In China’s automobile industry, the materials used for gears in the gearbox have mainly used the gear steel series of the former Soviet Union for many years; In the 1960s and 1970s, in order to save Cr and Ni resources, China studied B steel and Si – Mn, Cr...
In foreign countries, the carburized gear steel initially used is basically manganese steel and manganese chromium steel. For example, the Japanese mainly use smn420 and SMN C420, while the Germans mainly use 16MnCr5 and 20mncr5. This kind of steel is cheap and has good comprehensive properties. At that time,...
As an important part of transmitting power, gear shaft is widely used in transmission or reducer parts of heavy industrial equipment such as agricultural machinery, transportation and mining machinery. Its service environment is extremely harsh. While transmitting power, it also has to bear high-strength alternating load and impact load....
Reduction of area and elongation are one of the key parameters of material plasticity. As shown in the figure, the change of reduction of area and elongation of 16MnCrS5 steel under different spheroidizing annealing processes. Compared with other processes, 16MnCrS5 steel has the best plasticity under process 1 conditions,...
After the spheroidizing annealing treatment of four processes, the SEM analysis results of each structure are shown in Figure 1. Through comparison, it is found that under the condition of process 1, the spheroidizing rate of lamellar cementite in the material matrix reaches more than 95%, which is equivalent...
The chemical composition of 16MnCrS5 steel for cold forged gear used in the test is shown in Table 1, and the sample size is selected as the diameter The height of ϕ35mm round steel is 150mm, which is used to measure the hardness value (average value of 3 ~...
The compression test is carried out by Gleeble-1500 thermal simulation testing machine to find out the influence law of heating temperature and strain rate on the rheological stress of 20CrMnTi steel, analyze the microstructure change of isothermal compression, and then preliminarily analyze its deformation mechanism. 1.Selection of test equipment...
The depth value greater than the microhardness 685 HV of carburized layer is recorded as the strengthening layer depth, and the change trend of strengthening layer depth with grinding parameters is obtained, as shown in the figure. It can be seen from figure (a) that the depth of strengthening...
In 1997, Professor Wang Xibin of Beijing University of technology conducted an experimental study on the grinding surface residual stress of several common structural ceramics by using X-ray diffraction method, and pointed out the residual stress of the grinding surface of bevel gear steel σ From the original stress...
In view of the performance change of strengthening layer of gear steel 30CrMnTi material under dry grinding condition, through grinding test, firstly analyze the microstructure change of strengthening layer after grinding, then carry out grinding strengthening test with different grinding speed and grinding depth, and study the change law...