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Taking low-speed and heavy-duty gear as the research object, the fatigue crack propagation and fatigue fracture of gear teeth are

Before carrying out the bending fatigue test, it is necessary to determine the stress level of the test. Two of

Fatigue cracks often occur when the component is under the condition of alternating load for a long time. The initial

The fatigue crack growth mechanism of 42CrMo steel was studied by fatigue crack growth test. The law of fatigue crack

Fatigue fracture is the surface formed by the fatigue fracture of the test sample or component during the test or

With the continuous improvement and innovation of fatigue crack testing methods, the research on small fatigue cracks has gradually changed

Wu Zhenpeng and others took the helical gear as the research object, modeled the helical gear, simulated the crack propagation

Robert Basan proposed the mathematical model of slip line contact and the calculation model of multiaxial fatigue life based on

Although the strength of mechanical gear bearing capacity does not entirely depend on gear hardness, improving gear hardness is still

Because the mechanical operation is mostly heavy load, medium and low speed transmission, most of them start frequently and often

Comparison of machinability and forgeability between Ni Cr and Ni Cr Mo steels The machinability of different materials is mainly

Other countries in the world mainly use Cr Ni and Cr Ni Mo carbon steel. Compared with Mn Cr steel

Gear is a kind of mechanical element with continuous meshing transmission of motion and power on the rim, which plays

Tooth wear is one of the main failure forms of low speed and heavy load gear transmission. H. Winter has

The important parameters to ensure the load-bearing capacity of low-speed and heavy-duty hard face gear are: enough central strength and

It is very important to choose the hardening heat treatment method of low speed and heavy load gear reasonably. The

The main damage form of gear in soft tooth surface rolling mill is severe plastic deformation of gear surface, which

Using normalizing big gear and quenching and tempering small gear, the tooth surface after use can be extruded into mirror

As the cement mill, mine hoist and other soft tooth surface reducer gear, the main problem is to eliminate early

When gears work, they bear two kinds of stress, so there are few two kinds of failure. One is that

There are three ways to improve the bearing capacity of gears, namely, ① improving the structure of reducer, such as