ROCHO INDUCTION develops the Crankshaft Journals Induction Hardening Technology Process

ROCHO INDUCTION leads the way in crankshaft hardening technology and offers the crankshaft hardening equipment. Our engineers have 12 years of experience in crankshaft production and have determined the optimum process parameters through crankshaft deformation control, new inductor design and manufacture, and rounded quenching tests to meet the requirements of hardened layer depth and uniform hardened layer, improving the fatigue strength of the crankshaft.

The crankshaft is the heart of the engine, and the quality of the crankshaft directly affects the quality of the whole automobile. Car engine crankshaft journals usually use medium frequency induction quenching process, FAW Group in the crankshaft surface heat treatment mainly using rotary quenching technology, the main shaft neck, connecting rod neck, flange and thrust surface surface treatment, this process has more than twenty years of history. With the progress of science and technology, people's requirements for crankshaft heat treatment are becoming higher and higher.

Crankshaft fracture is mostly fatigue fracture, and fatigue source is located in the crankshaft under the greatest force of the connecting rod neck R corner, so the crankshaft journal after induction quenching process, which can improve the hardness of the journal, increase its wear resistance, and journal corner quenching, crankshaft fatigue strength increased significantly, so its fatigue fracture possibility is greatly reduced accordingly. In addition, the crankshaft blank is stress relieved to effectively eliminate the stresses generated by the forging process, resulting in a reduction in subsequent cold working stresses, a release of pre-quenching stresses and a significant reduction in post-quenching deformation.

There are two ways to improve the fatigue strength of the crankshaft: one is to select different materials, such as alloy materials instead of 45 steel; the second is to use different processes, such as induction quenching of 45 steel crankshaft round corners, crankshaft round corners for rolling, crankshaft overall nitriding. The test proves that the round corner induction quenching crankshaft has the highest fatigue strength (996MPa), round corner rolling crankshaft fatigue strength second (890MPa), nitriding crankshaft third (720MPa).

ROCHO INDUCTION developing the technology of crankshaft corner induction hardening, a technology that requires only additional inductors and processes, with minimal investment and quickest results, making it the most economical and effective way to improve the fatigue strength of crankshafts. The technology provides 100% power when heated on the inside of the crank and 60% (or 70%) power when heated on the outside of the crank, and increases (or decreases) by a certain amount for every 15° angle of rotation of the crankshaft. Contact us to get the technical solutions for crankshaft quenching.