Supercharge Your Innovation With Domain-Expert AI Agents!

A Welding Method of Chromium-Molybdenum-Vanadium Steel for Ultra-Thickness Pressure Vessels

A technology for pressure vessel and chrome molybdenum vanadium steel, which is used in household vessels, welding equipment, welding/welding/cutting items, etc., can solve the problems of cold crack joints, low welding efficiency, lack of fusion, etc. Simple, ensure the effect of mechanical properties

Active Publication Date: 2017-05-24
青岛兰石重型机械设备有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low welding efficiency, lack of fusion, cold cracks and embrittlement of joints in the welding process in the prior art

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
  • A Welding Method of Chromium-Molybdenum-Vanadium Steel for Ultra-Thickness Pressure Vessels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The specific implementation cases of the patent of the present invention will be described in detail in conjunction with the accompanying drawings.

[0016] In this implementation case, 12Cr2Mo1VR is used as the base material, the thickness is 210mm, and the way of butt jointing of steel plates with the same thickness is adopted. The following welding measures are adopted for the welding of the chromium molybdenum vanadium steel:

[0017] 1) The groove is processed by mechanical processing method at the butt joint. The groove form is a single-sided U-shaped groove, the blunt edge of the groove is 7-9mm, and the bottom of the groove is a circular arc.

[0018] 2) The two chromium-molybdenum-vanadium steel plates to be welded are butted and fixed by spot welding.

[0019] 3) Submerged arc narrow gap welding: Preheat the workpiece to be welded before welding, the preheating temperature is ≥180°C, and use submerged arc narrow gap welding to perform multi-pass welding from ...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a welding method of chrome-molybdenum-vanadium steel for super-thickness pressure vessels, which belongs to the field of welding technology, and solves the quality problems of low welding efficiency, lack of fusion, cold cracks and embrittlement of joints in the welding process in the prior art. The welding method includes the following processes: (1) Groove processing at the butt joint end, and the groove form is a single-sided U-shaped groove; (2) Two chrome-molybdenum-vanadium steel plates to be welded are butt-jointed and fixed by spot welding; (3) Narrow gap submerged arc welding is used for multi-pass welding from the inside to the outside; (4) After root cleaning on the reverse side, the corresponding electrode is used for electrode arc welding. The invention can weld large-thickness chrome-molybdenum-vanadium steel plates with a thickness not less than 100mm, and the quality of the welded joint is excellent, ensuring that the mechanical properties of each area of ​​the welded joint are qualified.

Description

technical field [0001] The invention belongs to the field of welding and relates to the welding of ultra-thick chromium molybdenum vanadium steel. Background technique [0002] Chromium-molybdenum-vanadium steel for pressure vessels is based on chromium-molybdenum heat-resistant steel by adding alloying element vanadium to improve the wear resistance and toughness of steel. However, with the increasing size of domestic pressure vessels and the increasing pressure of the vessels, the chrome-molybdenum-vanadium steel for pressure vessels began to gradually develop in the direction of high strength and ultra-thickness. [0003] The weldability of chromium molybdenum vanadium steel for ultra-thick pressure vessels is poor. The selection of welding groove and welding process are the key steps in welding chromium molybdenum vanadium steel. If the groove opening is unreasonable and the welding parameters are not selected properly during welding, it will It leads to problems such a...

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): B23K9/18B23K9/235B23K33/00B23K101/12B23K103/04
CPCB23K9/18B23K9/235B23K33/00
Inventor 于磊孔凡红师清豪王天先类成龙
Owner 青岛兰石重型机械设备有限公司
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