Effect of tensile strain rate on spall fracture in 20 steel;

TiC penetration and depositing on 20 steel surface by double-glow plasma alloying;

Flashing butt welding between ferrite spheroidal graphite cast iron and 20 steel;

Taking 20# steel commonly used in heat exchanges as a study object,its anticorrosion of hot-dip aluminizing was researched.

In recent years, thinking of working safe, 20# steel is applied to significant construction project in the homeland more and more, especially to burying field facilities, therefore, The study on 20# steel’s corroding law and forecasts has very strong theory significance and gigantic realistic value.

The tribological properties of GCr15 steel ball against 20# steel disc under unlubricated condition and lubrication of plant oil containing nano calcium carbonate particles were investigated on the Universal Micro-Tribometer.

Production practice on casting the round tube blank of steel 20 with round tube blank continuous caster

The morphology and formation mechanism of the microstructure of the composite ion-nitrided plus chromized layers obtained at various chromization temperatures in a plain low-carbon steel (steel 20) were investigated using metallography, X-ray diffraction and microanalysis.

The microstructure and fracture morpholo gy of steel 20 were studied using scanning electron microscope (SEM) and X-ray diffractometer (XRD).

Problems of the Mix RatioTest of AC-20Ⅰ Asphalt Concrete;

Since the 1980s,the world community development and the rule of law entered a new phase;under this background,great progress are made in administrative control legislation both in the mainland and Taiwan in nearly 20 years,in the process of the rule of law exists larger comparability.

In the 20 years from 1981 to 2000 in China, the teaching pattern research ran through three stages of introduction, theoretical exploration and pattern construction and its content covered the concept, structure, features, function, category, choice, application and construction.

The result indicated: during 20 years the Korean National Minority student\'s growth level has certain scope to enhance, after before the growth rate and the speed performance are“, quick, slow”the characteristic, the student build already started from“the bean sprouts”to approach the transformation“symmetrically”.

On the Education Reform in Zhejiang in the 1920s;

Space for Modern Essays in North-East China in 1920s;

A Study on the Chinese Economic Thought of Cooperation in 1920s;