A metal component submerged arc surfacing welding forming method

A metal component and submerged arc surfacing technology, which is applied in arc welding equipment, metal processing equipment, welding equipment, etc., to achieve uniform structure, no macro segregation, and outstanding performance in corrosion resistance

Active Publication Date: 2017-08-25
NANFANG ADDITIVE MFG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for those who want to use this technology in the rapid additive manufacturing of large workpieces, that is, direct submerged arc surfacing, there are few practical applications due to many process difficulties.

Method used

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  • A metal component submerged arc surfacing welding forming method
  • A metal component submerged arc surfacing welding forming method
  • A metal component submerged arc surfacing welding forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Horizontal production of flanges. This example describes the process of making flanges by submerged arc surfacing welding. The material is 40Cr and the base material is Q235. The equipment used includes:

[0028] (1) Rotary support table; (2) Power supply; (3) Welding torch; (4) Automatic wire feeding device; (5) Automatic flux delivery and recovery device; (6) Heating device; (7) Cooling device; (8) Substrate; (9) central control device (computer).

[0029] figure 2 It is a schematic explanatory diagram for showing the submerged arc additive manufacturing method of this embodiment, and the power supply, automatic wire feeding device and other devices are omitted in the figure. Such as figure 2 As shown, the welding wire 101 is specially prepared, C element: 0.09-0.10%, other elements are in accordance with the requirements of SA508Gr3Cl1, the diameter is 4mm, and the quantity is 2 (that is, welding gun 401a, 401b, collectively referred to as welding gun 401 in the...

Embodiment 2

[0040] This example describes the manufacture of CPR1000 nuclear power conventional island integrated low-pressure rotor by horizontal submerged arc additive manufacturing method. The material is 30Cr2Ni4MoV, and the base material is 42CrMo rod. The equipment used includes:

[0041] (1) Swivel support platform;

[0042] (2) Welding power supply;

[0043] (3) Welding torch;

[0044] (4) Automatic wire feeding device;

[0045] (5) Automatic delivery of auxiliary materials and automatic recovery of auxiliary materials;

[0046] (6) Heating device;

[0047] (7) cooling device;

[0048] (8) Substrate;

[0049] (9) Control device.

[0050] figure 2 It is a schematic explanatory diagram for showing the submerged arc additive manufacturing method of this embodiment, and the power supply, automatic wire feeding device and other devices are omitted in the figure. The material power parameters are as follows:

[0051] 1) Choose welding wire 102, diameter 3mm, C content 0.15-0.1...

Embodiment 3

[0069] In this example, a tapered workpiece is vertically formed by submerged arc additive manufacturing. The material of the workpiece is RCC-M standard 18MnD5, and the material of the base material is Q235. The equipment used in this embodiment includes,

[0070] (1) Rotary support table; (2) Power supply; (3) Welding torch; (4) Automatic wire feeding device; (5) Flux automatic conveying and recovery device; (6) Flux blocking device; (7) Heating device; (8) ) cooling device; (9) substrate; (10) control device.

[0071] Figure 4 It is a schematic explanatory diagram showing the submerged arc additive manufacturing method of this embodiment, for the sake of simplification, the equipment is omitted in the figure. The selected parameters are: wire rod diameter 3mm, chemical composition C: 0.12-0.14%, the remaining elements are in accordance with the requirements of 18MnD5, the auxiliary material is the standard melting flux SJ101, the welding current is set to 600A, the weldi...

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Abstract

A submerged arc additive manufacturing method for a metal structure having great mechanical properties. The submerged arc welding method for forming the metal structure is such that: two electrodes of a welding power source (12) respectively are connected to a welding torch (6, 401, 602, and 603) and to a substrate (2, 201, 202, and 203), a granular flux (3, 301, 302, and 303) and a metal welding wire (1, 101, 102, and 103) are simultaneously conveyed onto a surface of the substrate, power is turned on, an electric arc is produced between the substrate and the welding wire covered by the flux, thus allowing the welding wire and the surface of the substrate to be partly molten to form a weld pool on the surface of the substrate, conveyance of the welding wire and the flux is continued, and relative movement paths of the welding torch and of the substrate are controlled on the basis of modulus data of parts, thus implementing layer-by-layer hardfacing deposition on the substrate to form the metal structure.

Description

technical field [0001] The invention relates to a metal component submerged arc surfacing welding forming method. Background technique [0002] At present, key components in the heavy equipment industry, such as low-alloy high-strength steel and heat-resistant alloy materials used in nuclear power and pressure vessels in the petrochemical industry, metallurgical roller steel, power station rotor steel and other component materials are mainly realized by casting and forging technology, using hundreds of tons of large steel ingots Smelting, casting and 10,000-ton hydraulic presses and other heavy-duty forging industrial equipment forging and pressing, supplemented by final machining. This traditional method can basically meet the technical quality requirements, but the manufacturing process is numerous, the production cycle is long, and the utilization rate of materials is low, resulting in high component costs; The petrochemical container is mainly solved by multi-stage asse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/04B23K9/18
CPCB23K9/04B23K9/18
Inventor 不公告发明人
Owner NANFANG ADDITIVE MFG TECH
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