Unlock instant, AI-driven research and patent intelligence for your innovation.

Repair Welding Method of Dissimilar Materials for PWR Nuclear Grade Castings

A technology of dissimilar materials and pressurized water reactors, applied in welding equipment, arc welding equipment, manufacturing tools, etc.

Active Publication Date: 2017-07-07
SHENYANG BLOWER WORKS GRP NUCLEAR PUMP
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a method for repairing welding of dissimilar materials in pressurized water reactor nuclear grade castings, which can effectively solve the problem of repairing defects after finishing of castings

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Repair Welding Method of Dissimilar Materials for PWR Nuclear Grade Castings
  • Repair Welding Method of Dissimilar Materials for PWR Nuclear Grade Castings
  • Repair Welding Method of Dissimilar Materials for PWR Nuclear Grade Castings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment is repair welding of dissimilar materials, the process is as follows:

[0050] 1) The structure of the test piece is the same as that of Comparative Example 1.

[0051] 2) Welding method: Two methods are adopted: manual arc welding and argon tungsten arc welding.

[0052] 3) Selection of welding materials: select nickel-based alloy materials suitable for welding dissimilar materials, and have very good plasticity, toughness and corrosion resistance, ENiCrFe-3 and ERNiCr-3 to conduct experiments respectively.

[0053] 4) The welding process parameters are as follows in Table 1:

[0054] Table 1

[0055]

[0056] 5) Welding process control:

[0057] Because the physical and mechanical properties of the two materials are very different, in order to prevent thermal stress cracks, it is determined to preheat at least 205°C before welding, the first layer controls the temperature between each pass to not exceed 260°C, and the low-temperature stress relief ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a repair welding method for dissimilar materials of pressurized water reactor nuclear-grade castings. The method uses nickel-based alloy materials as welding materials, and performs repair welding on base material Z5CND13-04M castings by manual arc welding or argon tungsten arc welding. ; Wherein: the nickel-based alloy material is ENiCrFe-3 or ERNiCr-3; when the welding material is ENiCrFe-3: material specification φ3.2mm, welding current 80-125A, welding voltage ≤ 33V, welding speed ≥ 229mm / min ; When the welding material is ERNiCr‑3: material specification φ2.4mm, welding current ≤ 200A, welding voltage ≤ 25V, welding speed ≥ 127mm / min. The invention adopts dissimilar materials for repair welding, simultaneously preheats before welding, controls interlayer temperature during welding, and performs low-temperature stress relieving treatment after welding, so that various performance indexes of workpieces after repair welding meet standard requirements.

Description

technical field [0001] The invention relates to the technical field of material repair welding technology, in particular to a repair welding method of dissimilar materials for pressurized water reactor nuclear-grade castings, which is used for adopting RCC-M standard material Z5CND13-04M casting precision for non-pressure-bearing boundary parts of pressurized water reactor nuclear islands. Repair welding with exceeding standard defects after processing. Background technique [0002] RCC-M standard materials are used for the second and third stage pump impellers and suction section of the pressurized water reactor: martensitic stainless steel Z5CND13-04M castings. Defects will inevitably occur during casting and processing, and repair welding is required. The repair welding must be evaluated according to the RCC-M standard, and the welding can only be carried out after the process evaluation is qualified. Defects occur during finishing, and there are problems of heat treatme...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167B23K9/23
Inventor 张艳敏李刚刘恒范灵利李志庆田云
Owner SHENYANG BLOWER WORKS GRP NUCLEAR PUMP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com