چكيده به لاتين
Abstract:
Alloy steel AISI4142 is one of the most widely used steels in various industries, especially in oil, gas and petrochemical industries and is widely used in high temperatures and high pressures, such as the manufacturing of shafts, pinions, and spindles, bolts and nuts, gears such as supercharger drive gears and pressure vessels are used. This alloy steel is a sub-group of low-alloy steels with moderate carbon content. Machining problems of this steel as well as problems of wear and tool life, surface roughness are discussed in this study.
In this research, investigated effect of machining parameters such as cutting speed and feed rate using cutting fulid (wet method) and without using cutting fulid (dry conditions) and using coated carbide and CBN cutting tools for alloy steel AISI4142 machining. The purpose of this research and choosing parameters is to reduce costs, save time, reaching more reliable results and obtaining precision alongside accuracy and improvement of process efficiency.
In the study, using response surface method and by Minitab software, analyzes output parameters resulting from the machining process such as tool wear, surface roughness, machining time, formation and distribution pattern of chip and the optimal values for tool wear, surface roughness and machining time by coated carbide cutting tool in wet mode were with cutting speed of 122 m/min and feed rate of 0.14 mm/rev and for CBN cutting tool in wet mode were with cutting speed of 161 m/min and feed rate of 0.12 mm/rev. After comparing these two optimal points, it was revealed that CBN cutting tool has better desirability in output parameters, so that using this type of tool in the alloy steel AISI4142 machining, the final quality of the workpiece surface is more appropriate and also the process of tool wear is less.
Keywords: Alloy steel AISI 4142, Turning, Response surface method, Tool wear, Surface roughness.
