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Laser cladding cobalt-base alloy coating material of continuous casting crystallizer copperplate and process

A continuous casting crystallizer and crystallizer copper plate technology, which is applied in the coating process and coating of metal materials, can solve the problems of reducing the oxidation resistance and wear resistance of the coating, peeling and peeling of the coating, and expensive prices, and achieves remarkable results. Economic and social benefits, good metallurgical bonding, compact structure

Inactive Publication Date: 2010-07-14
QINHUANGDAO SHOUGANG CHANGBAI MOLD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with other technologies, electroplating has the following disadvantages: (1) There is a physical bond between the coating and the substrate rather than a metallurgical bond. Frequent cold and heat fatigue, impact and friction of molten steel and billets often cause The coating peels off; (2) there are defects such as pinholes and acicular porosity formed in the coating process inside the coating, which reduces the oxidation resistance and wear resistance of the coating; (3) the coating has low hardness and poor wear resistance; (4) ) Electroplating belongs to the environmental pollution project of sewage discharge and waste discharge, and it belongs to the national control and phase-out technology
However, the process is slightly complicated, and plasma spraying and high-power CO 2 Laser equipment is bulky, expensive, and has the problem of edge collapse
In addition, the patent "A New Method for Surface Coating of Copper Metal in Continuous Casting Mold" (Patent Publication No. 101294282) invented a method for coating the surface of copper metal in the mold. The pulsed laser beam irradiates the metal surface, but metal flakes and filaments are difficult to process and have the characteristics of difficult operation for large-area cladding, and the problem of cladding sag is not solved

Method used

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  • Laser cladding cobalt-base alloy coating material of continuous casting crystallizer copperplate and process
  • Laser cladding cobalt-base alloy coating material of continuous casting crystallizer copperplate and process
  • Laser cladding cobalt-base alloy coating material of continuous casting crystallizer copperplate and process

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Embodiment 1

[0030] In this embodiment, a pulsed Nd:YAG laser is used to laser clad a multi-layer wear-resistant cobalt-based alloy coating on the copper plate surface of the continuous casting slab mold. The copper plate is a Cr-Zr-Cu alloy, and the thickness of the laser cladding coating is required to be 1.8mm, and there is no obvious defect on the surface after grinding. The specific process is as follows:

[0031] 1. Copper plate surface pretreatment

[0032] Use sandpaper to grind the surface and surroundings of the copper plate of the continuous casting crystallizer to remove oxides and rust, and then clean the surface with acetone to remove rust and oil;

[0033] 2. The outer guard plate is clad to prevent the edge from collapsing

[0034] Copper alloy shields that are flush with the surface to be clad on the surface of the mold copper plate are externally connected to the laser inlet and outlet ends of the mold copper plate and the edge of the mold copper plate.

[0035] The so...

Embodiment 2

[0054] In this embodiment, a pulsed Nd:YAG laser is used to laser clad a multi-layer wear-resistant cobalt-based alloy coating on the copper plate surface of the continuous casting slab mold. The copper plate is Cr-Zr-Cu alloy. One end requires an unprocessed cladding coating thickness of 0.8mm, and one end requires an unprocessed cladding coating thickness of 2.3mm. Concrete technological process is substantially the same as embodiment 1, difference is as follows:

[0055] The ingredients are formulated according to the following alloy components, and the weight percentages of each raw material are: C 1.2%, Cr 30%, W 20%, Mo 5%, Si 1.2%, Fe 1.0%, Ni 9%, Nb 5%, and the balance is Co . All the above-mentioned raw materials are made of metal powder with a particle size of 140-325 mesh, and the prepared raw materials are evenly mixed, and the alloy powder is coated on the surface of the copper plate of the crystallizer by using a binder pre-powder method. Cobalt-based alloy co...

Embodiment 3

[0062] In this embodiment, a single-layer wear-resistant cobalt-based alloy coating is laser cladding on the surface of the copper plate of the continuous casting slab crystallizer by using a pulsed Nd:YAG laser. The copper plate is a Cr-Zr-Cu alloy, and the thickness of the laser cladding coating is required to be 1.8mm, and there is no obvious defect on the surface after grinding. Concrete technological process is substantially the same as embodiment 1, difference is as follows:

[0063] The ingredients are formulated according to the following alloy composition, and the weight percentage of each raw material is: C 1%, Cr 25%, W 18%, Mo 4%, Si 1%, Fe 0.6%, Ni 8%, Nb 5%, and the balance is Co . All the above-mentioned raw materials are made of metal powder with a particle size of 140-325 mesh, and the prepared raw materials are evenly mixed, and the alloy powder is coated on the surface of the copper plate of the crystallizer by using a binder pre-powder method. Cobalt-base...

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Abstract

The invention relates to a laser cladding cobalt-base alloy coating material of a continuous casting crystallizer copperplate and a process, which is characterized in that the cobalt-base alloy coating is a cobalt-base alloy and contains the components by weight percent: 0.6-1.2 percent of C, 20-30 percent of Cr, 13-20 percent of W, 3-5 percent of Mo, 0.8-1.2 percent of Si, 0.4-1.0 percent of Fe, 7-9 percent of Ni, 5 percent of Nb and the balance of Co. The cladding coating has compact tissue and does not have cracks or air holes and forms good metallurgical bonding with the surface of a crystallizer copperplate, and a cladding layer which is 2mm thick or above can be formed. The process can accurately control the thickness of the coating and realize automatic control on the whole process and has the advantages of low energy consumption, no pollution, high efficiency and low cost. Consequently, the invention can improve the disadvantages of the original crystallizer coating technology and has obvious economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of material science and surface engineering, and in particular relates to a cobalt-based alloy coating material and process for laser cladding of a continuous casting crystallizer copper plate. Background technique [0002] The crystallizer is a water-cooled steel ingot mold, which is a very important part of the continuous casting machine, called the "heart" of the continuous casting equipment. Its function is to continuously condense high-temperature molten steel in the crystallizer to a billet of specified size and geometry, and pull it out smoothly at a certain speed, and its technical performance will directly affect the internal structure of the ingot, the surface quality of the billet, and the continuous Casting machine casting speed and production efficiency and other indicators. [0003] During the working process, the copper plate of the crystallizer suffers from severe friction and wear due to th...

Claims

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Application Information

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IPC IPC(8): C22C19/07C23C24/10C22F1/08B22D11/057B22D11/059
Inventor 王爱华闫华叶天军隋大鹏
Owner QINHUANGDAO SHOUGANG CHANGBAI MOLD
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