Research On Wear Simulation And Wear Model Of Micro-Textured Tool Cutting GH4169 In Spray Cooling

Nickel-based superalloy GH4169 has excellent performance such as high strength,high hardness,corrosion resistance and high temperature resistance.GH4169 usually used to manufacture high-temperature and wear-resistant parts.GH4169 is difficult to machine the material.When using ordinary tools to cut,it will often cause serious wear or even edge collapse in a short time.In order to reduce the tool wear when cutting nickel base superalloy,this paper designs and processes concave micro texture tools.At present,a lot of scholars at home and abroad mostly conduct qualitative analysis on the wear of micro textured tools,while quantitative analysis is less.In this paper,the cavitation micro-texture tools are used to carry out the wear simulation analysis and cutting test on nickel-based superalloy in the condition of spray cooling,and the wear prediction model of the cavitation micro-texture tool is built by combining the test and simulation.The main research contents are as follows:(1)According to the principle of bionics,the micro-textures of round pits and square pits were designed on the rake face of cemented carbide tools.By analyzing the wear area of the micro textured tool,the reasonable micro texture area and the range of micro texture parameters were designed,and the cemented carbide micro textured tool was machined.(2)DEFORM software was used to simulate the cutting of the designed pit micro-texture tool in the condition of spray cooling,and the influence of micro-texture morphology on tool wear was analyzed according to the simulation results.Under the condition that other micro texture parameters are certain,the pit depth and length of the micro texture were changed,and the micro texture parameters with the minimum wear amount of the micro texture tool were obtained by simulation results.Under the condition of constant cutting depth and feed,the cutting simulation of pit micro-texture tool was carried out by changing the cutting speed,and the influence of cutting speed on micro-texture tool wear was analyzed.(3)The empirical models of bonding wear,diffusion wear and abrasive wear of texture-free tools were constructed.Then the relationship between micro-texture parameters and wear model was analyzed by using the simulated data of pit micro-texture tools.Thus,the bond wear model of the pits micro texture tool reflecting the pit side length or the pit diameter and the abrasive wear model of the pits micro texture tool reflecting the pit depth were constructed.According to the simulation data,the unknown parameters in the empirical model were solved by MATLAB software.(4)The cutting experiment was carried out with the pit micro-texture tool,and the data of cutting force and cutting temperature are measured by the test equipment.The wear area of the concave micro-texture tool was calculated by the micro-element method to verify the prediction model of abrasive wear and bond wear of the concave micro-texture tool.