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In-situ generation ZrB2 and ZrC Ni-based cladding material, composite coating and preparation method

An in-situ generation and cladding material technology, applied in the coating process and coating of metal materials, can solve the problems of easy combustion of graphite powder, easy oxidation of boron powder, high price, etc., to reduce corrosion and corrosion rate , The effect of improving the uniformity of ingredients

Active Publication Date: 2020-02-21
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Boron powder is easy to oxidize and expensive; graphite powder is easy to burn and generates CO, CO 2 and other gases, under the condition of rapid solidification, it is easy to cause porosity, so neither of them is an ideal cladding material

Method used

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  • In-situ generation ZrB2 and ZrC Ni-based cladding material, composite coating and preparation method
  • In-situ generation ZrB2 and ZrC Ni-based cladding material, composite coating and preparation method
  • In-situ generation ZrB2 and ZrC Ni-based cladding material, composite coating and preparation method

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Embodiment

[0047] The base material is modulated 45 steel, the tensile strength σ b 630~780MPa, yield strength σ s ≥370MPa, elongation δ≥17%, impact toughness A ku ≥31J, the hardness is 207-302HBS.

[0048] Cladding materials include Ni-based self-fluxing alloy powder (Ni60A), Zr70Ni30 powder and B 4 C powder. The composition of Ni60A powder is: C 0.82wt.%, Cr 16.55wt.%, B 3.24wt.%, Si 4.5wt.%, Fe 3.82wt.%, Ni balance. The particle size of the powder is -140~+325 mesh, and the bulk density is 4.24g / cm 3 , the fluidity is 17.66sec / 50g. The particle size of Zr70Ni30 powder is -200 mesh, the purity is ≥99%, and the mass ratio of Zr element to Ni element is 7:3. B 4 The particle size of C powder is -180 mesh to +240 mesh.

[0049] Quenched and tempered 45 steel round bars were processed into (a) 30mm×15mm×10mm and (b) 30mm×30mm×10mm two sizes by using DK7740 wire electric discharge machine. Specimens of size (a) were used for single-pass cladding, and samples of size (b) were used f...

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Abstract

The invention discloses an in-situ generation ZrB2 and ZrC Ni-based cladding material, a composite coating and a preparation method. The cladding material comprises Zr70Ni30, B4C and Ni60A, wherein the mass ratio of Zr70Ni30 to B4C to Ni60A is 1:9-4:6; the mass ratio of Zr70Ni30 to B4C is 5-9:1. The Ni-based in-situ generation ZrB2 and ZrC reinforced composite coating is prepared on a steel base material with Ni60A, Zr70Ni30 and B4C mixed powder as a raw material through the laser cladding technology. The wear resistance of the prepared coating is 4.14 times of that of the base material. Through the passivation effect a Ni-based solid solution and the high chemical property stability of a ceramic phase, the prepared coating provided by the invention has the small corrosion current densityand corrosion rate, and the corrosion resistance of the prepared coating is 2.47 times of that of the base material.

Description

technical field [0001] The invention belongs to the technical field of iron and steel surface modification, in particular to an in-situ ZrB 2 Ni-based cladding material with ZrC, composite coating and preparation method. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Metal-ceramic composite materials are multi-phase composite materials with pure metal or alloy as the matrix phase and ceramic fibers and particles as the second phase. This material combines the high strength, high toughness, and good processing performance of metals with the high hardness, high wear resistance, high corrosion resistance, and high temperature oxidation resistance of ceramics, and has a goo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/03C22C32/00
CPCC22C19/03C22C32/0057C23C24/103
Inventor 于慧君赵龙杰陈传忠
Owner SHANDONG UNIV