Key Features:

• Quenching Process: The metal was heated to a high temperature and then immersed in oil, where controlled cooling was applied so as not to become excessively brittle. 
• Advantages Over Water Quenching: Oil does provide a slower cooling rate and more evenly than does water, thus reducing warping and cracking and reducing internal stresses in hard metals.
• Common Applications: Tool manufacturing (for hardened steel tools), Automotive parts (for instance gears, crankshafts), and then Aerospace parts would be the common applications where durability and strength are essential.

Oil quenching is very crucial in that it imparts to the metal the appropriate balance of hardness and toughness. In machinery and tool making, oil-quenched steels carry a longer life of usage and improved performance. In automotive and aerospace engineering, precision-hardened parts are integrated into making certain parts safer and more reliable. Solutions in quenchant oils, cooling techniques, and the alloys that have been introduced continue to enhance the capability of oil quenching in manufacturing methodologies of modern times.