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Surfacing electrode and application thereof

A surfacing welding electrode and welding core technology, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of poor hardness and wear resistance of the hammer body, and achieve high hardness and wear resistance, high temperature resistance Good abrasiveness and slow cooling rate

Inactive Publication Date: 2005-02-23
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of the existing sintered single-roller crusher hammer surfacing electrode with coating and poor hardness and wear resistance of the hammer body after surfacing, the technical problem to be solved by the present invention is to provide a kind of hammer head metal It has high wear resistance and good toughness, and the life of the hammer head is longer. It is not easy to produce cold cracks during surfacing welding. There is no need to clean up the welding slag during the welding process. The next weld can be welded as soon as the previous weld is solidified. During surfacing welding, the interlayer temperature is easy to keep high, the welding quality is better, and the welding electrode without coating (ie welding rod) has higher welding production efficiency.

Method used

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Examples

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Effect test

Embodiment 1

[0026] Use ordinary sand to make a casting cavity with a diameter of Φ13mm×300mm, paint the cavity with ordinary paint, and dry it. Medium frequency induction furnace smelting molten iron, its composition (weight percentage) is C: 5.1%, Si: 1.2%, Mn: 1.6%, Cr: 23%, Nb: 0.35%, S≤0.05%, P≤0.05%, 0≤ 0.01%, N≤0.01%, the rest is Fe. Then pouring, after the molten iron is cooled to room temperature in the cavity, it will be made into welding rods, and the sand on the surface of the welding rods will be cleaned before use. The average hardness value of the surfacing metal surface of the electrode is HRC≥57.5.

Embodiment 2

[0028] Use ordinary sand to make a casting cavity of Φ13mm×300mm, paint the cavity with ordinary paint, and dry it. Medium frequency induction furnace smelting molten iron, its composition (weight percentage) is C: 5.3%, Si: 1.2%, Mn: 1.9%, Cr: 22%, Nb: 0.30%, Cu: 0.12%, S≤0.05%, P≤ 0.05%, 0≤0.01%, N≤0.01%, and the rest is Fe. Then pouring, after the molten iron is cooled to room temperature in the cavity, it will be made into welding rods, and the sand on the surface of the welding rods will be cleaned before use. The average hardness value of the surfacing metal surface of the electrode is HRC≥58.5.

Embodiment 3

[0030] Use ordinary sand to make a casting cavity of Φ13mm×300mm, paint the cavity with ordinary paint, and dry it. Medium frequency induction furnace smelting molten iron, its composition (weight percentage) is C: 3.2%, Si: 0.4%, Mn: 0.4%, Cr: 10%, Nb: 0.01%, S≤0.02%, P≤0.05%, 0≤ 0.0l%, N≤0.01%, and the rest is Fe. Then pouring, after the molten iron is cooled to room temperature in the cavity, it will be made into welding rods, and the sand on the surface of the welding rods will be cleaned before use. The average hardness value of the surfacing metal surface of the electrode is HRC≥50.

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PUM

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Abstract

A welding electrode for build-up welding of hammer contains C (3.2-6.5 wt.%), Si (0.4-2.5), Mn (0.4-2.0), Cr (10-35) and Nb (0.01-1.50). The welded hammer has high hardness, toughness and antiwear nature, fine crystal grins and long service life.

Description

Technical field [0001] The invention relates to an electrode and its application, in particular to a surfacing welding electrode and its application. Background technique [0002] The sintering machine is mainly used in the iron and steel metallurgical industry. Its function is to obtain sintered ore through sintering. It is the previous process of blast furnace ironmaking. After sintering, the sintered ore falling from the tail of the sintering machine must be crushed and screened to make the ore have a uniform particle size before entering the blast furnace for smelting. The sintered ore crushed in my country adopts a primary crushing process, and the equipment used is a single-roller crusher. The crushed sinter must be screened to remove the oversized or undersized sintered ore outside the required particle size range, among which the undersized ore is re-sintered, while the oversized ore is re-broken. The single-roll crusher is composed of a star wheel, a shaft roller, a...

Claims

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Application Information

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IPC IPC(8): B23K35/24
Inventor 林剑东
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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