Efficient hot-strength steel welding rod

A heat-strength steel and high-efficiency technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of high brittle and hard tendency, hydrogen-induced cracks, delayed cracks, etc., and achieve increased fluidity and impact The effect of improving toughness and increasing the number

Inactive Publication Date: 2022-01-18
TIANJIN BRIDGE WELDING MATERIALS GROUP +2
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the chromium-molybdenum steel welds have high temperature, high brit

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
  • Efficient hot-strength steel welding rod
  • Efficient hot-strength steel welding rod
  • Efficient hot-strength steel welding rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-efficiency heat-strength steel welding rod, the welding wire composition is as shown in Table 1, and the coating composition is as shown in Table 2. Mix the raw materials of the coating evenly, add 20% water glass of coating weight to it, mix well, Send the wet-mixed powder into the hydraulic press, wrap it on the welding core, and bake it at low temperature, medium temperature and high temperature. The concentration of the water glass is 42 degrees Baume; the potassium-sodium ratio of the water glass is 2.5:1. The low temperature baking temperature is 70°C, the medium temperature baking temperature is 130°C, and the high temperature baking temperature is 370°C.

Embodiment 2

[0035] The only difference from Example 1 is that the components of the welding core are shown in Table 1, and the components of the coating are shown in Table 2.

Embodiment 3

[0037] The only difference from Example 1 is that the components of the welding core are shown in Table 1, and the components of the coating are shown in Table 2.

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 provides an efficient hot-strength steel welding rod. The welding rod is composed of a welding core and a coating wrapping the surface of the welding core. According to the efficient hot-strength steel welding rod, the content of Cr and Mo in deposited metal is strictly controlled by controlling impurity components of raw materials, barium fluoride is added to improve the physical and chemical properties of slag, the melting point, viscosity and surface tension of the slag are adjusted, the fluidity of the slag is improved, and meanwhile the content of hydrogen in the deposited metal is reduced. Cerium oxide is added so that a welding seam can be purified, the impact toughness of the welding seam at the normal temperature is obviously improved, rare earth has the effects of deterioration and purification on welding seam metal, the number of acicular ferrite can be obviously increased, M-A components are reduced, and the form, size and distribution of inclusions are changed. On the basis, silicate and carbonate are subjected to optimal matching, and finally the welding rod has excellent hydrogen corrosion resistance, good high-temperature resistance and good manufacturability.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a high-efficiency heat-strength steel welding rod. Background technique [0002] Chromium-molybdenum steel electrode is a common welding material for pressure vessels. It is widely used in oil refining, chemical industry, various hydrogenation units and reforming hydrogenation units. The electrode is added with 1.0-1.5% Cr, 0.4-0.65% Mo and other alloy elements , significantly improves the high temperature strength limit and creep limit of the material, has excellent hydrogen corrosion resistance and good high temperature resistance strength, and is the preferred welding material for high temperature and high pressure vessel shells and heads. [0003] Chromium molybdenum steel electrodes are widely used in high temperature and high pressure hydrogen environment because of their excellent hydrogen corrosion resistance and high temperature resistance. Because 2.25Cr1Mo, 3Cr1Mo, 3Cr...

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
IPC IPC(8): B23K35/30B23K35/365B23K35/40
CPCB23K35/3086B23K35/365B23K35/404B23K35/3602B23K35/0272
Inventor 郑子行姚旭蔡浪浪张志涛
Owner TIANJIN BRIDGE WELDING MATERIALS GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap