The results show that tempering temperature has obvious effect on the quantity and morphology of carbides in 30cr13nb0.1 steel, which indirectly affects the corrosion resistance of steel. The figure shows the potentiodynamic polarization curves of 30cr13nb0.1 steel quenched at 1020 ℃ and tempered at different temperatures in 3.5% NaCl...
The effect of tempering temperature on the impact properties of 30cr13nb0.1 steel is shown in Fig. 1. It can be seen from Fig. 1 that with the increase of tempering temperature, the impact absorbed energy of 30cr13nb0.1 steel first increases and then decreases, which corresponds to the change of...
It can be seen from the figure that with the increase of tempering temperature, the hardness of 30cr13nb0.1 steel first decreases and then increases. Combined with SEM analysis, it can be seen that the change of hardness is closely related to the formation of carbides. When the tempering temperature...
Fig. 1 shows the microstructure of 30cr13nb0.1 steel tempered at different temperatures. It is preliminarily judged that it is martensite and carbide. As shown in Fig. 1 (a), carbides are mainly in the form of dots and fine chains. Fig. 1 (B, c) shows that when the tempering temperature...
Test material and heat treatment process The ingot containing 0.117% Nb (mass fraction) was melted in 15 kg medium frequency induction furnace. The chemical composition of the steel was determined by pmi-masterpro mobile direct reading spectrometer. The ingot was homogenized annealed at 1100 ℃ for 2 h, then quenched...
30cr13 martensitic stainless steel has good mechanical properties, hardenability and corrosion resistance, which is widely used in medical devices, measuring instruments and molds. The low temperature toughness and strength of 30cr13 steel can be significantly improved by the dispersion precipitation of carbon and nitride (size less than 5 nm)...
1.Characteristics of wear resistant steel ball The composite wear-resistant casting steel ball has excellent comprehensive properties such as high strength, strong toughness and fatigue resistance. The steel ball is made of manganese, silicon and nickel as phase change elements. After compound inoculation and special heat treatment process, the high...
The steel ball used in ball mill can be divided into casting ball and forging ball. Generally, the diameter of casting ball is less than 120mm, which is used in ball mill; large diameter mill or semi autogenous mill requires larger diameter of steel ball, which is basically forged...
The properties of tensile samples were tested by a universal testing machine controlled by microcomputer, and the tensile strength and lower yield strength of each sampling part were tested. With the different sampling locations, the tensile strength and yield strength of cast steel castings produced by the same foamed...
Six groups of samples were taken when analyzing surface carburization, and the location of the test point was changed to the center of the sample section, so as to analyze the volume carburization and carbon content test results inside the casting. It can be seen that the influence degree...