Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ultra-low hydrogen basic welding rod for P92 steel welding

A basic electrode, ultra-low hydrogen technology, used in welding media, welding equipment, welding/cutting media/materials, etc.

Active Publication Date: 2009-08-26
CHINA ELECTRIC POWER RES INST
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The development of calcium oxide slag-based P92 steel ultra-low hydrogen basic electrode has not yet been related to patents and literature reports at home and abroad

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
  • Ultra-low hydrogen basic welding rod for P92 steel welding
  • Ultra-low hydrogen basic welding rod for P92 steel welding
  • Ultra-low hydrogen basic welding rod for P92 steel welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] All embodiment welding rods are all made by common welding rod pressure coating machine:

[0025] 1. Choose Φ2.5 high chromium molybdenum steel wire rod as the steel core. Take 20 grams of ferromanganese, 40 grams of ferrosilicon, 15 grams of aluminum, 30 grams of nickel powder, 10 grams of quartz, 30 grams of ferro-niobium, 5 grams of ferro-vanadium, 50 grams of titanium dioxide, 200 grams of fluorite, 600 grams of marble, a total of 1000 grams And 40 grams of water glass, put into the powder mixer and mix for 10 minutes, then add the mixed powder in the welding rod press coater. Pressed into electrodes, the welding process parameters are: electrode drying (°C h): 350×2; preheating temperature (°C): 150-200; interlayer temperature (°C): 200-250; welding current (A): 110~130; welding voltage (V): 25~28; post-weld heat treatment specification (℃ h): 770±10×2~4; heating rate (℃ / h): 100~120; cooling rate (℃ / h ): 120~150. The results of mechanical properties are shown in...

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 ultra-low hydrogen basic electrode for welding P92 steel belongs to the field of welding in material processing engineering, and is mainly used in the welding of P92 steel. The development of calcium oxide slag-based P92 steel ultra-low hydrogen alkaline electrode has not yet been related to patents and literature reports at home and abroad. The present invention is characterized in that the electrode coating is a material containing the following mass percentages: 1-7% ferromanganese, 4-9% ferrosilicon, 1.5-2.5% aluminum, 3-8% nickel powder, 1-4% quartz, 3% ~6% ferroniobium, 0.5~1.0% ferrovanadium, 4.5~6% titanium dioxide, 20~30% fluorite, 40~60% marble. The technological performance of the developed electrode is good. Compared with the imported electrode, the developed electrode has good welding process characteristics such as small spatter, good fluidity of molten pool, uniform slag coverage, fine and beautiful weld shape, and easy slag removal. The diffusible hydrogen content of the deposited metal is effectively controlled, and the diffusible hydrogen content of the deposited metal is 1.985mL / 100g, which meets the requirements of the ultra-low hydrogen standard.

Description

technical field [0001] The invention belongs to the field of welding technology in material processing engineering, and the invention is mainly applied to the welding of P92 steel. Background technique [0002] Since the 1980s, countries such as the United States, Germany, France, and Japan have successively developed a series of new 9-12% chromium martensitic heat-strength steels, which can be used for supercritical and supercritical steels with steam parameters up to 600 / 610°C and 25MPa. Supercritical boiler unit. Typical steel grades are: T / P91, T / P92 (NF616) containing 9% Cr and T / P122 (HCM12A) containing 12% Cr. These steel types are high-performance heat-strength steels obtained by improving the original T / P9 and F12, and their high-temperature durable mechanical properties are significantly better than low-alloy pearlitic heat-resistant steels. The emergence of new martensitic heat-resistant steel provides the possibility and safety guarantee for the development of ...

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): B23K35/365
Inventor 徐德录陈玉成李现兵韩钰王立全
Owner CHINA ELECTRIC POWER RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com