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Preparation method of tubular porous metal element with tiny permeation flux

A metal element and permeation flux technology, which is applied in the field of preparation of tubular porous metal elements with tiny permeation flux, can solve the problems of insufficient dimensional accuracy and infiltration, and achieve reuse, low requirements for production equipment, and high preparation process simple effect

Active Publication Date: 2021-11-30
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, a hard tool is used to carry out forced relative motion processing on the surface of the blank of the tubular porous element, so that part of the porous material is collectively peeled off, and by controlling the conditional process parameters of the relative motion processing, the dimensional accuracy of the tubular porous metal element and the Precise control of infiltration amount solves the problem of insufficient dimensional accuracy and infiltration amount in the preparation of traditional tubular porous metal materials

Method used

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  • Preparation method of tubular porous metal element with tiny permeation flux

Examples

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Embodiment 1

[0021] like figure 1 As shown, this embodiment includes the following steps:

[0022] Step 1. Put the screened 316L stainless steel powder into a mold for cold isostatic pressing to prepare a tubular porous material compact; the size of the tubular porous material compact is: length 2000mm, diameter 200mm, wall thickness 20mm; The pressure of cold isostatic pressing is 180MPa, and the holding time is 30s;

[0023] Step 2: Carrying out high-temperature sintering of the tubular porous material compact prepared in step 1 to obtain a tubular porous element blank; the temperature of the high-temperature sintering is 1200° C., and the holding time is 2 hours;

[0024] Step 3. Clamp the tubular porous element blank obtained in step 2 on an axially rotatable lathe, under the conditions of a speed of 100r / min, a feed rate of 0.2mm / r, and a processing capacity of 1.5mm each time , using a high-speed steel tool to process the relative movement of the surface of the blank of the tubular...

Embodiment 2

[0027] like figure 1 As shown, this embodiment includes the following steps:

[0028] Step 1. Put the screened Inconel 625 alloy powder into a mold for cold isostatic pressing to prepare a tubular porous material compact; the size of the tubular porous material compact is: length 50mm, diameter 120mm, wall thickness 12mm; The pressure of cold isostatic pressing is 160MPa, and the holding time is 30s;

[0029] Step 2: Carrying out high-temperature sintering of the tubular porous material compact prepared in step 1 to obtain a tubular porous element blank; the temperature of the high-temperature sintering is 1240° C., and the holding time is 2 hours;

[0030] Step 3: Clamp the tubular porous element blank obtained in step 2 on a lathe that can rotate axially, under the conditions of a rotation speed of 1000r / min, a feed rate of 1.2mm / r, and a processing capacity of 0.2mm each time , using a high-speed alloy tool to process the relative movement of the surface of the blank of t...

Embodiment 3

[0033] like figure 1 As shown, this embodiment includes the following steps:

[0034] Step 1. Put the screened TA0 powder into a mold for cold isostatic pressing to prepare a tubular porous material compact; the size of the tubular porous material compact is: length 500mm, diameter 20mm, wall thickness 6mm; the cold The pressure of isostatic pressing is 100MPa, and the holding time is 30s;

[0035] Step 2: Carrying out high-temperature sintering of the tubular porous material compact prepared in step 1 to obtain a tubular porous element blank; the temperature of the high-temperature sintering is 1050° C., and the holding time is 1.5 h;

[0036] Step 3. Clamp the tubular porous element blank obtained in step 2 on an axially rotatable lathe, under the conditions of a rotation speed of 475r / min, a feed rate of 0.8mm / r, and a processing capacity of 0.9mm each time , using a diamond tool to process the relative movement of the surface of the blank of the tubular porous element to...

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Abstract

The invention discloses a preparation method of a tubular porous metal element with tiny permeation flux. The method comprises the following steps of 1, preparing a tubular porous material pressed blank by using metal powder as a raw material and adopting a cold isostatic pressing method; 2, performing high-temperature sintering on a tubular porous material pressed blank to obtain a tubular porous element blank; and 3, carrying out relative movement treatment on the surface of the tubular porous element blank through a hard tool, and a tubular porous metal element is obtained. According to the method, the hard tool is adopted for carrying out forced relative movement treatment on the surface of the tubular porous element blank prepared through a powder sintering method, so that part of the porous material is stripped and falls off collectively, by controlling the condition technological parameters of the relative movement treatment, precise control over the size precision and the permeation amount of the tubular porous metal element is achieved at the same time, and the requirements of the modern industry on the porous metal material with small permeation flux are met.

Description

technical field [0001] The invention belongs to the field of porous metal materials, and in particular relates to a preparation method of a tubular porous metal element with small permeation flux. Background technique [0002] Due to the characteristics of highly connected three-dimensional pore structure, high specific surface area, and low density, porous materials are indispensable in the process links such as filtration separation, fluidization distribution control, and thermal management in the nuclear industry, chemical machinery, and aerospace and other modern industrial fields. substitute role. Using powder particles as raw materials, the tubular porous element produced by pressing-sintering-processing has the advantages of large specific surface area, good assembly performance and high replaceability, and has become the main structural form of modern industrial centered porous elements. [0003] With the development of science and technology, modern industrial tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/10B22F3/11B22F5/10
CPCB22F3/10B22F3/11B22F5/106Y02E30/30
Inventor 杨坤荆鹏王晓罡王建王昊石英
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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