Is it reasonable to change the customer's process requirements?

The change is mainly about the hardness of the core, and the control of the hardness of the core has a great relationship with the raw materials and has nothing to do with the quenching process. If there is no requirement for the amount of ferrite in the center, sub-temperature quenching can be considered, and ferrite is precipitated in the center first and then quenched, so that the hardness of the center reaches, but the service performance decreases.