Ceramic reinforced Ni-based composite coating applying to steel surface through laser cladding and preparation method thereof

A laser cladding, steel surface technology, applied in the direction of coating, metal material coating process, etc., can solve the problems of strong corrosion, alloy coating can not meet the requirements of use, etc., to achieve the effect of improving hardness and wear resistance

Pending Publication Date: 2020-02-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the face of harsh service environments such as heavy load, high stress, fast speed, and strong corrosion, alloy coatings cannot meet the requirements of use

Method used

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  • Ceramic reinforced Ni-based composite coating applying to steel surface through laser cladding and preparation method thereof
  • Ceramic reinforced Ni-based composite coating applying to steel surface through laser cladding and preparation method thereof
  • Ceramic reinforced Ni-based composite coating applying to steel surface through laser cladding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Ni60A+ZrN series

[0064] The composition of the cladding material used in this embodiment is shown in the following table 1:

[0065] Table 1

[0066] serial number Ni60A(wt.%) ZrN(wt.%) 1 90％ 10％ 2 85％ 15％ 3 80％ 20％ 4 70％ 30％ 5 60％ 40％

[0067] A method for preparing a cladding layer, comprising the steps of:

[0068] Preparation of steel specimens:

[0069] 1) The base material is processed into a sample of a certain size by using a wire electric discharge machine tool;

[0070] 2) Grind the surface of the sample to be clad with sandpaper, remove the scale, until it is smooth and polished.

[0071] 3) Place the sample in absolute ethanol and ultrasonically clean it for 30 minutes to remove surface oil. After washing, take out the samples and let them dry naturally in the air.

[0072] Laser cladding steps:

[0073] 1) According to the ratio designed in Table 1, use an electronic balance to weigh and mix various p...

Embodiment 2

[0101] Ni60A+ZrB 2 series:

[0102] The composition of the cladding material used in this embodiment is shown in Table 5:

[0103] table 5

[0104] serial number Ni60A(wt.%) ZrB 2 (wt.%)

1 90％ 10％ 2 85％ 15％ 3 80％ 20％ 4 70％ 30％ 5 60％ 40％

[0105] Ni60A+15wt.%ZrB under different process conditions 2 The cladding quality of the coating, as shown in Table 6, corresponds to image 3 .

[0106] Table 6

[0107] 3kW 4kW 5kW 150mm / min (a) (b) (c) 250mm / min (d) (e) (f) 350mm / min (g) (h) (i)

[0108] image 3 It is laser cladding Ni60A+15wt.%ZrB under different process conditions 2 The appearance of the coating, it can be seen that within a certain process range, Ni60A+15wt.%ZrB 2 The coating is continuous and uniform, the surface is flat, and the number of slag particles is small. This shows that Ni60A+15wt.%ZrB 2 The powder has good cladding formability. Under the conditions of ...

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Abstract

The invention discloses a ceramic reinforced Ni-based composite coating applying to the steel surface through laser cladding and a preparation method thereof. The ceramic reinforced Ni-based compositecoating is prepared in a mode that mixed powder of ceramic phase and Ni60A is subjected to laser cladding to be arranged on the surface of a steel test piece, wherein the mixed powder comprises the ceramic phase, with the mass fraction of 5 wt.%-45 wt.%, of ZrN, ZrB2 or Zrc and the balance Ni60A, the laser power is 3-5 kW, the scanning speed is 200-400 mm / min, the spot diameter is 3-4 mm, the preset powder thickness is 0.5-1.5 mm, the argon flow rate is 5-15 L / min, and the overlap rate is 30%-50%. The Ni60A+ZrN coating has the high abrasion resistance, the abrasion resistance of the Ni60A+10wt.% of ZrN coating is increased to 9.67 times of that of a substrate under the conditions of the laser power of 3 kW and the scanning speed of 300 mm / min, and the abrasion resistance of the Ni60A+30wt.% of ZrB2 coating is increased to 4.14 times of that of the substrate under the conditions of the laser power of 3 kW and the scanning speed of 300 mm / min.

Description

technical field [0001] The invention specifically relates to a laser cladding ceramic reinforced Ni-based composite coating on a steel surface and a preparation method thereof. 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] 45 steel is a common medium-carbon structural steel with high strength and good cutting performance. Therefore, it is widely used in the manufacture of connecting rods, bolts, gears and shaft parts. However, in the harsh service environment, 45 steel parts are prone to wear and corrosion, leading to failure and economic loss. The use of surface modification technology to prepare protective coatings can effectively improve the wear resistance and corr...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C19/03C22C32/00
CPCC22C19/03C22C32/0047C23C24/103
Inventor 于慧君赵龙杰陈传忠
Owner SHANDONG UNIV
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