Cutting Data for Turning of Steel

Cutting Data for Turning of Steel is about machining, one of the most important manufacturing processes. Machining is substractive — it removes unwanted material in the form of chips from a workpiece. Material removal operations are among the most expensive. In the U.S., more than $100 billion was spent on machining in 1999. High cost puts tremendous economic pressures on production managers and engineers as they struggle to find ways to increase productivity.

Cutting Data for Turning of Steel provides machining recommendations to allow removal of more material per unit of time. It also helps improve power consumption at the roughing operations as well as end milling, boring and drilling. Machining recommendations relate to cutting speeds, feed rates, and depth of cuts. Such recommendations depend on the workpiece material properties and the cutting tool material. Workpiece materials described in this book are the most commonly used grades of carbon, alloy, stainless, tool, and maraging steels. Cutting tool materials are cemented carbides, cermets, and ceramics.

Features

• Describes hardness, tensile strength, and machinability of steels-the major mechanical properties. These properties are taken into consideration when selecting machining parameters.
• Features machining recommendations for turning that provide the cutting speed values based on Brinell hardness numbers, the depth of cut, and feed rate in relationships with the type of steel.
• Summarizes numerous calculations in five appendices.

Dr. Edmund Isakov. Ph.D., has enjoyed a long and distinguished career in metalworking. He earned his Doctor of Philosophy degree in Mechanical Engineering at the V. Bakul Institute for Superhard Materials (Kiev, Ukraine). He is known for his work in research, development and applications of cuttting tools for milling, turning and boring. Dr. Isakov has authored Mechanical Properties of Work Materials and numerous articles and papers on metalcutting. He holds several U.S. patents and numerous U.S.S.R Inventor’s Certificates pertaining to carbide and diamond tools. during nearly two decades at Kennametal, Inc., he became a noted authority on the technical analysis of cutting tools. Dr. Isakov is now an independent consulant and manufacturing sciences writer based in Florida. He is a senior member of SME

Contents

Mechanical Properties of Steel

• Hardness
• Carbon Steels
• Alloy Steels
• Stainless Steels
• Tool Steels

Cutting Tools Materials

• High Speed Steels
• Cemented Carbides
• Cermets
• Ceramics
• Polycrystalline Cubic Boron Nitride (PCBN)

Machining Recommendations

• Depth of Cut and Feed Rate
• Cutting Speeds for Carbon Steels
• Cutting Speeds for Alloy Steels
• Cutting Speeds for Stainless Steels
• Cutting Speeds for Tool Steels

Machining Power

• Metal Removal Rate
• Unit Power and Power Constant
• Calculating Required Machining Power

Appendix 1: Hardness Conversion

Appendix 2: Carbon Steels

Appendix 3: Alloy Steels

Appendix 4: Stainless Steels

Appendix 5: Tool Steels