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Abrasive wear resistant weld deposit flux-cored wire

A technology of abrasive wear and flux, applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of uneven composition and difficulty in ensuring the quality of flux cored wire, so as to improve the deposition speed and facilitate production Operation, heat reduction effect

Inactive Publication Date: 2009-04-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the disadvantages and deficiencies of the existing surfacing flux-cored wire powder using mechanical mixing process, it is easy to cause uneven composition, it is difficult to guarantee the quality of the flux-cored wire, and the high-quality self-produced scrap steel (low impurity content, containing beneficial alloy elements) of iron and steel enterprises Development and utilization problems, the present invention proposes an anti-abrasive wear surfacing flux-cored welding wire and its production method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1: Use scrap steel and ferroalloy to produce alloy powder, use the alloy powder to manufacture a 2.4mm diameter anti-abrasive wear surfacing flux-cored welding wire, the hardness of the single-layer surfacing metal is required to be above HRC50.

[0052] The surfacing metal adopts Fe-Cr-C-B-V alloy system, and the content (mass%) of the main alloying elements in the flux-cored welding wire deposit metal is 2.0-2.5% C, 12-18% Cr, 1.0-1.3% V, 0.6-0.8% b.

[0053] The preparation method of anti-abrasive wear surfacing flux-cored welding wire includes two steps of preparing alloy powder and manufacturing flux-cored welding wire, and the steps are as follows:

[0054] (1) Selection of scrap steel: Q345 scrap steel is selected according to the design requirements of wear-resistant alloy composition, and its main chemical composition (mass%) is: 0.18%C, 1.42%Mn, 0.36%Si, 0.017%S, 0.015%P.

[0055] (2) According to the design index of the content of the main alloy elem...

Embodiment 2

[0062] Example 2: The deposited metal contains a composite hard phase anti-abrasive wear surfacing flux-cored wire.

[0063] The surfacing metal adopts the alloy system based on Fe-Cr-C, adding various alloy elements to form carbide composite hard phase in the surfacing metal. The content (mass%) of the main alloying elements in the flux-cored wire deposited metal is 3.2-3.8% C, 1.4-1.8% Mn, 1.6-2.1% Si, 8.5-10.0% Cr, 1.4-1.8% V, 0.5-0.7% B. 2.0-2.4% W, 1.0-1.2% Mo. Among them, Si and Mn are in CO 2 It mainly plays the role of deoxidation during gas shielded welding.

[0064] The preparation method of flux-cored welding wire for surfacing welding includes two steps of preparing alloy powder and manufacturing flux-cored welding wire, and the steps are as follows:

[0065] (1) Selection of scrap steel: select the plate edge of low-carbon microalloy steel with tensile strength 610MPa grade, and its chemical composition is (mass%): 0.09%C, 1.47%Mn, 0.22%Si, 0.26%Ni, 0.18%Mo , ...

Embodiment 3

[0074] Example 3: The deposited metal contains a composite hard phase anti-abrasive wear surfacing flux-cored wire.

[0075] The surfacing metal adopts an alloy system based on Fe-Cr-C, and various alloy elements are added to form a variety of carbides, nitrides, and carbonitride composite hard phases in the surfacing metal. The content (mass%) of the main alloying elements in the flux-cored wire deposited metal is 2.2-2.7% C, 1.2-1.4% Mn, 1.0-1.2% Si, 9.5-11.5% Cr, 1.5-1.8% V, 2.1-2.5% W, 0.9-1.2% Mo, 0.07-0.12% N. Among them, Si and Mn are in CO 2 It mainly plays the role of deoxidation during gas shielded welding.

[0076] The preparation method of anti-abrasive wear surfacing flux-cored welding wire includes two steps of preparing alloy powder and manufacturing flux-cored welding wire, and the steps are as follows:

[0077] (1) Selection of scrap steel: choose 10CrMo910 scrap steel (ie ), its main chemical composition (mass%) is: 0.12%C, 0.52%Mn, 0.40%Si, 2.2%Cr, 1.0%...

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Abstract

The invention discloses an overlaying welding agent core welding wire with abrasive wear resistance. A steel strip is wrapped with alloy powder and is subjected to drawing path by path and diameter reduction through a wire-drawing die to form the overlaying welding agent core welding wire, wherein the diameter of the overlaying welding agent core welding wire is between 2.4 and 3.2 mm; the length of the overlaying welding agent core welding wire is freely set; the steel strip is one of an SPCC steel strip, a 08A steel strip and a 08Al steel strip with width of between 18 and 22 mm and thickness of 0.45 and 0.6 mm; and the aluminum alloy powder is manufactured from waste steel and an alloying agent. The overlaying welding agent core welding wire is designed according to the composition requirement of overlaying welding metal; and compositions are fully homogenized in the smelting process of pulverization, thereby overcoming the disadvantages that the prior medicine powder for producing the overlaying welding agent core welding wire adopts a mechanical mixing process to easily cause unevenness of the compositions. The overlaying welding agent core welding wire uses the waste steel as one of raw materials of the overlaying welding agent core welding wire with abrasive wear resistance, fully utilizes contained alloy elements, improves the utilization rate of the alloy elements, reduces the cost for the overlaying welding agent core welding wire and achieves the aims of energy conversation and emission reduction.

Description

technical field [0001] The invention relates to a welding material, in particular to an anti-abrasive wear-resistant surfacing flux-cored welding wire and a preparation method thereof. Background technique [0002] At present, the best solution to improve the wear resistance of components and prolong their service life is to prepare a wear-resistant layer on the surface of core parts that are cheap and have good toughness and plasticity. Surfacing, thermal spraying, vapor deposition, electroplating and other technologies are common methods for preparing wear-resistant layers. Surfacing welding is widely used because of its simple process, low equipment investment, flexible operation and wide adaptability. Since the composition of flux-cored wire is quite convenient to adjust, the use of flux-cored wire for surfacing has become the most common process. [0003] Flux-cored wire consists of a thin-walled steel tube filled with mixed powder. The manufacturing process for flux...

Claims

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Application Information

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IPC IPC(8): B23K35/22B22F9/08
Inventor 孙俊生支开印王永范存超
Owner SHANDONG UNIV
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