It is considered that the residual stress is different as comparing the normalization and the quenching and tempering.

The catenary suspension furnace for quenching and tempering of the crankshafts has been successfully developed,and thus main heat treatment equipment has been renewed.

Main influencing factors on quenching and tempering hardness of ZG310-570 casting steel axle were presented.

Analysis of influencing factors on the technology in brown rice conditioning;

A new scientific simple and economical technique of brown rice conditioning by ultrasonic wave humidifying device is introduced in this paper.

In this paper,the effects that size reduction of the raw material,the conditioning temperature,the post-cooking time,the conditioning moisture content and the compressing ratio of the die on the durability for the aquatic pelleted feed were studied.

The research results show that with hardening and tempering process, the friction coefficients of 45# steel and 40Cr are almost equal,but the wear mass loss of 45# steel is lower than that of 40Cr,if the intensity is fit and the shape of work piece is not complex,45# steel is advised;with quench an.

Based on the basic mechanical theory and practice,and on the needs in the performance of petroleum mechanical products used in oil recovery ,we raise a method to cool the long metal tube evenly after the hardening and tempering.

The mechanism and method of wheat tempering were outlined.

The application of PLC in the production line of steel bottle tempering ,and systematic request and total architecture mainly are described.

This paper stresses the adoptable method of quantitative regulation and qualitative regulation, explains the way of comprehensive use of the geotherm.