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Plunger repairing surfacing flux-cored wire suitable for sintered welding flux

A welding flux and welding wire technology, applied in the field of surfacing flux-cored welding wire for plunger repair, can solve the problems of pollution by electroplating, poor corrosion resistance and wear resistance, and high cost, and achieve good corrosion resistance and wear resistance. , The effect of high cladding efficiency and low cost

Active Publication Date: 2018-11-30
FARINA JINAN WELDTEC & MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the repair methods of plunger mainly include electrochrome plating method, oxygen-acetylene flame alloy powder spraying / spray welding method and laser fusion welding method. Among these methods, electrochrome plating method is seriously polluted and does not meet environmental protection requirements; The spraying / spray welding method melts the base metal and alloy by flame, and the penetration depth is relatively shallow, and the penetration depth generally does not exceed 1.5mm. The fusion effect is not good and the wear resistance is poor; the laser fusion welding method has high cost and low efficiency.
Therefore, as an economical and rapid process for surface modification of materials, surfacing welding is more and more widely used in the repair of plungers. The impact is very important, but the corrosion resistance and wear resistance of the existing surfacing flux cored wire are poor, and the effect of cooperating with sintered flux is poor, and the welding depth is shallow
[0003] The patent application titled "Precipitation Hardening Stainless Steel Flux-Cored Wire for Submerged Arc Overlay Welding of Continuous Casting Roller and Its Preparation Method" and the publication number CN108015447A discloses a flux-cored wire, but its coordination effect with sintered flux is poor. Shallow cauterization in plunger repairs, unsatisfactory performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A surfacing flux-cored welding wire suitable for sintered flux for plunger repair, which is composed of steel strip and powder. The filling rate is added with powder, then rolled into an O shape, and finally cold drawn through a mold to a suitable diameter.

[0011] Wherein the mass percent of each component of the above-mentioned added medicine powder is: high-carbon ferrochrome 10%, high-carbon ferromanganese 12%, micro-carbon ferrochrome 60%, rare earth silicon 3%, alumina 1%, vanadium iron, tungsten iron, Molybdenum iron, nickel powder alloy 14%; the preferred powder filling rate of this embodiment is 40%.

[0012] The welding wire prepared in this example is used with sintered flux, such as SJ102 flux. The welding wire is pollution-free, has a penetration depth of about 2.9-3.5 mm, high deposition efficiency, and can be continuously multi-layered. Nickel powder, molybdenum iron, vanadium iron, and tungsten iron are added to the deposited metal to enhance the corro...

Embodiment 2

[0014] The difference from Example 1 is that the mass percent of each component in the medicated powder is: 10% of high-carbon ferrochrome, 12% of high-carbon ferromanganese, 60% of micro-carbon ferrochrome, 2% of rare earth silicon, 1% of aluminum oxide, Vanadium iron, nickel powder alloy 15%; drug powder filling rate 35%. The welding wire prepared in this embodiment has a penetration depth of about 2.7-3mm.

Embodiment 3

[0016] The difference from Example 1 is that the mass percent of each component in the medicated powder is: 15% of high-carbon ferrochrome, 15% of high-carbon ferromanganese, 55% of micro-carbon ferrochrome, 1% of rare earth silicon, 1% of aluminum oxide, Nickel powder 13%; medicine powder filling rate 37%. The welding wire prepared in this embodiment has a penetration depth of about 2.5-2.8mm.

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Abstract

The invention belongs to the technical field of welding materials, and particularly relates to a plunger repairing surfacing flux-cored wire suitable for sintered welding flux. The plunger repairing surfacing flux-cored wire is composed of a steel belt and powder. An SPCC cold-rolled carbon steel belt is adopted as the steel belt, and the filling rate of the powder is 35%-40%. The powder comprisescomponents including, by mass percent, 10%-15% of high carbon ferro chrome, 10%-15% of high carbon ferromanganese, 55%-60% of micro-carbon ferro chrome, 1%-3% of rare earth silicon and 0.5%-1% of aluminum oxide and 8%-15% of one or more of ferrovanadium, ferrotungsten, ferromolybdenum and nickel powder.

Description

(1) Technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a surfacing flux-cored welding wire suitable for sintering type flux for repairing a plunger. (2) Background technology [0002] At present, the repair methods of plunger mainly include electrochrome plating method, oxygen-acetylene flame alloy powder spraying / spray welding method and laser fusion welding method. Among these methods, electrochrome plating method is seriously polluted and does not meet environmental protection requirements; The spraying / spray welding method melts the base metal and alloy by flame, and the penetration depth is shallow, and the penetration depth generally does not exceed 1.5mm. The fusion effect is not good and the wear resistance is poor; the laser fusion welding method has high cost and low efficiency. Therefore, as an economical and rapid process for surface modification of materials, surfacing welding is more and more w...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/12
CPCB23K35/0266B23K35/308
Inventor 李长鑫张宗辉
Owner FARINA JINAN WELDTEC & MACHINERY
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