Method for heat treatment of 65Mn steel-made electronic scale sensor elastic body

Abstract

The invention discloses a method for the heat treatment of a 65Mn steel-made electronic scale sensor elastic body, which completes the heat treatment on a heat treatment continuous production line and which comprises the following specific steps: stamping molding material of the 65Mn steel-made electronic scale sensor elastic body is heated to 830 DEG C, quenching the material for 5 minutes in hot oil at 100 DEG C after heat preservation is performed for 15 to 30 minutes, then cleaning and drying the material; subsequently heating at 400 DEG C and preserving the heat for 80 minutes, followed by tempering; after the tempering, rapidly hydrocooling and drying, and detecting product; in the method according to the invention, the tempering temperature is raised to 400 DEG C, the resultant hardness is in a range of 43+ / -1.5, so the demand of linearity can be met; plasticity and toughness of parts are enhanced by increasing the proportion of tempered sorbite; the method according to the invention rapidly hydrocools the material after tempering to prohibit harmful impurity elements such as P, S O, etc. in the material from grain boundary segregation, thereby suppressing temper brittleness.

Description

technical field [0001] The invention relates to the field of metal materials and heat treatment, in particular to a heat treatment method for an elastic body of a 65Mn steel electronic balance sensor. Background technique [0002] Generally, 415 and 417 elastic bodies of electronic scale sensors made of hot-rolled coils are used in engineering. The existing production process is: stamping forming-heat treatment (oil cooling quenching after heating at 850°C + tempering at 380°C for 80 minutes) Air cooling) --- fatigue life test --- product quality inspection - electroplating finished product --- fatigue life test. [0003] Existing problems: In the process of mass production of elastomer 415 and 417, no matter after heat treatment or in the finished product, samples are taken for fatigue life test, the result is that the life of some products does not meet the requirement of 18,000 times, and the fatigue The number of lifetimes is scattered, and the data ranges from less tha...

AI Technical Summary

Problems solved by technology

[0003] Existing problems: In the process of mass production of elastomer 415 and 417, no matter after heat treatment or in the finished product, samples are taken for fatigue life test, the result is that the life of some products does not meet the requirement of 18,000 times, and the fatigue The number of lifetimes is scattered, and the data ranges from less than 5000 to more than 18000 times

Scanning electron microscope fracture analysis results show that most of the fractures are intergranular fractures, so the crack growth speed is fast and the fatigue life is short

It is caused by insufficient toughness and temper brittleness