Cladding die repair technology by laser coaxial and synchronous power feeding method

Abstract

The invention discloses a cladding die repair technology by a laser coaxial and synchronous power feeding method, which is characterized in that model data of a die repair area is imported, computer programming is utilized to plan the repair path, and the way of laser coaxial and synchronous power feeding cladding is adopted to accurately repair the die, which can achieve automatic production, andthe die can be directly used after repairing; the repaired die can achieve 80% of new product performance, which greatly shortens repair cycle and reduces maintenance cost. The cladding die repair technology by the laser coaxial and synchronous power feeding method has the advantages that the energy of the laser itself is stable, the heat affected zone of the substrate is small and the technologyis clean and environmentally friendly; in addition, the microstructure of the cladding repair layer is fine, and deformation is less likely to be generated after repairing the microscopic defects oflacking parts, thereby solving the problem that many conventional methods cannot process or are difficult to process, and easy achieving automatic rapid repair of workpiece, which greatly increase production efficiency and improve processing quality.

Description

technical field [0001] The invention relates to the technical fields of metallurgy, mold processing and laser cladding, in particular to a cladding mold repair process using laser coaxial synchronous powder feeding method. Background technique [0002] Since the 1980s, my country's mold industry has developed rapidly. According to the statistics of "National Professional Mold Factory Basic Situation" compiled by the Management Committee of my country Mold Industry Association, the demand for molds in my country has grown at a rate of more than 15%, which is higher than the average value-added of domestic GDP. More than doubled, the development is very active. At present, the main problem of hot work molds in our country is that the service life is relatively low. Basically, they need to be overhauled after one month of use. This is also a main reason why our country cannot compete with advanced mold industry countries. [0003] Traditional mold repair technologies include we...

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Problems solved by technology

At present, the main problem of hot work molds in our country is that the service life is relatively low. Basically, they need to be overhauled after one month of use. This is also a main reason why our country cannot compete with advanced mold industry countries.

[0003] Traditional mold repair technologies include welding, thermal spraying, EDM deposition, etc., but these traditional repair technologies have certain problems: Among them, welding repair has a large amount of heat input, and the large heat-affected zone will easily lead to coarse crystals of the base material and large deformation of the mold ; The energy of thermal spraying repair technology is not concentrated, it is easy to be distorted and cracked, the coating material and the substrate have physical adhesion and metallurgical bonding at the same time, the porosity is high, and the uniformity is poor; although the electric spark deposition has a good bonding force with the substrate, but Repairs are thinner and less uniform

However, due to the characteristics of arc welding itself, the microstructure and grains in the steel after welding are relatively coarse and the mechanical properties are poor, which cannot well meet the requirements of the mold. In addition, the arc has a high heat input, and the heat-affected zone of the base material is large. , the mold is prone to deformation under the action of thermal stress, and the repaired mold needs to be re-heated before it can be used online

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