Manufacturing method of large-wall-thickness nickel-base alloy/carbon steel laminated structure composite pipe
A technology of nickel-based alloy and manufacturing method, which is applied in the direction of manufacturing tools, metal processing, tubular articles, etc., can solve the problems of crack design and unsuitable welding process, achieve excellent comprehensive mechanical properties, improve manufacturing efficiency, and ensure strength and toughness. effect of the requirement
Active Publication Date: 2017-05-10
BC P INC CHINA NAT PETROLEUM CORP +1
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The breach design and welding process described in the above-mentioned published manufacturing method are not applicable to the present invention
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[0025] see figure 1 , with large wall thickness UNS N08825 / X65 nickel-based alloy / pipeline steel layered structure composite plate prepared by "vacuum hot rolling + heat treatment" process as the experimental raw material plate, UNS N08825 nickel-based alloy layer 2 on one side, X65 carbon steel layer 1 With one side down, clean up the debris and hard blocks on both sides of the plate and then manufacture the composite pipe. The steps are as follows:
[0026] Step 1: According to figure 1 The medium groove design form is used to process the welding characteristic groove of UNS N08825 / X65 nickel-based alloy / pipeline steel layered structure composite plate. The depth and width of the "U" groove of UNS N08825 nickel-based alloy layer 2 are 5.5mm and 11mm, and the bottom of the groove is arc-shaped; the width, depth, angle and blunt edge of the "I+V" groove of X65 carbon steel layer 1 are 20mm, 12mm, 80° and 10mm respectively.
[0027] Step 2: Use JCO multi-pass progressive pres...
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Abstract
The invention discloses a manufacturing method of a large-wall-thickness nickel-base alloy / carbon steel laminated structure composite pipe. The manufacturing method comprises the steps that the 'U+I+V' special composite groove design is adopted, MAG welding, SAW welding and TIG welding are adopted for carrying out welding respectively according to the sequence of a prewelding point, a carbon steel layer, a transition layer and a nickel-base alloy layer deposited area, the manufacturing efficiency and quality of the composite pipe can be remarkably improved, the corrosion resistance of the coating layer nickel-base alloy can be ensured, and the strengthening and toughening requirements of the base layer carbon steel can also be met. A weld joint of the large-wall-thickness nickel-base alloy / carbon steel laminated structure composite pipe has the good appearance and excellent mechanical performance indexes, and the large-wall-thickness nickel-base alloy / carbon steel laminated structure composite pipe can be used for building of engineering facilities such as national acid oil and gas fields and chemical refining storage tanks.
Description
[0001] Technical field: [0002] The invention belongs to the technical field of manufacturing a large-wall-thick layered structure composite pipe, and in particular relates to a method for manufacturing a large-wall-thick nickel-based alloy / carbon steel layered structure composite pipe. [0003] Background technique: [0004] Nickel-based alloy / carbon steel layered structure composite pipe has excellent interface bonding strength and can well avoid quality problems such as delamination and collapse; it can meet the requirements of storage and transportation service conditions for strong corrosive media and maximize the advantages of the material Complementary, significantly reducing pipeline construction costs, improving pipeline corrosion resistance and safety and reliability. It will effectively solve the "four highs and one low" (that is, high CO 2 , high H 2 S, high Cl - , high salinity, low PH value) problems such as corrosion and failure of storage and transportation ...
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IPC IPC(8): B23K9/167B23K9/173
CPCB23K9/167B23K9/173B23K2101/06
Inventor 毕宗岳杨军刘海璋牛辉田磊赵勇席敏敏刘刚伟赵红波刘斌包志刚黄晓辉陈长青牛爱军
Owner BC P INC CHINA NAT PETROLEUM CORP