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A device for high-frequency vibration rolling to strengthen laser cladding layer and its application method

A technology of laser cladding and high-frequency vibration, which is applied in coating, metal material coating process, etc., can solve problems such as high economic cost and difficult machining, achieve uniform solute, short transmission path, and reduce segregation and defects the effect of

Active Publication Date: 2022-06-28
CHANGCHUN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method needs to be machined before high-frequency rolling. Due to the generally high hardness of the cladding layer, machining is relatively difficult.
The whole process includes laser cladding, mechanical processing, high-frequency rolling, and the economic cost is relatively high

Method used

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  • A device for high-frequency vibration rolling to strengthen laser cladding layer and its application method
  • A device for high-frequency vibration rolling to strengthen laser cladding layer and its application method
  • A device for high-frequency vibration rolling to strengthen laser cladding layer and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The substrate of the cladding sample is polished and cleaned with metallographic sandpaper. The substrate of the sample is H13 steel with a specification of 6mm×15mm×30mm, and the cladding material used is Ni60+30%Wc powder. The sample is installed on the cladding equipment, and the parameters of laser cladding are as follows: the laser power is 3000W×70%; the scanning speed is 0.06mm / s; the speed of the powder feeder is 0.8rpm; The defocus amount is 12mm; the vibration frequency is 20kHz; the pressure rolling force is 10N; The experimental results are attached Figure 8 The physical map of the cladding sample prepared in this example; attached Image 6 The metallographic diagram of the coating prepared in this example shows that the Ni60+30%Wc coating has uniform composition distribution, uniform and dense grains, no cracks, no pores and shrinkage holes, and the average hardness can reach 800HV, the maximum hardness difference is less than or equal to 5HV.

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Abstract

The invention relates to a device for strengthening laser cladding layer by high-frequency vibration rolling and its use method, which belongs to the field of metal material surface strengthening. The device includes a laser cladding system and an ultrasonic rolling system. The laser cladding system includes a robot arm and a laser Cladding head, ultrasonic rolling system includes ultrasonic rolling system bracket, ultrasonic vibration device and pressing roller, etc. Ultrasonic rolling is carried out while the laser cladding layer is formed, and the rolling acts on the edge of the molten pool. The ultrasonic vibration applied to the pressing roller can refine the grains of the cladding layer, optimize the fluidity of the metal in the molten pool, make the distribution of the structure uniform, the bubbles are easy to escape, and reduce the microscopic defects. Rolling in the action area can not only refine the surface grains of the semi-solidified or just solidified cladding layer, transform the residual tensile stress into residual compressive stress, improve the comprehensive performance of the cladding layer, but also make the cladding layer The surface of the layer is smooth and clean, which can meet the surface quality and size requirements of most parts.

Description

technical field [0001] The invention belongs to the field of metal material surface strengthening, in particular to a method for strengthening a laser cladding layer by high-frequency vibration rolling. Background technique [0002] Laser cladding technology is to use high-energy laser beam to rapidly heat up the powder of specific performance components and the surface layer of the matrix to melt, and form a molten pool in the spot area. Surface coating, thereby improving the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical properties of the material surface. This technology has been widely used in many fields such as material surface modification, remanufacturing engineering and additive manufacturing. [0003] Due to the uneven energy distribution of the spot formed by the high-energy laser beam on the surface of the workpiece, the thermal properties of the base material and the cladding material are quite different. The gradie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/10C23C24/10
CPCC23C24/103C22F1/10
Inventor 张海峰沈文博赵昌龙
Owner CHANGCHUN UNIV
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