2results about How to "Increase surface stress" patented technology

The invention relates to the technical field of glass, in particular to a method for strengthening glass through low-temperature ion exchange, which comprises the following steps: carrying out first ion exchange strengthening treatment on glass to be treated by adopting first molten salt to obtain primary strengthened glass; carrying out secondary ion exchange strengthening treatment on the primary strengthened glass by adopting second fused salt to obtain the low-temperature ion exchange strengthened glass, wherein the first molten salt comprises a lithium salt, the second molten salt comprises a potassium salt, the temperature range of the first ion exchange strengthening treatment and the second ion exchange strengthening treatment is 250-400 DEG C, and the ion exchange temperature requirement can be met. The two-step strengthening is adopted at low temperature to gradually enhance the surface stress of the glass, so that the bending deformation of the glass caused by sudden enhancement of the surface stress of the strengthened glass is avoided, and the phenomenon of warping of the edge of the glass is effectively improved.

The application relates to the technical field of material crushing, in particular to a preparation method of a high-wear-resistance and high-toughness crusher blade and the obtained blade, and the preparation method comprises the following steps: blanking a steel billet into a steel block and forging the steel block into a circular ring, rough machining, quenching and tempering heat treatment and fine machining are performed on the upper and lower surfaces of the circular ring, so that the upper and lower surfaces of the circular ring are flat and have a hardness of HRC 28-32; an induction coil is prepared, the upper and lower surfaces of the circular ring are subjected to induction quenching treatment, so that the surface hardness of the circular ring reaches HRC 58-62; a plurality of teeth are machined in the circumferential direction of the circular ring to obtain a preform; a profiled coil is prepared, and the teeth are subjected to induction quenching treatment, so that the hardness of the side surfaces of the teeth reaches HRC 58-62; the preform is subjected to grinding and a spline hole or a hexagonal hole is machined to obtain the high-wear-resistance and high-toughness crusher blade; the application can obtain the crusher blade which has high surface hardness, high wear resistance, toughness in the core and does not break and fail when crushing hard objects.