| A high speed steel tool is a tool that is more tenacious than a regular tool and is easier to cut.Most of the tools used in the production of mechanical industry are used to cut the iron material.The better the quality and quality of the tool,the greater the proportion of the market.At present most of the high speed steel with its unique technology and performance has been occupy the important position in the market,but studies have found that in the traditional manufacture process of high speed steel cutter is difficult to effectively improve machining accuracy limit.Magnetization processing technology is a means of magnetization frequency,magnetic field intensity,magnetization time as parameter and change.However,although magnetic field assistance has many advantages in processing,there are still a few shortcomings.High speed steel cutter with drilling or cutting speed,cutting or drilling effect is often unsatisfactory,after cutting the workpiece size can not meet the need of process requirement,this needs us to explore how to improve the performance parameters of high speed steel tools.Ion sputtering coating technology is widely used in the preparation of various functional films,as well as improving wear resistance,corrosion resistance and oxidation resistance of mechanical parts.Ion sputtering and magnetization in the condition of single reinforced high speed steel,the advantages are obvious,but still some deficiencies.Therefore,the effect of the composite hardening treatment on the performance of high speed steel is studied in this paper.This topic experiment materials using W6Mo5Cr4V2 HSS cutting tools,the use of simple homemade magnetizing device of magnetic treatment,high speed steel tools.First,the magnetization parameters on the cutting tool surface hardness and microstructure of influence;Second,in order to obtain the optimal sputtering coating parameters under the complex and changeable process conditions,the experiment of sputtering coating TiN film layer under different coating parameters was carried out.Based on matrix in the process of the magnetization,ion sputtering deposition,again,and then study on experiment in its matrix composite surface parts,magnetic treatment on the basis of the research tools in sputtering coating the surface of the friction and wear properties and microstructure changes.In the sputtering ion to taken by the orthogonal experiment parameter range,through the experiment improve W6Mo5Cr4V2 HSS cutting tool coating binding force the optimizationof process parameters for the substrate negative bias voltage 80 v,nitrogen partial pressure0.25 Pa,deposition time 60 min,deposition temperature 250 ℃,arc current 65 a.The structure and morphology of high speed steel materials were observed by means of metallographic microscope,and the mechanism of improving the drilling performance was investigated by cutting experiments.Test results show that the high speed steel cutting tools after magnetization treatment in advance to reduce friction and wear has a great influence,but also for after pre magnetic coating composite tool hardness also has a lot of improvement,in this experiment,the magnetization treatment parameters of 15 hz,least amount of tool wear.45 # steel in high speed steel drill bit drilling experiment,after dealing with the magnetic coating composite of drill tool in machining surface quality and compared with the untreated surface quality after a lot of optimization,the workpiece surface roughness to reduce the range of 26.5% ~ 26.5%,and after the workpiece surface quality of the composite treated bit have larger changes,experiment set the process parameters for the magnetic field frequency10 hz,magnetization time for 30 s;Substrate negative bias voltage 80 v,nitrogen partial pressure 0.25 Pa,deposition time 60 min,deposition temperature 250 ℃,arc current 65 a,the workpiece surface quality is best. |
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