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A heat-resistant welding rod with excellent crack resistance

A technology of anti-crack performance and welding rod, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of poor heat resistance, affecting welding work, poor anti-cracking performance, etc., and achieve good arc ignition , It is not easy to break the arc, and the surface scale is fine.

Active Publication Date: 2021-08-24
JIANGSU JIUZHOU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the vast majority of iron-based wear-resistant and heat-resistant electrode materials have excellent wear resistance, their heat resistance is poor, especially the poor crack resistance, which seriously affects the welding work

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A heat-resistant electrode with excellent crack resistance, the electrode coating is made of the following components in parts by weight: 21 parts of ferrotungsten, 18 parts of ferromolybdenum, 15 parts of medium carbon ferromanganese, 14 parts of ferrosilicon, and 8 parts of ferrovanadium. , 10 parts of fly ash, 6 parts of feldspar, 5 parts of marble, 4.0 parts of boron carbide, 3.2 parts of titanium nitride, 2.8 parts of titanium boride, 1.8 parts of magnesium powder, 1.3 parts of aluminum powder, and 7 parts of graphite;

[0020] The core contains the following elements by mass percentage: Cr: 0.23%, Si: 0.02%, C: 0.04%, Mn: 0.45%, Ni: 0.21%, Zn: 0.15%, Nb: 0.13%, Mo: 0.03%, Ti: 0.02%, Rh: 0.012%, S: 0.002%, P: 0.001%, the balance of iron and inevitable impurities;

[0021] In the preparation of the electrode: the sodium-potassium mixed water glass is used as the binder for the coating. The welding core should be degreasing and rust-removed before use. The electrode ...

Embodiment 2

[0029] A heat-resistant electrode with excellent crack resistance, the electrode coating is made of the following components in parts by weight: 23 parts of ferrotungsten, 19 parts of ferromolybdenum, 16 parts of medium carbon ferromanganese, 15 parts of ferrosilicon, and 9 parts of ferrovanadium , 12 parts of fly ash, 7 parts of feldspar, 6 parts of marble, 4.3 parts of boron carbide, 3.3 parts of titanium nitride, 2.9 parts of titanium boride, 1.9 parts of magnesium powder, 1.4 parts of aluminum powder, and 7.5 parts of graphite;

[0030] The core contains the following elements by mass percentage: Cr: 0.24%, Si: 0.025%, C: 0.05%, Mn: 0.50%, Ni: 0.22%, Zn: 0.18%, Nb: 0.14%, Mo: 0.04%, Ti: 0.03%, Rh: 0.013%, S: 0.003%, P: 0.0015%, the balance of iron and inevitable impurities;

[0031] In the preparation of the electrode: the sodium-potassium mixed water glass is used as the binder for the coating. The welding core should be degreasing and rust-removed before use. The electro...

Embodiment 3

[0040] A heat-resistant electrode with excellent crack resistance, the electrode coating is made of the following components in parts by weight: 25 parts of ferrotungsten, 20 parts of ferromolybdenum, 18 parts of medium carbon ferromanganese, 16 parts of ferrosilicon, and 10 parts of ferrovanadium. , 15 parts of fly ash, 8 parts of feldspar, 7 parts of marble, 5.0 parts of boron carbide, 3.5 parts of titanium nitride, 3.0 parts of titanium boride, 2.0 parts of magnesium powder, 1.5 parts of aluminum powder, and 8 parts of graphite;

[0041] The core contains the following elements by mass percentage: Cr: 0.26%, Si: 0.03%, C: 0.06%, Mn: 0.55%, Ni: 0.24%, Zn: 0.20%, Nb: 0.15%, Mo: 0.05%, Ti: 0.04%, Rh: 0.015%, S: 0.004%, P: 0.002%, the balance of iron and inevitable impurities;

[0042] In the preparation of the electrode: the sodium-potassium mixed water glass is used as the binder for the coating. The welding core should be degreasing and rust-removed before use. The electrode...

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Abstract

The invention relates to the technical field of welding rod research and preparation, and discloses a heat-resistant welding rod with excellent crack resistance. The alloy system selected can significantly improve the crack resistance and heat resistance of the welding rod by using the casting infiltration process, and the thermal conductivity is between 17- 19W / (m K) range, thermal expansion coefficient is 5.5‑6.0×10 ‑6 / °C range, the prepared electrode is easy to start the arc, the arc burns stably, is not easy to break the arc, has good re-starting performance, less spatter, no large particle explosion, easy slag removal, good weld shape, uniform weld seam, and surface Fine scales, stable melting speed, less dust generation and smoke, good adaptability to position welding, less redness of the drug skin, excellent crack resistance, excellent wear resistance and heat resistance, and has a relatively high level of application in engineering applications. High economic benefit.

Description

technical field [0001] The invention belongs to the technical field of research and preparation of welding rods, and particularly relates to a heat-resistant welding rod with excellent crack resistance. Background technique [0002] The welding rod is a metal strip that is melted and filled at the junction of the welding workpiece during gas welding or electric welding. The welding core is the metal core of the electrode. In order to ensure the quality and performance of the weld, there are strict regulations on the content of each metal element in the welding core, especially the content of harmful impurities (such as sulfur, phosphorus, etc.), which should be strictly controlled. The limit is better than that of the base metal. The metal core covered by the coating in the electrode is called the welding core. The core is generally a steel wire with a certain length and diameter. During welding, the welding core has two functions: one is to conduct the welding current an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/365B23K35/40
CPCB23K35/0272B23K35/3073B23K35/365B23K35/404
Inventor 荚爱明丁永贵汪亮亮左洪流
Owner JIANGSU JIUZHOU NEW MATERIAL TECH CO LTD
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