Machining Performance of Cryogenic Minimum Quantity Lubrication-Assisted High-Speed Milling 2343ESR Mold Steel

Area of Science:

• Materials Science
• Manufacturing Engineering
• Tribology

Background:

• Improving machinability of advanced mold steels like 2343ESR is crucial for manufacturing efficiency.
• Dry cutting methods often lead to poor surface quality and rapid tool wear.
• Environmentally sustainable machining practices are increasingly important.

Purpose of the Study:

• To investigate the effectiveness of cryogenic minimum quantity lubrication (CMQL) in high-speed milling of 2343ESR mold steel.
• To analyze the synergistic cooling and friction-reduction mechanisms of CMQL.
• To evaluate the impact of CMQL on cutting forces, surface roughness, and tool life.

Main Methods:

• Comparative high-speed milling experiments under dry cutting and CMQL conditions.
• Systematic investigation of cutting parameters' effects on machining performance.
• Analysis of tool wear mechanisms and workpiece surface integrity through microscopic observation.

Main Results:

• CMQL reduced resultant cutting force by 15.7-25.2% and surface roughness by 14.6-29.9% compared to dry cutting.
• Defects like tearing, spalling, and microcracks on the machined surface were effectively suppressed with CMQL.
• Adhesive and flank wear of the cutting tool were significantly reduced, leading to improved tool life.

Conclusions:

• CMQL-assisted high-speed milling offers a high-efficiency, high-quality, and environmentally friendly machining solution for 2343ESR mold steel.
• The study demonstrates broad application potential for CMQL in advanced mold steel machining.
• CMQL effectively mitigates tool wear and enhances surface integrity, promoting sustainable manufacturing.