1. Research Purpose Using 3kW semiconductor laser equipment, laser alloying by adding submicron B4C ceramic phase to improve the surface hardness and wear resistance of 45 steel, has wide engineering significance. 2. Research methods The test equipment uses the surface treatment and remanufacturing system of the 3KW semiconductor laser robot produced by WISCO Huagong Laser Company. The laser cladding process is: laser power 2KW, scanning speed 30mm / s, spot size 3mm, overlap rate 50% The preset thickness is 100 microns. The microstructure of the cladding layer was analyzed using the XJL-03 microscope, and the micro hardness of the cladding layer was measured using the HVS-1000A Vickers hardness tester. The load was 0.2kg during the measurement, the loading time was 10s, and the cladding layer was measured at 5 points at different depth The values ​​are averaged and plotted as a cross-sectional hardness distribution. 3. Test results Figure 1 shows the cross-sectional morphology of the laser alloyed layer. The strengthening zone is composed of alloying zone, quenching zone and heat-affected zone. The typical metallographic structure is shown in Figure 2. The structure is characterized by the distribution of submicron ceramic phases on fine dendrites. Fig.1 Cross-sectional morphology of laser alloyed layer Figure 2 Changes in the structure of the alloyed layer from the surface to the substrate Figure 3 is the lateral hardness distribution of the alloyed layer. As can be seen from the figure, the hardness in the alloyed layer reaches HV0.2 1100, the layer depth is about 200 microns, from the alloyed layer to the matrix, the structure transitions from full martensite From half martensite to finally matrix, the hardness also gradually decreased. Figure 3 Lateral hardness distribution of alloyed layer 4. Conclusion When high-power semiconductor laser is used for laser alloying, the laser and submicron B4C phase have extremely high coupling efficiency, high alloying efficiency, uniform alloying layer, hardness increased to HV0.2 1100, which is 45 steel wear resistance Ascension provides a way. We are specialized Bathroom Wipes manufacturers & suppliers/factory from China. Wholesale Bathroom Wipes with high quality as low price/cheap.Each category represent their own group of specific products geared towards specific needs and results.All private label products are [made-to -order"according to customers requirements and market needs. Look forward to your cooperation! Bathroom Wipes Bathroom Wipes,Daily Household Cleaning Wipes,Biodegradable Flushable Wipes,Bathroom Disinfection Sanitary Wipes,Bathroom Cleaning Wipes,Bathroom Cleaning Wipes Tissues Shaoxing Extra Beauty Hygienics Co.,Ltd , https://www.cnextrabeauty.com
