Laser cladding Co-based alloy powder for conductor roll

A cobalt-based alloy, laser cladding technology, applied in the field of material science, can solve the problems of difficult machining, different melting points, unstable performance, etc., and achieve the effect of improving the quality of grain boundaries, good comprehensive performance, and reducing the melting point of the alloy

Inactive Publication Date: 2008-05-28
SHENYANG DALU LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] These mixed powders have problems such as uneven mixing, large particle size differences, different melting points, component deviations, and different expansion coefficients, which lead to defects such as cracks, pores, segregation, unstable performance, and difficulty in machining in actual cladding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A cobalt-based alloy powder for laser cladding conductive rollers, its chemical composition contains: Co, Cr, W, Mo, Ni, Fe, Si, Mn, V, B, C elements, and an appropriate amount of rare earth in the alloy composition Element Y 2 o 3 , Ce and La 2 o 3 , its chemical composition by weight percentage is: Cr: 25%; W: 7%; Mo: 4%; Ni: 7%; Fe: 5%; Mn: 1%; Si: 0.5%; V: 0.2%; B : 0.8%; C: 1.2%; Y 2 o 3 : 0.5%; La 2 o 3 : 0.5%; Ce: 0.5%; the balance is Co.

[0017] Its preparation method comprises the following processes:

[0018] 1. Metal Co, Cr, W, Mo, Ni, Fe, Si, Mn, V, B, C and rare earth element Y 2 o 3 , La 2 o 3 , Ce is prepared 50kg by above-mentioned weight percentage, is ready to make the raw material of metal powder.

[0019] 2. Start the intermediate frequency, according to the requirements of the smelting process, put in the metal to start smelting, and generally put in the metal that is easy to oxidize in the later stage of melting. The melting temperat...

Embodiment 2

[0028] A cobalt-based alloy powder for laser cladding conductive rollers, its chemical composition contains: Co, Cr, W, Mo, Ni, Fe, Si, Mn, V, B, C elements, and an appropriate amount of rare earth in the alloy composition Element Y 2 o 3 , Ce, and Hf, its chemical composition by weight percentage is: Cr: 27%; W: 8%; Mo: 5%; Ni: 9%; Fe: 7%; Mn: 1.2%; Si: 1%; V : 0.4%; B: 1.2%; C: 2%; Y 2 o 3 : 0.5%; Ce: 0.5%; Hf: 0.5%, the balance being Co.

[0029] Its preparation method is identical with embodiment one.

Embodiment 3

[0031] A cobalt-based alloy powder for laser cladding conductive rollers, its chemical composition contains: Co, Cr, W, Mo, Ni, Fe, Si, Mn, V, B, C elements, and an appropriate amount of rare earth in the alloy composition Elements Ce, Hf and La 2 o 3 , its chemical composition by weight percentage is: Cr: 29%; W: 9%; Mo: 5%; Ni: 11%; Fe: 9%; Mn: 1.5%; Si: 1.5%; V: 0.5%; B : 1.5%; C: 2.4%; Ce: 0.5%; La 2 o 3 : 0.5%; Hf: 0.5%, the balance is Co.

[0032] Its preparation method is identical with embodiment one.

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Abstract

Provided is cobalt-based alloy powder for laser cladding electricity conducting roller, the weight percentages of the chemical components of the material are that Cr is 24-30%, W is 6-10%, Mo is 3-6%, Ni takes 6-12%, Fe holds 2-10%, Mn is 0.5-2%, Si holds 0.2-2%, V is 0.1-0.6%, B takes 0.3-1.5%, C holds 0.5-2.5%, Y2O3 is 0-0.5%, Hf takes 0-0.5%, La2O3 holds 0-0.5%, Ce is 0-0.5%, and the rest is Co. The invention has the advantages that with multiple strengthened methods, the alloy substrate is strengthened and the crystal boundary quality is improved, which enables the alloy to achieve perfect combination property, thereby achieving medium rigidity and relatively high intensity of the alloy, simultaneously forming self-fluxing alloy and reducing alloy melting point, and increasing properties of oxidation resistance, abrasion resistance, corrosion resistance, and certain electricity conduction.

Description

technical field [0001] The invention relates to material science, and provides a cobalt-based alloy powder for laser cladding conductive rollers with medium hardness, excellent oxidation resistance, corrosion resistance, abrasion resistance, superior cladding performance, and convenient machining after cladding. Background technique [0002] As an advanced remanufacturing technology, laser cladding has been rapidly promoted and widely used with the continuous improvement of laser power and stability. Laser cladding is an advanced remanufacturing technology that obtains a high-performance surface coating that is firmly bonded to the substrate on the metal surface without pores, cracks and other defects. It can clad high-melting point alloy materials on the surface of low-melting point substrates , High-performance surface coatings can also be prepared on low-cost substrates to replace a large number of advanced, high-performance overall materials, save precious metals, and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 陈江陈常义
Owner SHENYANG DALU LASER TECH
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