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Multi-arc ion plating cavitation erosion resistant nickel-based metal coating and preparation method thereof

A multi-arc ion plating and base metal technology, applied in metal material coating process, ion implantation plating, coating, etc., can solve problems such as weak cavitation resistance, reduced coating protection life, poor mechanical properties, etc. , to achieve the effect of improving the ability to resist plastic deformation, reducing self-damage, and improving grain boundary strengthening

Pending Publication Date: 2021-11-30
SONGSHAN LAKE MATERIALS LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stainless steel is a commonly used structural material for flow-through parts, but its poor mechanical properties are weak against cavitation erosion. In engineering, a hard coating is often applied to its surface, such as WC-Co, Fe-based amorphous, TiN ceramic coating, etc. for cavitation protection
However, the poor toughness of this type of coating itself can easily lead to the rapid initiation and expansion of cavitation cracks, which greatly reduces the protective life of the coating.

Method used

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  • Multi-arc ion plating cavitation erosion resistant nickel-based metal coating and preparation method thereof
  • Multi-arc ion plating cavitation erosion resistant nickel-based metal coating and preparation method thereof
  • Multi-arc ion plating cavitation erosion resistant nickel-based metal coating and preparation method thereof

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Embodiment 1

[0025] Embodiment 1: This embodiment provides a multi-arc ion plating anti-cavitation nickel-based metal coating and a preparation method thereof, which includes the following steps:

[0026] (1) Take by weighing 64.5% of Ni powder, 25% of Cr powder, 10% of Al block, and 0.5% of Y powder according to the formula, put them into a multifunctional vacuum induction melting furnace, and put the aluminum block with low melting point first, The raw materials are smelted by induction heating under vacuum conditions, and smelted into cylindrical ingots under the protection of argon. The cylindrical ingot is then machined into a round ingot with a diameter of 100mm and a height of 40mm;

[0027] (2) Process commercial 304L stainless steel into a shape with threads as a sample (substrate), see figure 1, the sample includes a threaded part 1 and a deposition surface 2, and the threaded part 1 facilitates installation on a sample stage of a cavitation erosion machine. Polish the depositi...

Embodiment 2

[0030] Embodiment 2: This embodiment provides a multi-arc ion plating anti-cavitation nickel-based metal coating and a preparation method thereof, which includes the following steps:

[0031] (1) Take by weighing the Ni powder 64.5% of mass fraction ratio, Cr powder 25%, Al block 10%, Y powder 0.5%, put into multifunctional vacuum induction melting furnace, put into the aluminum block of low melting point earlier, The raw materials are smelted by induction heating under vacuum conditions, and smelted into cylindrical ingots under the protection of argon. It was then machined into round ingots with a diameter of 100 mm and a height of 40 mm.

[0032] (2) The commercial 304L stainless steel is processed into a shape with threads as a sample (substrate). The sample includes a threaded part and a deposition surface, and is conveniently installed on the sample stage of a cavitation erosion machine through the threaded part. Polish the deposition surface where the sample needs to b...

Embodiment 3

[0035] Embodiment 3: This embodiment provides a multi-arc ion plating anti-cavitation nickel-based metal coating and its preparation method, which is basically the same as in Embodiment 2, the difference being that the component mass percentage of the coating is: Ni powder 49.5 %, Cr powder 30%, Al block 20%, Y powder 0.5%.

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Abstract

The invention discloses a multi-arc ion plating cavitation erosion resistant nickel-based metal coating and a preparation method thereof. The coating comprises the following components in percentage by mass: 49.5%-80% of Ni, 10%-30% of Cr, 10%-20% of Al and 0-0.5% of Y. The preparation method is simple and easy to operate, high in controllability and low in cost, the nanocrystalline coating with the phase composition of gamma / gamma' is prepared through the multi-arc ion plating technology, the hardness of the coating is greatly improved through grain boundary strengthening and precipitation strengthening and can reach 9.88 GPa, and then the plastic deformation resistance is improved; and nano-pores exist in the coating and have elastic deformation capacity, so that cavitation impact energy is partially dissipated, self-damage is reduced, cavitation crack initiation and expansion are restrained, the cavitation rate is reduced, the cavitation resistance is excellent, in addition, the application range is wide, the coating is suitable for being deposited on iron-based, nickel-based, copper-based, aluminum-based and other materials, and economical efficiency and application prospects are good.

Description

technical field [0001] The invention relates to the technical field of alloy coatings, in particular to a multi-arc ion plating anti-cavitation nickel-based metal coating and a preparation method thereof. Background technique [0002] Cavitation erosion has always been a major problem in engineering and academia because of its widespread occurrence, serious damage and complex mechanism. Every year, cavitation damage causes serious economic losses to many industries such as water conservancy and hydropower, chemical industry, and machinery manufacturing. There is no good solution to this problem so far. [0003] The cause of cavitation is that if the pressure of the micro-bubbles formed in the low-pressure area of ​​the liquid increases, the bubbles collapse immediately to form high-speed micro-jet or shock waves hit the surface of the material and cause mechanical damage. The continuous impact of the bubbles on the surface of the material will cause it to occur. severe mec...

Claims

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Application Information

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IPC IPC(8): C23C14/32C23C14/16C22C19/05C22C30/00C22C1/02
CPCC23C14/325C23C14/16C22C19/058C22C30/00C22C1/023
Inventor 刘正良曾潮流杨凌旭付超
Owner SONGSHAN LAKE MATERIALS LAB
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