Nickel base alloy and stainless steel valve with nickel base alloy layer sealing surface, and production method thereof

A nickel-based alloy, stainless steel technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of thickness limitation, difficult to combine coating performance with metallurgical combination of coating and matrix, and can not guarantee the continuity of cladding process.

Active Publication Date: 2009-02-18
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powder presetting method is generally only suitable for cladding a layer of material on the surface of the material. The thickness of the cladding layer is limited. If the powder is too thick, it is difficult to ensure the metallurgical bonding between the coating and the substrate and good coating performance during cladding. ; The powder preset method cannot guarantee the continuity of the cladding process when the thicker alloy layer is prepared by multi-layer claddin

Method used

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  • Nickel base alloy and stainless steel valve with nickel base alloy layer sealing surface, and production method thereof
  • Nickel base alloy and stainless steel valve with nickel base alloy layer sealing surface, and production method thereof
  • Nickel base alloy and stainless steel valve with nickel base alloy layer sealing surface, and production method thereof

Examples

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Example Embodiment

[0029] Example 1: Using the nickel-based alloy of the present invention to prepare a nickel-based alloy layer on a 1Cr18Ni9Ti stainless steel substrate by a single-pass laser cladding.

[0030] The composition and content of the nickel-based alloy powder used in Example 1 are (wt.%): C: 1.38, Cr: 18.5, Mo: 8.2, W: 3.9, Nb: 2.0, Si: 2.6, Ni: the balance. The nickel-based alloy powder is prepared through a gas atomization process, and the powder size ranges from -100 mesh to +325 mesh.

[0031] The nickel-based alloy powder is atomized by laser cladding gas, and the nickel-based alloy layer is prepared on the 1Cr18Ni9Ti stainless steel substrate through multi-layer single reciprocating scanning. The process parameters of laser cladding are: laser power 3.0kW, spot diameter 3.0mm, powder feeding rate of 5.7g / min, powder feeding carrier gas (argon) flow rate of 2L / min, and cladding channel length of 50mm. figure 1 a (ie figure 1 The four pictures in the picture marked a, figure 1 b...

Example Embodiment

[0033] Example 2: Using the nickel-based alloy of the present invention to prepare a nickel-based alloy layer on a 1Cr18Ni9Ti stainless steel substrate by multi-layer and multi-pass laser cladding.

[0034] The nickel-based alloy powder used in Example 2 is the same as the nickel-based alloy powder used in Example 1.

[0035] The multi-layer lap method is used to prepare a multilayer and multi-layer lap laser cladding nickel-based alloy layer on the 1Cr18Ni9Ti stainless steel substrate. The laser cladding process parameters of this embodiment 2 are: laser power 3.0kW, spot diameter 3.0mm, scanning movement speed 6mm / s, powder feeding rate 5.7g / min, powder feeding carrier gas (argon) flow rate is 2L / min , The length of the cladding channel is 50mm, and the distance between the cladding channels is 2.8mm. There are 3 layers of cladding, 6 overlaps in each layer. The size of the resulting cladding layer is 50mm (length) × 18mm (width) × 2.3mm (thickness) , The hardness of the claddin...

Example Embodiment

[0037] Example 3: Using the nickel-based alloy of the present invention to prepare a nickel-based alloy layer on a 0Cr18Ni10Ti stainless steel substrate by multi-layer and multi-pass laser cladding.

[0038] The nickel-based alloy powder used in Example 3 is the same as the nickel-based alloy powder used in Example 1.

[0039] A multi-layer lap method is used to prepare a multilayer multi-layer lap laser cladding layer on a 15mm thick 0Cr18Ni10Ti stainless steel substrate. The laser cladding process parameters used in this example 3 are: laser power 1.8kW, spot diameter 3.0mm, scanning movement speed 4mm / s, powder feeding rate 4.8g / min, powder feeding carrier gas (argon) flow rate is 2L / min, the length of the cladding channel is 105mm, the distance between the cladding channels is 2.0mm, a total of 4 layers are cladding, and there are 10 overlaps in each layer. The size of the resulting cladding layer is 105mm (length) × 20mm (width) × 3.5mm (thickness) ). image 3 a (ie image 3 T...

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Abstract

The invention relates to a nickel-based alloy, a stainless steel valve provided with a seal surface of a nickel-based alloy layer and a preparation method. The components and the contents of the nickel-based alloy used on the seal surface of the nickel-based alloy layer are respectively: 1.0 to 1.5wt percent of C, 17.5 to 19.5wt percent of Cr 7.0 to 9.0wt percent of Mo, 3.5 to 4.5wt percent of W, 1.5 to 2.5wt percent of Nb, 2.0 to 3.0wt percent of Si and the rest is Ni. The stainless steel valve provided with a seal surface of a nickel-based alloy layer is lead the powder of the nickel-based alloy to form a seal surface nickel-based alloy on the stainless steel valve through a laser plating method. The nickel-based alloy layer and a stainless steel matrix are completely metallurgically bonded without the defects like cracks, air holes, and the like. The alloy layer comprises nickel-based solid solution dendrites, the metallic carbides between the dendrites, the metal silicides, and the like. The reinforced layer of the nickel-based alloy has higher rigidity (HRC43-49) and excellent properties for anti-heat and shock and can be used for preparation the alloy reinforced layer on the seal surface of the stainless steel which has strict demands on the alloy components (B and Co are excluded).

Description

technical field [0001] The invention relates to a nickel-based alloy, a stainless steel valve with a nickel-based alloy layer sealing surface and a preparation method thereof, belonging to the field of surface modification of metal materials. Background technique [0002] Due to its excellent corrosion resistance and mechanical properties, stainless steel is widely used in the manufacture of various acid-resistant valves and high-temperature and high-pressure valves in petrochemical, reactor and nuclear power plants. Since various media are highly corrosive or even radioactive during operation, and the sealing surface of the valve is frequently subjected to friction, extrusion and impact during the opening and closing process, the sealing surface of the valve is easily damaged, which greatly shortens the life of the valve. The service life, and the leakage of the medium may cause stoppage of work and production, environmental pollution and even serious accidents. Therefore,...

Claims

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Application Information

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IPC IPC(8): C22C19/05C23C24/10B22F9/08
Inventor 张永忠席明哲涂义石力开王力军
Owner 有研金属复材技术有限公司
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