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Cr-Ni stainless steel hot cladding surface reinforcement method

A technology of surface strengthening and stainless steel, applied in the direction of metal material coating process, coating, etc., can solve the problem of high cost of laser surface quenching and surface surfacing welding materials, difficult processing of surface thermal spraying pretreatment coating, and poor plasma cladding process. Good control and other issues, to achieve the effect of high coating performance, easy processing parameters, and dense surface strengthening points

Inactive Publication Date: 2012-09-19
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of laser surface quenching and surfacing welding materials is high; the surface thermal spraying pretreatment coating is difficult to process, the coating is poorly bonded to the substrate, and the coating is prone to fatigue and peeling off; the plasma cladding process is not easy to control, and the production cost is high. From the point of view of the

Method used

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  • Cr-Ni stainless steel hot cladding surface reinforcement method
  • Cr-Ni stainless steel hot cladding surface reinforcement method
  • Cr-Ni stainless steel hot cladding surface reinforcement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: 0Cr13Ni5Mo stainless steel is used as the object of cladding treatment, and WC is selected as ceramic cemented carbide as an example. The specific process is as follows:

[0033] (1) Workpiece pretreatment: Before thermal cladding, the surface of 0Cr13Ni5Mo stainless steel workpiece is pretreated: cleaning the surface of the workpiece, removing oil, scale, etc.

[0034] (2) WC carbide electrode is used as anode, 0Cr13Ni5Mo stainless steel workpiece is used as cathode, and thermal cladding treatment is carried out. The thermal cladding gun adopts self-rotating mode, the speed is 2000r / min, and the electrode is mechanically clamped;

[0035] (3) Under the protection of inert gas argon, use thermal cladding equipment for cladding treatment, and the flow rate of argon is controlled at 5.5L / min;

[0036](4) Thermal cladding process parameters are: output power 4000W, output voltage 180V, discharge frequency 1000HZ, cladding time 1min / cm 2 . The coating can reac...

Embodiment 2

[0039] Example 2: 0Cr13Ni4Mo stainless steel is used as the object of cladding treatment, and WC is selected as ceramic cemented carbide as an example. The specific process is as follows:

[0040] (1) Workpiece pretreatment: Before thermal cladding, the surface of 0Cr13Ni4Mo stainless steel workpiece is pretreated: cleaning the surface of the workpiece, removing oil, scale, etc.

[0041] (2) Use WC cemented carbide electrode as anode and 0Cr13Ni4Mo stainless steel workpiece as cathode for thermal cladding treatment. The thermal cladding gun adopts self-rotating mode with a speed of 2200 r / min, and the electrode is mechanically clamped;

[0042] (3) Under the protection of inert gas argon, use thermal cladding equipment for cladding treatment, and the flow rate of argon is controlled at 6.0L / min;

[0043] (4) Thermal cladding process parameters are: output power 5000W, output voltage 220V, discharge frequency 1500HZ, cladding time 1.3min / cm 2 . The coating can reach 45μm, th...

Embodiment 3

[0044] Example 3: 1Cr18Ni9Ti stainless steel is used as the object of cladding treatment, and WC is selected as ceramic hard alloy as an example. The specific process is as follows:

[0045] (1) Workpiece pretreatment: Before thermal cladding, the surface of 1Cr18Ni9Ti stainless steel workpiece is pretreated: cleaning the surface of the workpiece, removing oil, scale, etc.

[0046] (2) Use WC cemented carbide electrode as anode and 1Cr18Ni9Ti stainless steel workpiece as cathode for thermal cladding treatment. The thermal cladding gun adopts self-rotating mode with a speed of 2500r / min, and the electrode is mechanically clamped;

[0047] (3) Under the protection of inert gas argon, use thermal cladding equipment for cladding treatment, and the flow rate of argon is controlled at 6.5L / min;

[0048] (4) Thermal cladding process parameters are: output power 6000W, output voltage 260V, discharge frequency 2400HZ, cladding time 2min / cm 2 . The coating can reach 50μm, the coating...

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Abstract

The invention discloses a Cr-Ni stainless steel hot cladding surface reinforcement method which comprises the following steps: (1) before hot cladding, the surface of a workpiece is pretreated; (2) a ceramic hard alloy electrode is used for hot cladding treatment, a self-rotating hot cladding gun is adopted, the rotational speed ranges from 2000 to 2500 r / min, and a mechanical clamping electrode is adopted; and (3) under the protection of argon gas which is inert gas, hot cladding equipment is used for treatment, and the flow rate of argon gas is controlled to range from 5.5 to 6.5 L / min. the method has the advantages of simple equipment, convenience in operation, high coating bonding strength and good wear resistance, produces no damage to metal surface, greatly improves the bonding strength and wear resistance of the surface of stainless steel, improves the work stability of Cr-Ni stainless steel, and extends the service life.

Description

technical field [0001] The invention relates to a metal material surface treatment technology, in particular to a Cr-Ni series stainless steel thermal cladding surface strengthening method. Background technique [0002] Stainless steel was one of the greatest inventions in the field of materials in the early 20th century. Due to the unique advantages of stainless steel, corrosion resistance, heat resistance, low temperature, manufacturability, long life, and recyclability, it is widely used in various fields of industry, agriculture, national defense and people's daily life. It is considered to be a metal material with great development potential. Cr-Ni stainless steel is a typical stainless steel, because of its high strength, hardness, wear resistance, corrosion resistance, impact resistance, oxidation resistance and other advantages, it is widely used in the automobile industry, petrochemical industry, Nuclear industry, water conservancy industry and other fields. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 张瑞珠郭鹏严大考李勇唐明奇李瑞静
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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