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Hot isostatic pressing three-control method suitable for additive manufacturing parts

A hot isostatic pressing and additive manufacturing technology, applied in the field of additive manufacturing, can solve problems such as material control, achieve industrialized production, eliminate residual pores and micro-cracks, and improve fatigue performance and service life.

Active Publication Date: 2016-05-11
CHINA IRON & STEEL RES INST GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of preparing the blisk of the above-mentioned invention patent, the hot isostatic pressing treatment of the blisk is similar to the densification of conventional castings, and the phase of the material is not controlled, and the performance of the metal material is closely related to its phase and structure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 - Hot isostatic pressing and three-control treatment of additively manufactured FGH95 superalloy blades

[0039] 1. Detect the defects of FGH95 superalloy blades manufactured by additive manufacturing. The relative density is 99.3% (porosity 0.7%), and there are 3 microcracks inside; the tooling is designed according to the shape of parts of FGH95 superalloy blades manufactured by additive manufacturing;

[0040] 2. Hot isostatic pressing treatment after furnace installation, process parameters: hot isostatic pressing temperature 1200°C, pressure 150MPa, holding time 3h;

[0041] 3. After the hot isostatic pressing treatment, carry out stress relief annealing treatment. Process parameters: drop to 600 °C at a cooling rate of 5 °C / min, keep warm for 5 hours, and then cool to room temperature with the furnace, that is, the three-controlled hot isostatic pressing Processing of additively manufactured FGH95 superalloy blades.

[0042] Defect detection was carried...

Embodiment 2

[0043] Example 2 - Hot isostatic pressing and three-control treatment of additively manufactured TC4 titanium alloy impeller

[0044]1. Detect the defects of the TC4 titanium alloy impeller manufactured by additive manufacturing, the relative density is 98.8% (porosity 1.2%), and there is one micro-crack inside; the tooling is designed according to the part shape of the TC4 titanium alloy impeller manufactured by additive manufacturing;

[0045] 2. Hot isostatic pressing treatment after furnace installation, process parameters: hot isostatic pressing temperature 1050 ° C, pressure 160 MPa, solid solution treatment is carried out while hot isostatic pressing treatment is carried out, and the total holding time is 3 hours;

[0046] 3. Cool down to room temperature at a cooling rate of 200°C / min to obtain an additively manufactured TC4 titanium alloy impeller that has undergone hot isostatic pressing and three-control treatment.

[0047] The defect and phase analysis of the addit...

Embodiment 3

[0048] Example 3 - Hot isostatic pressing and three-control treatment of additively manufactured 2A50 aluminum alloy wheels

[0049] 1. Detect the defects of 2A50 aluminum alloy wheels manufactured by additive manufacturing, the relative density is 98.4% (porosity 1.6%), and there are 2 micro-cracks inside; the tooling is designed according to the parts shape of additively manufactured 2A50 aluminum alloy wheels;

[0050] 2. Hot isostatic pressing treatment is carried out after furnace installation, process parameters: hot isostatic pressing temperature 520°C, pressure 200MPa, solid solution treatment is carried out while hot isostatic pressing treatment is carried out, and the total holding time is 5h;

[0051] 3. Cool down to room temperature at a cooling rate of 2000°C / min, then heat up to 160°C for aging treatment, holding time for 12h, after furnace cooling, the additively manufactured 2A50 aluminum alloy wheel hub that has undergone hot isostatic pressing and three-contro...

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PUM

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Abstract

The invention belongs to the technical field of additive manufacturing, and relates to a hot isostatic pressing three-control method suitable for additive manufacturing parts. The method comprises the steps that design of the hot isostatic pressing treatment technology is firstly carried out according to the materials and defect conditions of parts, in order to prevent deformation of the parts in complex shapes, the low-temperature and high-pressure treatment technology is selected, and auxiliary tools are matched to guarantee the shapes and size precision of the parts. In addition, in the hot isostatic pressing treatment process, according to the requirement of the phase control technology of the parts, heat treatment is selected to be carried out while hot isostatic pressing high-temperature treatment is carried out, or heat treatment is carried out in the cooling process after hot isostatic pressing treatment is finished, phases and structures are regulated and controlled, and the additive manufacturing parts with the needed performance are obtained. Control over the shapes of the additive manufacturing parts, improving of the performance of the additive manufacturing parts and phase control of the additive manufacturing parts are combined, shape control, performance control and phase control are achieved in the short procedure in the hot isostatic pressing technology process, cost can be better reduced, and industrial production can be achieved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a three-control hot isostatic pressing method suitable for additive manufacturing parts. Background technique [0002] Additive manufacturing is a technology that manufactures components by layer-by-layer printing. Applicable materials include plastics, resins, ceramics, metals, etc. In the early stage of the development of additive manufacturing technology, it was often used to manufacture models in the fields of mold manufacturing and industrial design. With the continuous advancement of technology, it was gradually used for direct manufacturing of some products, especially large-sized and complex shapes that cannot be produced by conventional processes. Metal parts show great application prospects in aerospace, military, automobile and other industries. [0003] Titanium alloys, high-temperature alloys, ultra-high-strength steels, and aluminum alloy...

Claims

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Application Information

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IPC IPC(8): B22F3/15B22F3/24B33Y10/00
CPCB22F3/15B22F3/24B22F2003/248B33Y10/00
Inventor 陈宏霞张德明叶青李阳吴爽章万千薛鹏举史玉升郭志猛
Owner CHINA IRON & STEEL RES INST GRP
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