PIPE INC
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