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20 sie 2023 · The heat treatment of 4140 steel typically involves a combination of processes, including annealing, normalizing, quenching, and tempering. Each step plays a crucial role in transforming the steel’s microstructure and optimizing its mechanical properties.
ASTM SAE 4140 (AISI 4140 steel) is Cr-Mo series low alloy steel, mechanical properties, heat treatment, rockwell hardness, welding, equivalent material uses.
31 maj 2011 · Customer is asking for gas nitride to get its anti galling properties and corrosion protection. Does the gas nitride thru harden or just surface harden? Do in need to use prehard 4140 material. Or will the nitride work on soft 4140? Do the part dimensions "grow" or "shrink" during heat treat?
Nitrided and WCC-coated AISI 4140 alloy steel is predicted to be the best suitable material for the bearing materials. Keywords AHP Entropy method VIKOR method results. Introduction.
The SECO/WARWICK Heat Treating Data Book contains information about heat treating metals. This book is not intended as a text, but rather as a collection of frequently used reference data to serve persons interested in heat treating technology.
SAE 4140 steel is generally heated to 850℃-900℃ and then cooled in air. Normalizing cools faster than annealing. By normalizing aisi 4140 steel, a more uniform grain structure can be achieved, improving the mechanical properties of the steel while maintaining a certain toughness.
4140 hardened and tempered bar can also be successfully nitrided, giving a surface hardness of up to Rc 60. Nitriding is carried out at 490 o C - 530 o C, followed by slow cooling (no quench) reducing the problem of distortion.
