The hottest laser hardening treatment reaches new

2022-08-12
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Laser hardening treatment achieves new quality

Abstract: the common laser processing technology in the market is to select a temperature to heat the parts, and bring the heat into the steel with a certain laser feed rate. The quenching hardness finally depends on the characteristics and quality of the parts

it is guaranteed to manufacture steel thin-walled cutting tools containing 14% - 22% chromium and more than 1% carbon to control grading: it is still a new application to solve the problem of accurate "positioning". Here, because the quality of the parts is too low, and the parts have the material characteristics that the initial temperature point of martensite is near room temperature and the end temperature point is about -10 ℃, and the target hardness can be achieved above this temperature point, the quality of self quenching can not be ensured by using the traditional laser hardening process

the common laser processing technology in the market is to select a temperature to heat the parts, and bring the heat into the steel with a certain laser feed rate. The quenching hardness finally depends on the characteristics and quality of the parts

high quality laser hardening treatment is based on the variety of steel, independently analyzing the alloy composition and determining the quenching and tempering state obtained. According to the user's hardening task requirements, a wide range of processing processes are formulated. Tempering and deep cooling of sample parts or workpieces also belong to the scope of processing work. The quality assurance after hardening includes authorizing a cooperative unit to determine the processing results by all technical means such as laboratory quality appraisal, and verifying the results by metallographic grinding method

advanced research in critical situations

in critical situations, advanced research on work tasks and final quality verification is carried out together with an external material inspection laboratory. Here, inofex cooperates with the block inspection laboratory in Berlin. At the same time, this cooperation also plays a role in the research and development of products required by users, such as the reliability test of tool stability and the test of cutting ability in specific working situations. Only when the work is successfully completed through advanced research can we begin to accept the entrustment of users for laser hardening of components. LHW company has mastered two kinds of laser hardening treatment methods, namely, the common laser quenching treatment process in the market and the quenching and tempering of cutting tools with a certain laser feed rate, so as to achieve the same quality level

since LHW adopts robots to implement laser hardening, the application of laser hardening is very flexible. It only needs a small amount of preparation on the quenching and tempering of equipment parts or components to start laser hardening. Like all other laser applications, this hardening method is also equally efficient. This technology is fast, economical, independent of any form, easy to install, efficient and safe in application. Once the task is negotiated, at 24-36? The processing of a single piece of oil refining industry that needs to be transformed in the future can be completed within H. In terms of entrusted hardening processing services, the daily processing tasks within the scope of the standard are to process precision parts with small size changes, as well as large pump casings, steel rope pulleys and large female dies weighing hundreds of kilograms. In the process of high-quality hardening, in order to improve the rigidity of parts and reduce the thickness of parts to save materials, functional levels such as cutting and quality free structural stabilizer are applied. The structural stabilizer is a laser track with high intensity, which can produce a high shape rigidity and low vibration tendency in the component. This effect can be used in the component design concept and FEM analysis. At present, this achievement is only limited to individual applications and research areas, and has not yet entered the stage of promotion and popularization

laser hardening treatment can prolong the service life of parts

a good example of using laser hardening treatment process is that it can prolong the service life of knives on slaughtering equipment, for meat mincing knives, and for meat cutting knives. The peripheral speed of the cutting tool for preparing sausage raw materials can reach 700? Km/h, this kind of thin plate cutter will suffer the maximum load such as beating or vibration during its use. The main load comes from vibration, and the cutter fracture is often caused by material fatigue. Laser hardening treatment can make the soft tool body become stable and hard through laser quenching traces, so as to reduce the probability of tool damage. The test results show that the vibration quantity and duration of laser quenched cutters are much stronger than those of whole quenched or non quenched cutters

the functional hardness treatment exceeds the requirements of DIN standard

contrary to the requirements of DIN standard, the laser hardness treatment of meat cutter does not adopt overall quenching treatment, but only the dynamic display of data and curves on the blade for functional quenching and tempering. In the tool combination, the sleeve plays the role of supporting the shaft, and quenching plays the role of anti-wear protection. According to the requirements of DIN standard, the sleeve shall be subject to soft tempering to withstand the impact force. This maximum load force can be resisted by the whole tool body in a soft state, and prevent the tool from being completely damaged to cause equipment damage and material loss

the tool no longer complies with DIN regulations, but it exceeds the current technical status in function. In addition, the energy consumption required for laser hardening treatment 1. Is the running speed of the instrument 75% lower than that of overall quenching, and the processing time is also from 10? H decreases to 0.3? h。

however, the thin plate tool cannot ensure the self quenching required by the quenching process. In this case, there is a lack of quenching methods that can meet the functional requirements of the tool. For this, an immediate post cooling along the laser trace has been developed. Thus, the goal of thin-walled material orientation and rapid cooling below the martensite starting point is successfully achieved to ensure good hardening results. In this way, the wall thickness of only 1.5? Mm plate shall be well hardened

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