Tools Performance Of 22mnb5 Boron Steel Cutting Tools During Turning Machining With Aluminium Alloy (AA 6061)

Mohamad Saufi, Aina Nadia (2020) Tools Performance Of 22mnb5 Boron Steel Cutting Tools During Turning Machining With Aluminium Alloy (AA 6061). Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

22MnB5 boron steel is a new material that possess high hardness and categorized as Ultra High Strength Steel. This project focused on the assessment of the tool life and tool wear mechanism during machining aluminum alloy (AA 6061) with 22MnB5 boron steel cutting tools under dry and wet conditions. 22MnB5 boron steel that prepared in the form of metal sheet tool was cut into round shape using laser cutting machine. The thickness of the 22MnB5 boron steel was set at 2.6 mm with diameter 12 mm according to the RNGN 120300 cutting tool designation. Machining test were held at constant 40 seconds machining period with the 100-500 m/min cutting speed , 0.1 mm/rev feed rate and 0.5 mm depth of cut. The results show that 22MnB5 boron steel capable to machine AA 6061 with at the c utting speed of 100-500 m/min w ith the too l wear demonstrated stabilized value between 200-350 m/min. For dry cutting, the tool wear varied from 0.15 to 0. 27 mm while for wet cutting, the tool wear reduced to the range of 0.08-0.1 8 mm. Wear formation dominated wit h the formation of built up edge for dry cutting. Whereas, for wet cutting , wear formation appeared to be adhesive wear with minimum effect of built-up edge formation. This study presents the feasible application of 22MnB5 boron steel as cutting tool for machining low strength materials.

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