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A hardfacing alloy material

A technology of alloy material and hard surface, applied in the direction of welding/cutting medium/material, welding equipment, welding medium, etc., can solve the problems of insufficient economy, high content of precious metal elements, increased cost, etc., to reduce pollution and improve weldability And good impact resistance, hardness and wear resistance

Active Publication Date: 2019-05-31
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the designed alloy powder still uses chromium carbide as the main hard phase.
And the content of adding precious metal elements is more, which increases the cost and is not economical

Method used

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  • A hardfacing alloy material
  • A hardfacing alloy material
  • A hardfacing alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The mass percentages of the constituent elements of the hardfacing alloy material in this embodiment are: Nb: 1.0Wt%, Ni: 1.0Wt%, C: 0.5Wt%, Si: 0.5Wt%, Mn: 1.5Wt%, Cr: 3.0Wt %, Mo: 2.0Wt%, W+V+Ti: 2.5Wt% (W: 1.0Wt%, V: 1.0Wt%, Ti: 0.5Wt%), and the balance is Fe.

[0045] The raw material composition (by mass percentage) used in the alloy material of this embodiment is: 0.8% of medium carbon ferromanganese, 4.4% of high carbon ferrochrome, 0.4% of ferrosilicon, 3.2% of ferromolybdenum, 1.0% of vanadium iron, 2.0% of tungsten iron , ferro-titanium 0.2%, high-carbon ferromanganese 1.0%, reduced iron powder 85%, niobium powder 1.0%, nickel powder 1.0%. Among them, the purity of nickel powder and niobium powder is ≥0.99, and other raw materials are used according to market standards.

[0046] Use the alloy material of this example to carry out surface overlay welding on the base material 42CrMo steel (see the following table 1 for the chemical composition) by TIG cladding,...

Embodiment 2-6

[0053] The elemental composition and welding method of the alloy materials in Examples 2-6 are the same as those in Example 1, except that the contents of nickel and niobium elements are changed.

Embodiment 7

[0078] The mass percent composition of each element of the hardfacing alloy material in this embodiment is: Nb: 2.0Wt%, Ni: 1.5Wt%, C: 0.4Wt%, Si: 0.3Wt%, Mn: 1.2Wt%, Cr: 3.5Wt%, Mo: 1.8Wt%, W+V+Ti: 2.2Wt%, the balance is Fe.

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Abstract

The invention relates to a hardfacing alloy material. The hardfacing alloy material is characterized by comprising the following component elements in percentage by mass: 1.0-2.5Wt% of Nb, 0-2.0Wt% of Ni, 0.3-0.5Wt% of C, 0.2-0.5Wt% of Si, 1.0-1.5Wt% of Mn, 3.0-4.0Wt% of Cr, 1.5-2.0Wt% of Mo, 2.0-2.5Wt% of W+V+Ti, and the balance of Fe. An appropriate amount of Ni and Nb are added in the hardfacing alloy material, a finer MC type carbide can be obtained as a hard surface layer of a main hard phase when the hardfacing alloy material is used in welding, the generation amount of relatively thick and big M23C6 is effectively reduced at the same time, a martensitic matrix with strong toughness is used as a support for the hard phase MC carbide, and a hard surface layer composed of the strong-toughness martensitic matrix and the dispersively-distributed fine MC type carbide as the main hard phase is finally obtained. On the premise of improving the hardness of the hard surface layer, good crack resistance and wear resistance of the hardfacing alloy material are ensured, and strong-toughness matching of the hard surface layer is effectively improved.

Description

technical field [0001] The invention relates to a hard surface surfacing alloy material. When the surfacing alloy material is used for welding, a hard surface layer with MC type carbide as the main hard phase can be formed. It is used for surfacing welding to manufacture a hard surface layer so that the surface of the substrate can obtain high hardness, high wear resistance and excellent corrosion resistance. With excellent performance and high temperature resistance, the surfacing alloy material can be used in the surface repair of workpieces and the development of solid core and flux cored wires. Background technique [0002] Judging from the current research status of high-hardness surfacing materials at home and abroad, high-hardness and wear-resistant alloys are mostly high-chromium cast iron alloys, because the hard surface layer contains a large amount of eutectic carbide M 7 C 3 , M 23 C 6 Thus, high hardness can be obtained. However, its toughness is very poor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K9/167B23K35/12
CPCB23K9/167B23K35/0266B23K35/3053
Inventor 陈翠欣赵向东薛海涛刘宝玺
Owner HEBEI UNIV OF TECH
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