Blade Research For Difficult-To-Cut Materials-Research Carbide Blade Of Substrate Materials And Chip Breaker For Turning Austenitic Stainless Steel

Austenitic stainless steel is the most common and difficult-to-cut materials be applicationed in the modern industrial.But cutting efficiency is not hight for this material.How effective and high- speed cutting this material is a major issue for tool manufacturing industry.An important method to solve this major issue is develop new tool material and match the appropriate tool chip-breaker.Response to this development needs,in this paper, taking paraffin manufacturing process technology,Developing a kind of carbide blade for dedicated cutting austenitic stainless steel.This paper used cemented carbide indexable inserts as study object. Trial production two kinds of substrate material and two kinds of chipbreakers for comparative study:?substrate material:One kind of Co content of 8%,WC raw material Fsss 1.3?m,Another kind of Co content of 5.5%,WC raw material Fsss 6.16?m,Both two substrate material added 2% TaC by mass percentage as an additive to improve the alloy quality.?Chipbreaker:One kind of chipbreaker main cutting edge is relatively sharp, somewhat less strength and slightly less impact resistance; another Chipbreaker main cutting edge is relatively blunt, relatively good strength and impact resistance is better.? Surface coating materials will not be covered because of the length of the article. When studying the substrate material the density?coercive force?cobalt magnetic?high temperature hardness ? rockwell hardness ? the thermal conductivity property of the cemented carbide substrate?hight and low power metallurgical examination were detected by using density tester?Coercive force measuring instrument?MCOM-3Cobalt magnetic instrument ? high temperature hardness tester ? Rockwell hardness tester and thermal constant instrument?metallurgical microscope;When studying chip breaker the blade wear and cutting force were observed by YG-2010 image measuring instrument and Piezoelectric Three-phase to dynamometer;When Simulating the blade and workpiece temperature and cutting force by using deform analysis software;When carrying on turning comparative test by used CA6140 general lathes and accessories.Blade bending strength tested by other units due to the experimental conditions.After the above experimental study, Obtaining base material properties and internal structure,Obtaining chip breaker groove structure influence for blade wear failure mechanism and cutting force.Obtaining the blade and workpiece temperature field that through cutting test is not easy to get,Obtaining what substrate with what Chipbreaker suitable for cutting austenitic stainless steel,Finally get a cost-effective coating indexable carbide inserts, partially replace similar foreign products.