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Porous chromium alloy material and preparation method thereof

A chromium alloy and porous metal technology, applied in the field of porous chromium alloy materials and their preparation, can solve the problems of restricting the use and production of porous chromium alloys, the influence of high temperature resistance, and the difficulty in controlling the coating amount, and achieves good high temperature oxidation resistance, Low cost and the effect of improving high temperature oxidation resistance

Inactive Publication Date: 2010-09-15
CHANGSHA LYRUN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its preparation method, at present, mostly adopts processes such as thermal spraying chromium on the surface of the substrate, thermal chromium infiltration, etc., but this kind of process, one is high cost, and the other is that the chromium coating is uneven, and the coating amount is not easy to control. Therefore, its durability High temperature performance is greatly affected, which greatly limits the use and production of porous chromium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The porous chromium alloy material of the present embodiment is a three-dimensional network structure, the base material is a porous iron-nickel alloy, the surface of the porous iron-nickel alloy is covered with metal chromium, and the quality of chromium accounts for 28% of the total mass of the metal material; the coating amount of metal chromium It is 1550 grams per square meter.

[0016] Preparation: 10mm thick, 30PPI, surface density (the amount of metal per unit area) 4000g / m 2 The surface of the foamed iron-nickel alloy substrate is electroplated with chromium, and the electroplating solution is: chromic anhydride: 250g / L sulfuric acid: 2g / L trivalent chromium: 1.2g / L Cr-1 additive: 20ml / L chromium fog inhibitor: 2ml / L; the current density is 20A / dm 2 , the temperature is 50°C. The amount of plated metal chromium reaches 1550g / m 2 Then stop electroplating. The semi-finished product after electroplating is placed in a heat treatment furnace, and a mixed gas o...

Embodiment 2

[0019] The porous chromium alloy material of this embodiment is a three-dimensional network structure, and the base material is foamed nickel, and the surface of the foamed nickel is covered with metal chromium, and the quality of chromium accounts for 17% of the total mass of the material; the coating amount of metal chromium is 88 grams per square meter .

[0020] Preparation: at a thickness of 1.6mm, 110PPI, surface density (the amount of metal per unit area) 420g / m 2 The surface of the porous nickel substrate is electroplated with chromium, and the electroplating solution is: chromic anhydride: 200g / L sulfuric acid: 1g / L trivalent chromium: 0.6g / L Cr-1 additive: 12ml / L chromium fog inhibitor: 1ml / L ;The current density is 30A / dm 2 , the temperature is 60°C. , the amount of chromium on the plated metal reaches 88g / m 2 Then stop electroplating. The semi-finished product after electroplating is placed in a heat treatment furnace, and a mixed gas of hydrogen and nitrogen i...

Embodiment 3

[0023] The porous chromium alloy material of the present embodiment is a three-dimensional network structure, and the base material is foamed iron, and the surface of the foamed iron is covered with metal chromium, and the quality of chromium accounts for about 9% of the total mass of the material; the coating amount of metal chromium is 55 grams per square meter .

[0024] At a thickness of 3mm, 60PPI, surface density (the amount of metal per unit area) 500g / m 2 The surface of the porous iron substrate is electroplated with chromium, and the electroplating solution is: chromic anhydride: 230g / L sulfuric acid: 1.8g / L trivalent chromium: 0.8g / L Cr-1 additive: 18ml / L chromium fog inhibitor: 1.8ml / L; the current density is 10A / dm 2 , the temperature is 40°C. The amount of chromium in the plated metal reaches 55g / m 2 Then stop electroplating. Place the semi-finished product after electroplating in a vacuum heat treatment furnace, the heat treatment temperature is 800°C, and t...

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Abstract

The invention relates to a porous chromium alloy material and a preparation method thereof, wherein the porous chromium alloy material is in a three-dimensional netted structure, a base material is porous metallic iron, nickel or an iron-nickel alloy, metallic chromium is plated on the surface of the base material, and the mass of the chromium accounts for 5-30 percent of the gross mass of a metal material. The preparation method thereof comprises the following steps of: plating the chromium on the surface of the porous metallic iron, the nickel or the iron-nickel alloy; and then, carrying out heat processing on the iron, the nickel or the iron-nickel alloy after chromium plating in a heat processing furnace. The porous chromium alloy material has high temperature resistance, higher strength, simple preparation process and low cost and is suitable for large-scale production.

Description

technical field [0001] The invention relates to an alloy material and a preparation method thereof, in particular to a porous chromium alloy material and a preparation method thereof. Background technique [0002] Various porous metal materials are commonly used in many fields, such as nickel foam for battery substrates, copper foam for filter materials, etc. Chromium is considered to have high temperature resistance, therefore, porous chromium alloy is considered to be suitable for use as a substrate for automobile exhaust gas purification. Its preparation method, at present, mostly adopts processes such as thermal spraying chromium on the surface of the substrate, thermal chromium infiltration, etc., but this kind of process, one is high cost, and the other is that the chromium coating is uneven, and the coating amount is not easy to control. Therefore, its durability The high temperature performance is greatly affected, which greatly limits the use and production of poro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/06C25D5/50
Inventor 洪志刚肖腾彬段志明俞钧蒋素斌刘纯辉邵聪
Owner CHANGSHA LYRUN NEW MATERIAL CO LTD
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