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Laser cladding in-situ synthesized complex carbide (Ti, Nb) C strengthened Ni-based coatings and preparation

A technology of composite carbide and laser cladding, which is applied in coating, metal material coating process, etc., can solve the problems of automobile mold wear and other problems, and achieve the effect of no pollution on the interface, good dispersion effect and uniform distribution

Active Publication Date: 2018-11-23
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: aiming at the shortcomings of existing laser cladding and the failure mechanism of automobile mold wear, a kind of in-situ synthesis composite carbide reinforced Ni-based coating and its preparation method are proposed to solve the problem of automobile mold steel surface Reinforcing questions

Method used

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  • Laser cladding in-situ synthesized complex carbide (Ti, Nb) C strengthened Ni-based coatings and preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: A laser cladding coating was prepared at a power of 2200W to obtain a coating with a smooth surface, a large height and a wide width.

[0028] (1) Substrate pretreatment

[0029] Clean the surface of Cr12MoV automobile die steel (12mm×60mm×100mm) with an angle grinder and acetone;

[0030] (2) Laser cladding

[0031] The nickel base alloy powder composition used for preparing the coating is:

[0032] C: 0.33%

[0033] Si: 3.05%

[0034] B: 1.89%

[0035] Cr: 10.01%

[0036] Fe: 5.28%

[0037] Margin: Ni

[0038] Addition of pure Cr with a particle size range of 75-105 μm to the alloy powder 3 C 2 powder, pure Nb powder, pure Ti powder and Y 2 o 3 powder, pure Cr 3 C 2 powder, pure Nb powder, pure Ti powder and Y 2 o 3 The addition amount of the powder is 8.8%, 3.9%, 2.6% and 5.1% of the mass fraction of the nickel-based alloy powder respectively. Put the powder into the ball mill and mix for 2 hours, adjust the laser cladding process parameter...

Embodiment 2

[0039] Example 2: A coating was prepared by laser cladding at a power of 2000W, and a coating with a flat surface, a small height and a small width was obtained.

[0040] (1) Substrate pretreatment

[0041] Clean the surface of Cr12MoV automobile die steel (12mm×60mm×100mm) with an angle grinder and acetone;

[0042] (2) Laser cladding

[0043] The composition of the alloy powder used to prepare the coating is:

[0044] C: 0.33%

[0045] Si: 3.05%

[0046] B: 1.89%

[0047] Cr: 10.01%

[0048] Fe: 5.28%

[0049] Margin: Ni

[0050] Addition of pure Cr with a particle size range of 75-105 μm to the alloy powder 3 C 2 powder, pure Nb powder, pure Ti powder and Y 2 o 3 powder, pure Cr 3 C 2 powder, pure Nb powder, pure Ti powder and Y 2 o 3The amount of powder added is 9%, 3.8%, 2.7% and 5.2% of the mass fraction of the nickel-based alloy powder. After the powder is mixed, it is mixed in a ball mill for 2 hours, and the laser cladding process parameters are adjuste...

Embodiment 3

[0051] Example 3: A coating was prepared by laser cladding at a power of 1800W, and a coating with a flat surface, a small height and a small width was obtained.

[0052] (1) Substrate pretreatment

[0053] Clean the surface of Cr12MoV automobile die steel (12mm×60mm×100mm) with an angle grinder and acetone;

[0054] (2) Laser cladding

[0055] The composition of the alloy powder used to prepare the coating is:

[0056] C: 0.44%

[0057] Si: 4.29%

[0058] B: 2.77%

[0059] Cr: 14.52%

[0060] Fe: 3.09%

[0061] Margin: Ni

[0062] Addition of pure Cr with a particle size range of 75-105 μm to the alloy powder 3 C 2 powder, pure Nb powder, pure Ti powder and Y 2 o 3 powder, pure Cr 3 C 2 powder, pure Nb powder, pure Ti powder and Y 2 o 3 The amount of powder added is 10%, 3.5%, 3.0% and 5.0% of the mass fraction of the nickel-based alloy powder. After the powder is mixed, it is mixed in a ball mill for 2 hours, and the laser cladding process parameters are adjus...

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Abstract

The invention discloses laser cladding in-situ synthesized complex carbide (Ti, Nb) C strengthened Ni-based coatings and preparation, and belongs to the technical field of surface treatment. The preparation steps include that firstly, the surface of Cr12MoV automobile die steel is cleaned by means of an angle grinder and acetone; and secondly, alloy powder used for laser cladding is prepared according to chemical components and placed into a ball mill to be subjected to mixing for two hours, a coaxial power feeding mode is adopted for preparing four four-layer abrasion resistant coatings on the surface of a base material, the coatings are compact in structure, uniform in in-situ strengthening phase distribution, good in dispersion effect, free of pollution on interface, and good in metallurgical bonding with the base material. The microhardness is around 700 HV, and the mechanical performance of the surface of the die steel is remarkably improved.

Description

technical field [0001] The invention discloses a laser cladding repair method for a worn automobile mold, in particular to a laser cladding in-situ synthesis composite carbide reinforced Ni-based coating and a preparation method thereof, belonging to the technical field of surface treatment. Background technique [0002] With the rapid development of the automobile industry, the number of automobiles has increased rapidly. In order to solve the increasingly serious fuel resource consumption and automobile exhaust emissions, automobile lightweight has become a trend. Studies have shown that for every 10% reduction in automobile mass, the energy consumption of automobiles will decrease. 4%-8% reduction. Therefore, reducing the weight of automobiles, producing automobiles with low fuel consumption and low emissions, and realizing energy saving and emission reduction have become important directions for the current automobile development. At present, there are two main ways to ...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C19/05
CPCC22C19/056C23C24/103
Inventor 孙淑婷符寒光平学龙
Owner BEIJING UNIV OF TECH
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