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Laser additive manufacturing method for iron nickel-manganese copper dissimilar material metal part

A technology of laser additive and manufacturing methods, which is applied in the direction of additive manufacturing, additive processing, and improvement of process efficiency. It can solve problems such as large thermal stress and complex melting behavior, and avoid cracks, cracks, and insoluble Particles, the effect of reducing the germination tendency

Active Publication Date: 2020-07-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the melting, solidification and cooling of materials are carried out under extremely fast conditions, it is easy to generate large thermal stress in the formed parts, and iron-nickel and manganese-copper are alloys with large differences in properties. Due to the huge difference in thermophysical properties such as melting point and thermal expansion coefficient, the melting behavior of mixed alloy powder in the molten pool is more complicated than that of a single alloy

Method used

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  • Laser additive manufacturing method for iron nickel-manganese copper dissimilar material metal part
  • Laser additive manufacturing method for iron nickel-manganese copper dissimilar material metal part
  • Laser additive manufacturing method for iron nickel-manganese copper dissimilar material metal part

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Embodiment 1

[0039] This embodiment includes the following steps:

[0040] Step 1. Using Invar36 iron-nickel alloy powder as raw material, the iron-nickel alloy is deposited on the SS316 stainless steel substrate in an argon atmosphere by laser selective melting method; the Invar36 iron-nickel alloy powder is spherical and has a particle size of 15 μm to 53 μm. Invar36 iron-nickel alloy powder was pre-vacuum-dried at 120°C for 3 hours, and the SS316 stainless steel substrate was pre-cleaned with ethanol and air-dried; the deposition parameters were: laser power 120W-150W, scanning speed 700mm / s-900mm / s, The scanning distance is 70μm~90μm, the layer thickness is 20μm, and the spot diameter is 100μm;

[0041] Step 2: Accurately weigh and mix Invar36 iron-nickel alloy powder and manganese-copper alloy powder whose nominal composition is MnCu48Zn2Al1.8, then put them into a ball mill jar, ball mill and mix them on a planetary ball mill for 3 hours, and then place them in a vacuum environment a...

Embodiment 2

[0066] This embodiment includes the following steps:

[0067] Step 1. Using Invar36 iron-nickel alloy powder as raw material, the iron-nickel alloy is deposited on the SS316 stainless steel substrate in an argon atmosphere by laser selective melting method; the Invar36 iron-nickel alloy powder is spherical and has a particle size of 15 μm to 53 μm. Invar36 iron-nickel alloy powder was pre-vacuum-dried at 120°C for 3 hours, and the SS316 stainless steel substrate was pre-cleaned with ethanol and air-dried; the deposition parameters were: laser power 150W, scanning speed 900mm / s, scanning distance 80μm, layer thickness 20μm, spot diameter 100μm;

[0068] Step 2: Accurately weigh and mix Invar36 iron-nickel alloy powder and manganese-copper alloy powder whose nominal composition is MnCu48Zn2Al1.8, then put them into a ball mill jar, ball mill and mix them on a planetary ball mill for 3 hours, and then place them in a vacuum environment at 120°C Drying for 3h under the hood, resp...

Embodiment 3

[0072] This embodiment includes the following steps:

[0073] Step 1. Using Invar36 iron-nickel alloy powder as raw material, the iron-nickel alloy is deposited on the SS316 stainless steel substrate in an argon atmosphere by laser selective melting method; the Invar36 iron-nickel alloy powder is spherical and has a particle size of 15 μm to 53 μm. Invar36 iron-nickel alloy powder was pre-vacuum-dried at 120°C for 3 hours, and the SS316 stainless steel substrate was pre-cleaned with ethanol and air-dried; the deposition parameters were: laser power 150W, scanning speed 900mm / s, scanning distance 80μm, layer thickness 20μm, spot diameter 100μm;

[0074] Step 2: Accurately weigh and mix Invar36 iron-nickel alloy powder and manganese-copper alloy powder whose nominal composition is MnCu48Zn2Al1.8, then put them into a ball mill jar, ball mill and mix them on a planetary ball mill for 3 hours, and then place them in a vacuum environment at 120°C Drying for 3h under the hood, resp...

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Abstract

The invention discloses a laser additive manufacturing method of an iron nickel-manganese copper dissimilar material metal part. The method comprises the following steps that firstly, an iron-nickel alloy is deposited on a substrate by adopting a laser additive manufacturing method; secondly, mixed powder composed of iron-nickel alloy powder with the iron-nickel alloy powder mass content larger than 70% or smaller than 50% and manganese-copper alloy powder serves as a raw material, and an iron nickel-manganese copper transition area is formed through deposition with the laser additive manufacturing method; and thirdly, manganese-copper alloy is deposited on the iron nickel-manganese copper transition area through the laser additive manufacturing method, the substrate is removed, and the iron nickel-manganese copper dissimilar material metal part is obtained. According to the method, by adjusting the deposition direction and controlling the transition path of the mixed powder, the defects of cracking, undissolved particles and the like of the iron nickel-manganese copper gradient material are overcome, and the obtained iron nickel-manganese copper dissimilar material metal part is compact in structure and small in transition area size, has the damping performance and low expansion performance and is wide in application range.

Description

technical field [0001] The invention belongs to the technical field of preparation of heterogeneous materials, and in particular relates to a laser additive manufacturing method for metal parts of iron-nickel-manganin-copper heterogeneous materials. Background technique [0002] Functional graded materials (Functional graded materials, FGM) can combine materials with different properties due to the gradual changes in their composition, microstructure and performance in three-dimensional space, so as to realize the functional integration and lightweight of parts. The traditional preparation methods of FGM can be divided into the following categories: vapor deposition method, plasma spraying method, centrifugal casting method, powder metallurgy method. However, these methods have various limitations, such as limited manufacturing size, difficulty in overcoming the combination of gradient regions, and difficult to precisely control the composition of gradient regions. The tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B33Y10/00B33Y70/00
CPCB33Y10/00B33Y70/00B22F2999/00B22F10/00B22F10/25B22F10/28B22F10/36B22F10/32B22F2207/01Y02P10/25
Inventor 谭华张矗郝大鹏林鑫黄卫东
Owner NORTHWESTERN POLYTECHNICAL UNIV
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