【摘 要】
：
To study the mechanics of work-hardening and annealing-softening,a series of experiments were conducted on samples of 304 austenitic slainless steel sheets.In a
【机 构】
：
College of Mechanical and Electrical Engineering, State Key Laboratory of Automotive Safety and Ener
【基金项目】
：
the Foundation for Fostering Outstanding Talents of Beijing,China
论文部分内容阅读
To study the mechanics of work-hardening and annealing-softening,a series of experiments were conducted on samples of 304 austenitic slainless steel sheets.In addition,transmission electron microscopy (TEM),scanning electron microscopy (SEM),and tensile testing were carried out to study changes and mechanisms of the stainless steel structures and properties dttring work-hardening and annealing-softening.The results indicate that annealing at low temperatures (100-500 ℃) can only remove partial residual stresses in the sample and the softening via annealing is not obvious.Bright annealing and rapid cooling in a protective atmosphere can completely soften the cold-worked material.In addition,the low-temperature sample without a protective atmosphere only has a little oxidation on the surface,but at higher temperature the oxidized layer is very thick.Thus,high-temperature annealing should include bright annealing.
其他文献
From the viewpoints of environmental conservation and energy efficiency,seawater-source heat pump system (SWHP) to provide district cooling and heating is appli
To obtain high-quality dissimilar weld joints,the processes of metal inert gas(MIG)welding and tungsten inert gas(TIG)welding for duplex stainless steel(DSS)and
Experiment was conducted to determine the effect of different nitrogen levels on four bread wheat varieties (Triticum aestivum L.) viz. Inqilab-91, Daman-98, De
D,L-lactide was prepared from D,L-lactic acid by means of polymerization and depolymerization at low vacuum level.Morpholine-2,5-dione (MD) was synthesized from
The method for calculating wall surface heat storage coefficient was introduced,and the coefficients of several common walls with light-weight external thermal
The resources of refractory gold ores are abundant,and their effective treatment can bring good economic benefits.This paper investigated the kinetics of leachi
ZnO-Bi2O3-based varistor ceramics doped with Yb2O3 in the range from 0 to 0.4％ (molar fraction) were obtained by a solid reaction route.The X-ray diffractometry
The flotation tests and XPS analyses on galena,sphalerite and pyrite have been carried out in a collecting-depressing reactivating system (hereafter referred as
There was a bi-directional promoter between gene 38 kd phosphorylated protein (pp38) gene and 1.8-kb mRNA transcript gene family in the genome of Marek's diseas
The research goal is to develop a new solar water heater system (SWHS) that uses a solar bubble pump instead of an electric pump.The pump is powered by the stea