A rolling press treating method for surface protruding on metal materials
A technology of metal materials and processing methods, which is applied in the field of metal material surface protrusion rolling processing, can solve problems such as difficult control, difficult processing, and high requirements, and achieve good controllability of process parameters, prevention of gas pollution, and high reliability. Effect
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[0012] The present invention will be further described in detail below with reference to the accompanying drawings and examples. However, the invention is not limited to the examples given.
[0013] Embodiment 1 of the present invention is to carry out rolling nanocrystallization treatment on the surface of the outer cylindrical surface of the 20 steel annular workpiece.
[0014] Original state: the average grain size of the annealed state is 26um, the workpiece size is Φ200×20×50, the processing process and control conditions: the surface of the workpiece is cleaned—the pressure of the rolling chamber is 6.67×10 -2 Pa——Three rolling die treatment, pre-rolling processing process: two rolling dies are distributed with protrusions with a diameter of 2mm, and their depth of pressing into the workpiece is 0.02mm, and the other rolling die is distributed with a diameter of 20mm The protrusion, which is pressed into the workpiece at a depth of 0.005mm, and the plastic deformation r...
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