The Study of Tool Wear in Dry Milling 300M Ultra high strength Steel

Abstract

Aiming at the problem of the rapid failure of 300M ultrahighstrength steel due to tool wear in the process of machining, the test of 300M steel in dry milling with cemented carbide coated tools was carried out. The influence law of milling parameters on tool wear was studied by range analysis. The single factor experiment was carried out with the milling speed as the only variable, and the wear forms of cutting tools were analyzed and the wear mechanism of the tool was revealed by energy spectrum analysis. The results show that the effect of milling speed on tools wear is maximal, and the effect of feed speed is smaller than milling speed and the effect of milling width is minimal. The higher the milling speed, the more the cutting tool wear and collapse. During the wear process, the tool passes through three stages, namely the coating shedding, the carbide matrix material wear and cutting edge collapse. The crater wear of tool rake face increases with the increase of milling speed and milling length. The mechanism of tool wear is abrasive wear, adhesive wear and oxidative wear.

Keywords

• 300m ultra-high strength steel
• dry milling
• tool wear
• milling speed