レーザークラッディング technology, known for its efficiency and precision in surface repair and strengthening, has shown great potential in the field of chemical equipment repair. However, the practical application of this technology still faces a series of technical and control challenges that limit its widespread use in chemical equipment maintenance. This article systematically reviews the main technical bottlenecks of レーザークラッド in chemical repairs and discusses the causes and possible solutions.

1. Complex and Variable Process Parameters, Difficult Process Control

In chemical equipment repair, the quality of レーザークラッド is highly dependent on the proper configuration of process parameters. Key factors such as laser power, spot size, scanning speed, powder feed rate, preheating temperature, and overlap rate collectively determine the microstructure and overall performance of the cladding layer. However, these parameters interact strongly, creating a highly coupled, multi-variable, and nonlinear system.

Currently, most companies still rely heavily on experience and trial-and-error methods to determine the optimal process window for レーザークラッド repair, lacking unified theoretical models or standardized guidelines. For example, different materials used in chemical equipment, such as stainless steel, nickel-based alloys, and titanium alloys, require specific adjustments to thermal input and cooling rates during レーザークラッド. Without these adjustments, it is easy to encounter poor bonding or structural defects. Therefore, real-time monitoring and closed-loop control of the レーザークラッド process are essential to improve its applicability in chemical repairs.

2. High Sensitivity to Cracking in Cladding Layers, Affecting Repair Quality and Service Safety

One of the primary obstacles to the broader adoption of レーザークラッド in chemical equipment repair is the frequent occurrence of cracking in the cladding layer. Cracks typically result from the high temperature gradients and rapid solidification behavior during the cladding process. When the laser interacts with the workpiece surface, the cladding material and base material rapidly melt and then cool. Due to differences in thermal expansion coefficients and elastic modulus, significant residual tensile stresses are generated within the cladding layer during cooling.

If these stresses exceed the material strength limit of the cladding, cracks will form. These cracks not only reduce the fatigue life of the repaired part but also become a source of stress corrosion and crack propagation in chemical corrosive environments, severely compromising the safety of equipment. Therefore, preventing cracks in レーザークラッド layers is a key task in improving the repair outcomes for chemical equipment. By optimizing the cladding process path, introducing intermediate gradient layers, and implementing preheating and post-heat treatment, stress concentration can be mitigated, enhancing the crack resistance of the cladding layer.

3. Conclusion and Outlook

Despite the challenges such as difficult process control and high crack sensitivity in レーザークラッド for chemical equipment repairs, there is still significant room for improvement and potential for application. With the continuous development of sensing technologies, process modeling, and intelligent control methods, レーザークラッド technology holds great promise for the future. By building comprehensive レーザークラッド process databases, developing specialized alloy powders, and advancing online monitoring and adaptive control system integration, we can promote the standardization, intelligence, and scalability of レーザークラッド applications in chemical equipment repair. This will provide reliable technical support for the longevity and safe operation of chemical industry equipment.