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Hastelloy alloy composite material welding and heat treatment process method in modular production

A technology of Hastelloy and composite materials, which is applied in the field of welding and heat treatment in the welding of Hastelloy composite materials in modular production, and can solve the problems of difficult welding technology, long working cycle, and large amount of weld deposit metal filling and other problems to achieve the effect of avoiding cracking and unqualified defects, eliminating welding residual stress, and restoring plasticity and toughness

Active Publication Date: 2022-03-29
江苏利柏特股份有限公司
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  • Claims
  • Application Information

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Problems solved by technology

In particular, the welding technology of Hastelloy composite materials with large diameter and large wall thickness is more difficult, the process is more complicated, the requirements for preheating temperature, interpass and interlayer temperature, and heat input are high, and the amount of deposited metal in the weld is large. The working cycle is long, and the welder's operation skills are required to be high
These characteristics make it impossible for conventional welding and heat treatment processes to complete the welding work described

Method used

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  • Hastelloy alloy composite material welding and heat treatment process method in modular production
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  • Hastelloy alloy composite material welding and heat treatment process method in modular production

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Embodiment Construction

[0106] The present invention will be described in further detail below through specific examples.

[0107]The large diameter and large wall thickness of the present invention generally refer to materials with an outer diameter greater than 508mm and a wall thickness of 15-52mm.

[0108] The welding of the Hastelloy composite material in the present invention is suitable for butt welding of annular workpieces such as pipe containers, and is also suitable for butt welding of plate-mounted workpieces.

[0109] Such as Figure 1 to Figure 9 As shown, a Hastelloy composite material welding and heat treatment process method in modular production includes the following steps:

[0110] A. Preparation before welding, including the following sub-steps:

[0111] a1) Determine the execution standards of welding and heat treatment;

[0112] The execution standard in this embodiment is:

[0113] ASME Ⅸ-2017 "Welding and Brazing Procedures, Welders, Brazers, Welding and Brazing Operators...

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Abstract

The invention discloses a Hastelloy alloy composite material welding and heat treatment process method in modular production, which is used for welding Hastelloy alloy composite materials in modular production, and can be suitable for welding annular welding seams and longitudinal welding seams. The method comprises the following steps: firstly, welding a groove of a base layer base metal to form a base layer welding seam, then, back chipping and polishing, then, carrying out back cover welding, welding two transition layers, and carrying out stress relief heat treatment, so that the welding stress during welding of a hastelloy covering layer base metal can be reduced, and finally, welding a groove of the covering layer base metal to form a covering layer welding seam. According to the welding and heat treatment process, the strength and toughness of the base layer material are met, the strong internal stress generated by hastelloy deposited metal of the coating base material on the base layer base material, especially the bonding surface base material, is eliminated, and the product welding seam quality is stable and reliable.

Description

technical field [0001] The invention relates to a welding and heat treatment process, in particular to a welding and heat treatment process in the welding of Hastelloy composite materials in modular production. Background technique [0002] At present, in modular production, the welding and heat treatment process of containers and process pipes or composite material plates is very difficult and requires high quality. In particular, the welding technology of Hastelloy composite materials with large diameter and large wall thickness is more difficult, the process is more complicated, the requirements for preheating temperature, interpass and interlayer temperature, and heat input are high, and the amount of deposited metal in the weld is large. The working cycle is long, and the welder's operation skills are required to be high. These characteristics make conventional welding and heat treatment processes unable to complete the described welding work. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/235B23K9/32
CPCB23K9/167B23K9/235B23K9/32
Inventor 沈斌强王飞方战华陈杰恒何仲喜鑫陈益希
Owner 江苏利柏特股份有限公司
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