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A nano-oxide dispersion strengthened steel part and its rapid additive manufacturing method

A nano-oxide and dispersion strengthening technology, applied in the field of additive manufacturing, can solve the problems that limit the actual production and application of ODS steel, and achieve the effects of inhibiting aggregation and growth, rapid cooling and solidification, and simple operation

Active Publication Date: 2022-04-01
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, subsequent solidification molding processes such as hot isostatic pressing and hot extrusion are generally difficult to directly prepare large and complex components.
The above shortcomings limit the actual production and application of ODS steel to a large extent.

Method used

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  • A nano-oxide dispersion strengthened steel part and its rapid additive manufacturing method
  • A nano-oxide dispersion strengthened steel part and its rapid additive manufacturing method
  • A nano-oxide dispersion strengthened steel part and its rapid additive manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The rapid additive manufacturing method for nano-oxide dispersion strengthened steel provided in Example 1 of the present invention mainly includes the following steps:

[0043] First, with 316 stainless steel powder and nano Y 2 o 3 Powder is the raw material, where Y 2 o 3 The blending amount is 1wt%, and 1wt% stearic acid is added as a process control agent at the same time, all of which are added into a stainless steel ball mill jar, evacuated to a vacuum, and ball milled on a planetary ball mill for 1 hour to obtain a mixed powder. Then, after the mixed powder is wrapped with a steel belt by a molding machine, it is then reduced in diameter by a multi-channel die of a wire drawing machine to obtain a metal cored wire with a diameter of 1.5 mm, wherein the powder filling rate is 10%. Finally, put the obtained flux-cored wire into the arc fuse device, set the operating current to 150A, the operating voltage to 20V, the moving speed of the welding torch to 5mm / s, a...

Embodiment 2

[0046] The rapid additive manufacturing method for nano-oxide dispersion strengthened steel provided in Embodiment 2 of the present invention mainly includes the following steps:

[0047] First, with 316 stainless steel powder and nano Y 2 o 3 Powder is the raw material, where Y 2 o 3 The blending amount is 5wt%, and 10wt% stearic acid is added as a process control agent at the same time, all the above raw materials are added into a stainless steel ball mill tank, evacuated to a vacuum, and ball milled on a planetary ball mill for 5 hours to obtain a mixed powder. Then, the mixed powder is wrapped with a steel belt by a molding machine, and then passed through a multi-channel die of a wire drawing machine to reduce the diameter to obtain a metal core wire with a diameter of 1 mm, wherein the powder filling rate is 15%. Finally, put the obtained flux-cored wire into the arc fuse device, set the operating current to 150A, the operating voltage to 25V, the moving speed of the ...

Embodiment 3

[0050] The method for rapid additive manufacturing of nano-oxide dispersion strengthened steel provided in Embodiment 3 of the present invention mainly includes the following steps:

[0051] First, with 316 stainless steel powder and nano Y 2 o 3 Powder is the raw material, where Y 2 o 3 The blending amount is 5wt%, and 5wt% stearic acid is added as a process control agent at the same time, all the above raw materials are added into a stainless steel ball mill tank, evacuated to a vacuum, and ball milled and mixed on a planetary ball mill for 10 hours to obtain a mixed powder. Then the mixed powder is wrapped with a steel belt by a molding machine, and then passed through a multi-channel die of a wire drawing machine to reduce the diameter to obtain a metal core wire with a diameter of 2 mm, wherein the powder filling rate is 20%. Finally, put the obtained flux-cored wire into the arc fuse device, set the operating current to 200A, the operating voltage to 20V, the moving s...

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Abstract

The invention belongs to the technical field related to additive manufacturing, and discloses a nano-oxide dispersion strengthened steel piece and a rapid additive manufacturing method thereof. The method includes the following steps: (1) making alloy steel powder and nano-oxide powder Ball milling and mixing to obtain mixed powder; (2) Wrap the mixed powder with a steel belt, and obtain the drug core wire by forming and drawing; (3) Use the drug core wire as raw material, use the arc fuse manufacturing equipment to make the parts to be manufactured The robot code corresponding to the 3D model of , performs multi-layer arc fuse additive manufacturing on the substrate to obtain nano-oxide dispersion-strengthened steel parts. The invention utilizes the characteristics of arc fuse small molten pool smelting and rapid cooling and solidification to suppress the growth and aggregation of nano-oxides, and utilizes the characteristics of additive manufacturing without molds and high forming efficiency to realize the production of large complex metal components The preparation improves the preparation efficiency and provides a new way for large-scale preparation of nano-ODS steel.

Description

technical field [0001] The invention belongs to the technical field related to additive manufacturing, and more specifically relates to a nano-oxide dispersion strengthened steel piece and a rapid additive manufacturing method thereof. Background technique [0002] Oxide Dispersion Strengthened (ODS) steel is characterized by a large number of nano oxide particles dispersed in the matrix. These second-phase nano-oxide particles with high melting point and good thermal stability can effectively hinder dislocation and grain boundary slip, thus endowing the material with excellent high temperature creep resistance. Moreover, a large number of interfaces formed between the nano-oxide particles and the matrix can absorb He bubbles generated during the irradiation process to form He traps, which significantly improves its anti-irradiation performance. Therefore, ODS steel has great application prospects in nuclear power energy, petrochemical, power machinery and other fields. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04B22F3/105C22C32/00B33Y10/00B33Y70/10
CPCB22F9/04B22F3/1007C22C32/001B33Y10/00B33Y70/00B22F2009/043B22F2009/042B22F10/00B22F10/322B22F10/25B22F10/32Y02P10/25
Inventor 严有为
Owner HUAZHONG UNIV OF SCI & TECH
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