Metal powder and diamond powder wettability of different characteristics, in order to guide the choice of metal powder system

Diamond powder compacts in the role of high-power CO2 laser sintering process . Combined with diamond powder and metal powder bonded microscopic analysis of the state introduced the metal powder and diamond powder infiltrating the different characteristics of the metal powder system to guide the selection and design . Established a  synthetic diamond  powder sintering laser power and scanning speed with the relationship between the basic framework to facilitate the process parameter selection , design and optimization. Process Study showed that: ① sintered in a non- protective  cutting tools  Ti powder compacts is more susceptible to oxidation , powder for powder wettability is poor, wear resistance is lower. ② amount of laser power increases ( amount of the scanning speed decreases ) , is conducive to the densification of sintered parts and strong carbide forming elements on the diamond powder infiltration , but if the energy of the laser input  abrasive grinding  a certain threshold will result in fine powder burning . When the spot diameter is 8.5mm , the laser power of 550W, scanning speed 1100mm/min under sintering conditions , powder sintering tool has the best performance. ③ The same process parameters , since the laser heating and compacts composition non-uniformity , surface state powder and metal binding properties and differences . For the laser sintering process in a variety of different phenomena , the sintering mechanism were studied intensively .