High-hardness self-protecting cold roll build-up welding flux-cored wire

A cold roll, self-protection technology, applied in the field of high-hardness self-protected cold roll surfacing flux-cored welding wire, can solve the problems of increasing labor intensity of workers, reducing production efficiency, low hardness, etc.

Inactive Publication Date: 2011-05-11
BEIJING SURYEE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The cold roll surfacing repair materials used today have low hardness (HRC 45-52), and the welding method used is submerged arc surfacing. This method requires a large amount of

Method used

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  • High-hardness self-protecting cold roll build-up welding flux-cored wire
  • High-hardness self-protecting cold roll build-up welding flux-cored wire

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] All welding wires in the examples are produced by the existing mature flux-cored wire forming machine:

[0024] 1. Select 10×0.3 (width 10mm, thickness 0.3mm) H08A cold-rolled steel strip. Roll it into a U shape first. Take 25 grams of high-carbon ferrochromium, 15 grams of metal chromium, 8 grams of ferromolybdenum, 10 grams of metal manganese, 8 grams of 75# ferrosilicon, 10 grams of aluminum-magnesium alloy, 12 grams of ferro-niobium, 4 grams of ferro-tungsten, and 4 grams of nickel powder , 4 grams of iron powder. (The particle size of the powder taken is that it can pass through a 40-mesh sieve). The various powders taken are put into a powder mixer and mixed for 10 minutes, and then the mixed powder is added into a U-shaped H08A cold-rolled steel strip groove, and the filling rate is 20%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through drawing dies with diameters of 3.4mm, 3.15mm, 2.95mm, 2.8mm, 2.6mm, and 2.4mm, draw a...

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Abstract

The invention discloses a high-hardness self-protecting cold roll build-up welding flux-cored wire, and belongs to the field of welding in material processing. The flux-cored wire is mainly applied to build-up welding repair of cold rolls of steel mills. The flux-cored wire is characterized in that: the outer surface of the powder cored wire is an H08A cold rolling steel strip; and the powder of the powder cored wire comprises the following components in percentage by mass: 25 to 45 percent of high carbon ferrochrome, 5 to 15 percent of chromium metal, 4 to 8 percent of ferromolybdenum, 5 to 10 percent of manganese metal, 4 to 8 percent of No.75 silicon iron, 4 to 10 percent of aluminum magnesium alloy, 6 to 12 percent of ferrocolumbium, 4 to 10 percent of ferrotungsten, 4 to 12 percent of nickel powder and 4 to 18 percent of iron powder. A coating prepared by build-up welding has high hardness (Rockwell hardness (HRC): 55 to 60) and excellent abrasion resistance; and a self-protecting build-up welding mode is adopted, namely a protective gas source and a flux are not needed in the build-up welding process, and slag knocking is not needed in the build-up welding process, so automatic production is easy to realize.

Description

technical field [0001] The invention discloses a high-hardness self-protecting cold roll surfacing flux-cored welding wire, which belongs to the field of welding in material processing. The invention is mainly applied to the surfacing repair of cold rolling rolls in steel mills. Background technique [0002] Rolls are the most important processing tools in the metallurgical industry. In the production of plates and strips, cold rolls not only have to withstand high wear during normal rolling production, but also can withstand local stress overload without damage when the rolling mill fails. The quality of cold rolls directly affects the quality of steel plates and strips. material surface quality. [0003] Overlay welding technology is a technology that uses welding technology to deposit wear-resistant alloys on the surface of workpieces. It is one of the important technical means to improve the service life of rolls in the metallurgical industry by using surfacing welding...

Claims

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Application Information

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IPC IPC(8): B23K35/24B23K35/40
Inventor 胡为峰葛爽
Owner BEIJING SURYEE SCI & TECH
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