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High-hardness cobalt-based alloy powder for laser cladding and preparation technology of high-hardness cobalt-based alloy powder for laser cladding

A cobalt-based alloy, laser cladding technology, applied in the field of metal surface hardening treatment, can solve problems such as cracking, poor self-fluxing, and porosity

Inactive Publication Date: 2014-12-10
浙江瑞莱士机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cobalt-based alloy cladding layer should maintain a relatively high hardness, so problems such as cracking, oxidation, pores, and poor self-fluxing are prone to occur during cladding.

Method used

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  • High-hardness cobalt-based alloy powder for laser cladding and preparation technology of high-hardness cobalt-based alloy powder for laser cladding
  • High-hardness cobalt-based alloy powder for laser cladding and preparation technology of high-hardness cobalt-based alloy powder for laser cladding
  • High-hardness cobalt-based alloy powder for laser cladding and preparation technology of high-hardness cobalt-based alloy powder for laser cladding

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Test material: the base material is ASTMA182F304.

[0017] 2. Laser cladding materials:

[0018] The composition is (by weight): C: 1.2%; Cr: 28%; Fe: 3%; Mn: 0.04%; Mo: 1%; Ni: 3%; Si: 0.7%; W: 3.5%; Co.

[0019] 3. Melt the prepared ingredients, and the smelting is carried out under the condition of vacuum degree of 1Pa.

[0020] The temperature is 1800°C, and the melting mass of each furnace is 50KG. The smelted ingredients are subjected to slagging and deoxidation treatment, and then the ingredients are made into powder by the atomization pulverization method. In this process, nitrogen is used as the atomization medium, atomized for 5 minutes under 8Pa atmospheric pressure, and then in the absence of oxygen or Cooling is carried out in a low-oxygen state, and finally sieved to obtain high-hardness cobalt-based alloy powder.

[0021] 4. The laser cladding process adopts a laser cladding machine with a power of 3km and a speed of 5mm / s.

[0022] The diameter o...

Embodiment 2

[0032] 1. Test material: the base material is ASTMA182F304.

[0033] 2. Laser cladding materials:

[0034] The composition is (by weight): C: 1.55%; Cr: 31%; Fe: 3%; Mn: 0.05%; Mo: 2%; Ni: 4%; Si: 1.5%; W: 6.5%; Co.

[0035] 3. Smelting the prepared ingredients, the smelting is carried out under the condition of vacuum degree of 10Pa, the temperature is 2700°C, and the melting mass of each furnace is 50KG. The smelted ingredients are subjected to slagging and deoxidation treatment, and then the ingredients are made into powder by the atomization pulverization method. In this process, nitrogen is used as the atomization medium, atomized for 8 minutes under 10Pa atmospheric pressure, and then the powder is sprayed in an oxygen-free or Cooling is carried out in a low-oxygen state, and finally sieved to obtain high-hardness cobalt-based alloy powder.

[0036] 4. Laser cladding process, using a laser cladding machine, the power is 4km, the speed is 10mm / s, the spot diameter is 6...

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Abstract

The invention relates to the technical field of metal surface hardening treatment and in particular relates to high-hardness cobalt-based alloy powder for laser cladding and a preparation technology of the high-hardness cobalt-based alloy powder for laser cladding. According to the technical scheme, the high-hardness cobalt-based alloy powder for the laser cladding is prepared from the following components in percentage by weight: 1.2-1.55% of C, 28-31% of Cr, less than or equal to 3% of Fe, less than or equal to 0.5% of Mn, less than or equal to 1% of Mo, less than or equal to 3% of Ni, 0.7-1.5% of Si, 3.5-6.5% of W and the balance of Co. The preparation technology of the high-hardness cobalt-based alloy powder for the laser cladding comprises the following steps: a, preparing the components, and smelting; b, slagging and deoxidizing the smelted components obtained in the step a; c, preparing the components obtained in the step b into powder; d, collecting the powdery components obtained in the step c; and e, sieving the cooled powdery components obtained in the step d. By adopting the technical scheme, the high-hardness cobalt-based alloy powder, which hardly cracks, is hardly oxidized, is extremely low in porosity, has good self fluxing performance, is used for the laser cladding, and a preparation technology of the high-hardness cobalt-based alloy powder are provided.

Description

technical field [0001] The invention relates to the technical field of metal surface hardening treatment, in particular to a high-hardness cobalt-based alloy powder for laser cladding and a preparation process thereof. Background technique [0002] Cobalt-based alloys are generally used in corrosion-resistant, high-temperature and oxidation-resistant environments. However, due to the high production cost of cobalt, choosing cobalt-based alloys as the overall material will lead to high prices for valves and other products. In order to retain the corrosion resistance of cobalt-based alloys, high temperature oxidation resistance and high hardness (wear resistance), reduce the market competitiveness of parts. The laser cladding process is used to remelt the cobalt-based alloy on the metal surface, so that the metal surface is hardened, so that it has the wear resistance, high temperature oxidation resistance and corrosion resistance of the cobalt-based alloy. In addition, in or...

Claims

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Application Information

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IPC IPC(8): C23C24/10B22F1/00C22C19/07B22F9/08
Inventor 姜慧张崇海
Owner 浙江瑞莱士机械有限公司
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