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Improvements in or relating to case hardening
Improvements in or relating to case hardening
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机译:案例强化或与案例强化有关的改进
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摘要
The process of this invention comprises placing a ferrous material in a pit furnace and heating the material to a temperature of from 550 DEG C to 600 DEG C in an atmosphere comprising more than 50% by volume ammonia, up to 10% by volume of an oxidising gas and an inert carrier gas for a sufficient time to achieve the desired case depths, and produce materials having case depths, hardnesses and profiles, fatigue strengths and core strengths comparable with those obtained by the classical gaseous nitriding process without the disadvantages of the classical gaseous nitriding process. IMAGE
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