Laser cladding process and laser cladding repair processing system based on thermal aging treatment

Abstract

The invention provides a laser cladding process based on thermal aging treatment. The laser cladding process comprises the following steps of (1) pretreating a cladding part and a flat sample; (2) clamping the flat sample, and arranging a heating device below a chuck clamp; (3) arranging a temperature sensor near a to-be-cladded area of the flat sample for detecting the cladding temperature; (4) carrying out a single-pass laser cladding test on the flat sample, and recording the temperature range achieved by the cladding surface under corresponding cladding process parameters; (5) clamping the cladding part on the chuck clamp, enabling a temperature control system to control the heating temperature of the heating device according to the recorded temperature range, performing dynamic temperature control on the cladding part, and maintaining the overall temperature of the cladding part within the temperature interval achieved by laser cladding; (6) setting the corresponding laser cladding process parameters, and carrying out laser cladding on the surface of the cladding part; and (7) after the cladding is finished, controlling to stop heating by the temperature control system, and slowly cooling to room temperature. According to the process, the generation of cladding cracks can be reduced, and the cladding quality and effect can be improved.

Description

technical field [0001] The invention relates to a laser cladding process and device based on thermal aging treatment, which belongs to the application field of material surface engineering and laser technology. Background technique [0002] Laser cladding technology (Laser Cladding Technology), also known as laser cladding technology, has the characteristics of small heat-affected zone, low dilution rate, fast cooling and metallurgical bonding between cladding materials and substrates. It is an emerging rapid prototyping technology, so It has important application value in industries such as aerospace, automobile manufacturing, mold repair, medical treatment and chemical industry. However, the cladding layer has residual tensile stress due to uneven cooling; at the same time, due to the uneven heating of the substrate during the cladding process, the temperature gradient is large, forming a temperature difference, causing the cladding area to cool and shrink and crack, thus ...

AI Technical Summary

Problems solved by technology

However, the cladding layer has residual tensile stress due to uneven cooling; at the same time, due to the uneven heating of the substrate during the cladding process, the temperature gradient is large, forming a temperature difference, causing the cladding area to cool and shrink and crack, thus forming cladding cracks and pores. defects, induce a large amount of residual tensile stress

Currently, these deficiencies limit the practical application of laser cladding technology

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