Please explain what heat treatment should be carried out for the piston rod and hammer of shock absorber in the internship.

1, the working condition of the piston rod of the shock absorber is to bear tension and pressure repeatedly, and sometimes it will bend and impact, which requires not only strength and hardness, but also toughness. In a word, it needs good comprehensive mechanical properties, so it must be tempered. Namely quenching and high-temperature tempering to obtain tempered sorbite structure.

2. The working condition of the hammer is repeated pressure and impact, which requires strength, hardness and certain toughness and elasticity, so it needs to be quenched and tempered at medium temperature to obtain tempered troostite structure.