Rapid Prototyping Mo-Cu Alloy Parts Post-processing Technology And Its Mechanism Research

Molybdenum copper composite materials have enough high temperature strength, a verygood high temperature corrosion resistance and burn gas arc corrosion, plus good thermalshock resistance, civil and military aspects in a wide range of applications, so rapidprototyping molybdenum copper alloy parts is of high value for study. This article focuses onrapid prototyping molybdenum copper alloy parts of high temperature sintering and meltpermeability process.This paper focuses on rapid prototyping molybdenum copper alloy parts of hightemperature sintering and melt permeability process. Put forward a kind of rapid prototypingtechnology based on the preparation of copper composite molybdenum/new method.Choosethe process of laser rapid prototyping process, through the ball mill in homemade inmolybdenum powder and organic materials will be mixed ball mill, the coated molybdenumpowder, molybdenum powder coated and laser forming into a molybdenum copper alloynozzle parts, then laser in vacuum sintering furnace von berg systeme within the sinteringtemperature and the sintering defatted, get a can of high temperature sintering, have certainthe form sex of the SLS part.Put forward the high temperature sintering molybdenum skeleton combined withpermeability of copper von berg systeme post-treatment technology, get molybdenum/coppercomposite material sample.Through the sintering atmosphere in reduction of a hightemperature sintering experiment, get a significant increase of density and have certain andmechanical properties of high temperature sintering pieces. Based on the test of hightemperature sintering process for a thorough theoretical study:(1) High temperature sintering process of molybdenum sintering driving force, sinteringmechanism were discussed thoroughly, think in driving force under the function of hightemperature molybdenum powder sintering process bulk density and grain boundaries diffusion is mainly spread the diffusion mechanism; Through the simulation maps forsintering process analysis, thought the sintering process experienced particle density betweenthe sintering neck grew up, the space of round disappear, the merger of three grains grew upprocess, and denser process is basically a hole of and disappear in action.(2) In the volume of the diffusion mechanism established on the basis of themolybdenum powder of high temperature sintering mathematical model, through the analysisof the model is obtained and the process parameters and the relationship between the densityof sintering, in a related process is given provides theory to help.(3) For high temperature sintering one of the melting process of copper permeability test,results got to meet the performance requirements of molybdenum copper alloy nozzle parts.Copper parts of molybdenum microstructure is analyzed by molybdenum copper is a "falsealloy" the judgment, and related research results are consistent. Based on the test results,established the molybdenum high temperature sintering metal frame permeability of the meltcopper mechanism model, and through the analysis of the forces mechanism modelestablished the mathematical model of the process of molten permeability, and gives themethod of calculating the relevant process parameters, and gives the corresponding processparameters and the depth of molten permeability of the relationship, for relevant processstudies for the theory to help. On the basis of theoretical analysis, through the analysis of theoptimal control method of molybdenum copper a performance.