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Laser cladding powder for 1cr15ni4mo3n steel and its preparation method

A laser cladding, powder technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve the problem of wetting characteristics, melting point and physical and chemical compatibility with large differences, cladding interface pores Inclusion of micro-cracks, multi-metallurgical defect micro-cracks and other problems, to achieve the effects of excellent bonding strength, purification of melt and grain boundaries, and reduction of composition and structure segregation

Active Publication Date: 2018-05-15
国营芜湖机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on relevant research at home and abroad. Due to the large difference between the existing Fe314 or Fe316 powder and its composition, the wetting characteristics, melting point and physical and chemical compatibility are also greatly different, resulting in a large number of gaps in the cladding interface. defects such as porosity, inclusions and microcracks, and produce high dilution rates
At the same time, since laser cladding is a rapid cooling and solidification process, it usually leads to a relatively high brittleness of the cladding layer, which is easy to form more metallurgical defects and produce microscopic cracks, so it is difficult to guarantee its excellent strength and toughness.

Method used

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  • Laser cladding powder for 1cr15ni4mo3n steel and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1Crl5Ni4Mo3N steel laser cladding powder, the amount of each component in the 1Crl5Ni4Mo3N steel laser cladding powder is by weight percentage: C 0.09%, Cr 13.2%, Ni 4.1%, Mo 2.2%, Mn 0.47%, Si 0.10 %, N0.03%, B 0.02%, La 0.006%, S 0.010%, P 0.014%, and the balance is iron.

[0035] The specific preparation method is:

[0036] Step 1: Ingredients: Prepare the raw material 1Crl5Ni4Mo3N round bar and high-purity Fe / Si / B / La alloy powder according to the weight percentage content of each component in the above-mentioned laser cladding powder;

[0037] Step 2: Melting: put the raw materials prepared in Step 1 into a high-vacuum protection electric furnace for melting under the protection of argon, the melting temperature is 1400°C, and the holding time is 10 hours to obtain an alloy melt;

[0038] Step 3: atomization: further atomize the alloy solution obtained in step 2, the atomization medium is an argon atmosphere at -15°C, and the atomization pressure is 5MPa; hydrogen ...

Embodiment 2

[0041] 1Crl5Ni4Mo3N steel laser cladding powder, the amount of each component in the 1Crl5Ni4Mo3N steel laser cladding powder is by weight percentage: C 0.09%, Cr 13.2%, Ni 4.5%, Mo 2.2%, Mn 0.47%, Si 0.15 %, N0.03%, B 0.05%, Ce 0.01%, S 0.010%, P 0.014%, and the balance is iron.

[0042] The specific preparation method is:

[0043] Step 1: Ingredients: Prepare the raw material 1Crl5Ni4Mo3N round bar and high-purity Fe / Si / B / Ce alloy powder according to the weight percentage content of each component in the above-mentioned laser cladding powder;

[0044] Step 2: Melting: Put the raw materials prepared in Step 1 in a high vacuum protection electric furnace for melting under the protection of argon, the melting temperature is 1400°C, and the holding time is 12 hours to obtain an alloy melt;

[0045] Step 3: Atomization: further atomize the alloy solution obtained in step 2, the atomization medium is an argon atmosphere at -14°C, and the atomization pressure is 5.5MPa; hydrogen g...

Embodiment 3

[0048] Laser cladding powder for 1Crl5Ni4Mo3N steel, the amount of each component in the laser cladding powder for 1Crl5Ni4Mo3N steel is: C 0.09%, Cr 13.2%, Ni 5.1%, Mo 2.2%, Mn 0.47%, Si 0.25 %, N 0.03%, B 0.10%, La 0.01%, Ce 0.01%, S 0.010%, P 0.014%, and the balance is iron.

[0049] The specific preparation method is:

[0050] Step 1: Ingredients: Prepare the raw material 1Crl5Ni4Mo3N round bar and high-purity Fe / Si / B / La / Ce alloy powder according to the weight percentage content of each component in the above-mentioned laser cladding powder;

[0051] Step 2: Melting: put the raw materials prepared in Step 1 into a high vacuum protection electric furnace for melting under the protection of argon, the melting temperature is 1500°C, and the holding time is 10 hours to obtain an alloy melt;

[0052] Step 3: Atomization: further atomize the alloy solution obtained in step 2. The atomization medium is an argon atmosphere at -13°C, and the atomization pressure is 5.5MPa; The vo...

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Abstract

The invention relates to laser cladding powder for 1Cr15Ni4Mo3N steel and a preparation method for the laser cladding powder, wherein the laser cladding powder consists of the following components in percentage by weight: 0.09%-0.14% of C, 13.2%-15.2% of Cr, 4.1%-5.3% of Ni, 2.2%-2.7% of Mo, 0.47%-0.98% of Mn, 0.10%-0.93% of Si, 0.03%-0.08% of N, 0.02%-0.15% of B, 0.006%-0.048% of rare earth, 0.010%-0.016% of S, 0.014%-0.022% of P, and the balance iron. The laser cladding powder provided by the invention is specially used in a laser cladding process of 1Cr15Ni4Mo3N steel, so that toughness of a clad layer is improved, excellent bonding strength of a clad interface is guaranteed, wettability of cladding powder is improved, the clad layer is restrained from being cracked, and a crack propagation rate is reduced.

Description

technical field [0001] The invention relates to laser cladding technology, in particular to laser cladding powder for 1Cr15Ni4Mo3N steel and a preparation method. Background technique [0002] 1Cr15Ni4Mo3N steel has the advantages of high strength, corrosion resistance, oxidation resistance and weldability. It can be used for load-bearing parts and fasteners that work in the atmosphere and fuel for a long time below 300 ° C. It is used for large business aircraft, air combat It can be used in rotor hubs of aircraft and helicopters, and can be used for load-bearing components such as rotating gears and fasteners that require high precision. However, in the actual heat treatment process of such materials as 1Cr15Ni4Mo3N steel, the hardness and strength are often lower than the lower limit, and the wear resistance is reduced, which leads to failure in actual application. At present, adjustment of heat treatment temperature or surface treatment is usually used, but these method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44C22C38/54C22C38/04C22C38/02C23C24/10B82Y30/00
CPCB82Y30/00C22C38/001C22C38/002C22C38/005C22C38/02C22C38/04C22C38/44C22C38/54C23C24/103
Inventor 阚艳张保森黄卫华张志强张小辉孙涛程宗辉曹强许宜军陈海牛曾晓利
Owner 国营芜湖机械厂
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