Cavitation-corrosion-resistant surfacing welding material

A technology of surface surfacing and welding materials, which is applied in the direction of welding/cutting media/materials, welding media, welding equipment, etc., and can solve the problems of development and application of surface surfacing materials that are not resistant to cavitation corrosion

Active Publication Date: 2010-05-12
镇江艾康医疗器械有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Cavitation-corrosion-resistant surfacing welding material
  • Cavitation-corrosion-resistant surfacing welding material

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Embodiment 1

[0023] Embodiment 1 of the present invention: a cavitation-resistant surfacing material, its specific chemical composition is: C0.05%; Cr13%; Co1.0%; Mo1.5%; Ni6.0%; Mn0.5% ; Si0.3%; P≤0.03%; S≤0.03%; the balance is Fe. Surfacing welding is carried out for 1Cr18Ni9Ti, a commonly used material for turbine blades. Before welding, the surfacing surface is polished with metallographic sandpaper, cleaned with acetone, and then the surface is welded with MIG. The welding parameters are: welding voltage U=25.4V, welding current I=200A, shielding gas flow rate of 18L / min, welding The speed is 5mm / s. After surfacing welding, the cavitation corrosion test is carried out with JY98-IIIDN ultrasonic cell pulverizer, the vibration frequency is 20kHz, the medium is distilled water, and the cooling water temperature is controlled at 21°C. The microscopic observation of the cavitation corrosion site shows that: using the surfacing material with this composition for MIG surface welding, the n...

Embodiment 2

[0024] Embodiment 2 of the present invention: a cavitation-resistant surfacing material, its specific chemical composition is: C0.05%; Cr15%; Co1.2%; Mo1.5%; Ni6.5%; Mn0.5% ; Si0.5%; P≤0.03%; S≤0.04%; the balance is Fe. Surfacing welding for 1Cr18Ni9Ti material. Before welding, the surfacing welding surface was ground and cleaned with acetone, and then MIG was used for surface welding. The welding parameters and cavitation corrosion test parameters were the same as those in Implementation 1. The microscopic observation of the cavitation corrosion site shows that: using the surfacing material of this composition for MIG surface welding, the number of cavities in the surfacing layer is small, and the size of the cavities is smaller than that of Example 1.

Embodiment 3

[0025] Embodiment 3 of the present invention: a cavitation-resistant surfacing welding material, its specific chemical composition is: C0.07%; Cr17%; Co1.5%; Mo1.8%; Ni7.0%; Mn0.8% ; Si0.5%; P≤0.03%; S≤0.03%; the balance is Fe. Surfacing for 1Cr18Ni9Ti. Before welding, the surfacing welding surface was ground and cleaned with acetone, and then MIG was used for surface welding. The welding parameters and cavitation corrosion test parameters were the same as those in Implementation 1. The microscopic observation of the cavitation corrosion site shows that: using this composition of surfacing material for MIG surface welding, the number of cavitation in the surfacing layer is small, and the size is also small, such as figure 2 shown.

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Abstract

The invention provides a cavitation-corrosion-resistant surfacing welding material, which belongs to the field of novel welding materials. The surfacing material specifically comprises the following chemical components in percentage by mass: less than or equal to 0.10 percent of C, 12 to 25 percent of Cr, 1.0 to 2.0 percent of Co, 1.5 to 2.5 percent of Mo, 6.0 to 8.0 percent of Ni, 0.5 to 1.0 percent of Mn, 0.3 to 0.8 percent of Si, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, and the balance of Fe. The invention has cavitation-corrosion-resistant stainless steel, cobalt-based alloy or nickel-based alloy prepared into cavitation-corrosion-resistant surfacing welding wires and then performs surfacing on conventional materials, and the cavitation-corrosion resistance and lifespan of workpieces subjected to surfacing are greatly improved, while maintenance cost is reduced.

Description

technical field [0001] The invention belongs to the field of new welding materials, and is mainly used for preparing surface overlay welding materials resistant to cavitation corrosion. The use of the overlay welding materials can effectively improve the service life of alloy workpieces resistant to cavitation corrosion and reduce maintenance costs. Background technique [0002] Cavitation corrosion is a corrosion behavior that occurs on fluid equipment such as turbines, propellers, and pumps. It directly leads to the generation of cracks on the material surface and shortens the service life of fluid equipment. Therefore, it is necessary to find a practical way to solve the cavitation corrosion in fluid equipment such as water turbines and propellers in our country. Correspondingly, cavitation-resistant materials have been developed at home and abroad. At present, the main anti-cavitation corrosion materials used in the world are new stainless steel, cobalt-based or nickel...

Claims

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Application Information

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IPC IPC(8): B23K35/30
Inventor 雷玉成朱强陈希章
Owner 镇江艾康医疗器械有限公司
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