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A kind of preparation method of rare earth oxide doped high temperature oxidation resistant and wear resistant coating for H13 steel surface protection

A rare earth oxide, high temperature oxidation resistance technology, applied in coating, metal material coating process, melt spraying and other directions, can solve problems such as mold deformation, mold failure, environmental pollution, etc., to improve service life and improve bonding strength and toughness, the effect of reducing production costs

Active Publication Date: 2020-08-18
GUANGDONG ZHENGDE MATERIAL SURFACE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods also have certain limitations: Nitriding and CVD processes need to be carried out at relatively high temperatures, which can easily lead to deformation of the mold; limited by the size of the furnace, larger molds cannot be treated with PVD technology; hard chromium plating produces Cr6+ has serious environmental pollution

Method used

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  • A kind of preparation method of rare earth oxide doped high temperature oxidation resistant and wear resistant coating for H13 steel surface protection
  • A kind of preparation method of rare earth oxide doped high temperature oxidation resistant and wear resistant coating for H13 steel surface protection
  • A kind of preparation method of rare earth oxide doped high temperature oxidation resistant and wear resistant coating for H13 steel surface protection

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Experimental program
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Embodiment 1

[0032] This embodiment provides a high-temperature oxidation-resistant and wear-resistant coating doped with rare earth oxides for surface strengthening of H13 steel, which is made of nano-CeO 2 powder doped Cr 3 C 2 -NiCr composite powder prepared. The composite powder consists of 98wt% Cr 3 C 2 -NiCr and 2wt% nano CeO 2 Prepared by high-energy ball milling, where Cr 3 C 2 - The composition of the NiCr composite powder is 19-21wt% Ni, 9.1-10.1wt% C, 68.9-71.9wt% Cr, and the balance is O. Cr 3 C 2 - The particle size of the NiCr composite powder is 15-45 μm. nano-CeO 2 The powder purity is 99.99%, and the particle size is 5-20nm.

[0033] The preparation steps are as follows:

[0034] (1) The surface of the H13 steel was cleaned ultrasonically with acetone, and then roughened by sandblasting with 24# white corundum. The surface roughness after sandblasting was Ra3.6μm.

[0035](2) Add the prepared powder into the high-efficiency mixer for pre-mixing for 1 hour, an...

Embodiment 2

[0039] This embodiment provides a high-temperature oxidation-resistant and wear-resistant coating doped with rare earth oxides for surface strengthening of H13 steel, which is made of nano-CeO 2 powder doped Cr 3 C 2 -NiCr composite powder prepared. The composite powder consists of 96wt% Cr 3 C 2 -NiCr and 4wt% nano CeO 2 Prepared by high-energy ball milling, where Cr 3 C 2 - The composition of the NiCr composite powder is 19-21wt% Ni, 9.1-10.1wt% C, 68.9-71.9wt% Cr, and the balance is O. Cr 3 C 2 - The particle size of the NiCr composite powder is 15-45 μm. nano-CeO 2 The powder purity is 99.99%, and the particle size is 5-20nm.

[0040] The preparation steps are as follows:

[0041] (1) The surface of the H13 steel was cleaned ultrasonically with acetone, and then roughened by sandblasting with 24# white corundum. The surface roughness after sandblasting was Ra3.6μm.

[0042] (2) The prepared powder is added to the high-efficiency mixer for pre-mixing for 3 hour...

Embodiment 3

[0046] This embodiment provides a high-temperature oxidation-resistant and wear-resistant coating doped with rare earth oxides for surface strengthening of H13 steel, which is made of nano-CeO 2 powder doped Cr 3 C 2 -NiCr composite powder prepared. The composite powder consists of 94wt% Cr 3 C 2 -NiCr and 6wt% nano CeO 2 Prepared by high-energy ball milling, where Cr 3 C 2 - The composition of the NiCr composite powder is 19-21wt% Ni, 9.1-10.1wt% C, 68.9-71.9wt%, and the balance is O. Cr 3 C 2 - The particle size of the NiCr composite powder is 15-45 μm. nano-CeO 2 The powder purity is 99.99%, and the particle size is 5-20nm.

[0047] The preparation steps are as follows:

[0048] (1) The surface of the H13 steel was cleaned ultrasonically with acetone, and then roughened by sandblasting with 24# white corundum. The surface roughness after sandblasting was Ra3.6μm.

[0049] (2) Add the prepared powder into the high-efficiency mixer for pre-mixing for 2 hours, and...

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Abstract

The invention discloses a rare earth oxide doped high temperature oxidation resisting and abrasion resisting coating for H13 steel surface protecting and a preparation method of the coating. Accordingto the method, an active combustion-high velocity air fuel (AC-HVAF) technology is adopted for spraying powder on a base body (H13 steel) to form the composite coating; and the powder comprises Cr3C2-NiCr powder and nanometer CeO2 powder, the doping content of the nanometer CeO2 powder is 2-8 wt%, and the balance is the Cr3C2-NiCr powder. The coating prepared through the method is compact in structure and uniform in distribution, a flattened structure is achieved, and the coating is closely combined with a boundary. Besides, after doping of the nanometer CeO2 powder, the tissue compactness ofthe coating is further improved, the porosity is reduced, the defects of non-molten matter, micro cracks and the like are less, better high temperature oxidation resisting performance and abrasion resisting performance are both achieved, and the high temperature oxidation resisting performance and the abrasion resisting performance of the H13 steel in the using process can be improved easily.

Description

technical field [0001] The invention relates to the technical field of high-performance cermet composite coatings, in particular to a method for preparing a high-temperature oxidation-resistant and wear-resistant coating doped with rare earth oxides for H13 steel surface protection Background technique [0002] Since the 20th century, with the continuous expansion of industrial production scale and the rapid development of technology, the requirements for long-term effective and stable operation of mechanical parts and equipment under various harsh working conditions such as high temperature and high pressure have gradually increased. However, it has been difficult to meet higher requirements through simple heat treatment. The data shows that the loss caused by equipment failure caused by the failure of key basic parts accounts for 3-5% of my country's GDP. Among them, the failure modes such as local wear and corrosion on the surface accounted for more than 80%, especially ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/129C23C4/06C23C4/02
CPCC23C4/02C23C4/06C23C4/129
Inventor 曾德长罗政邱兆国张友生
Owner GUANGDONG ZHENGDE MATERIAL SURFACE TECH
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