Abstract: The present disclosure relates to a method for high precision laser processing of sapphire with submicron-order section plane using a picosecond-order pulse laser which has high transmittance wavelength to sapphire. The laser triggers ultrafine phase transformation points or electronic state removal points from a lower surface of sapphire. After elevating focal points, a trace which is parallel to laser incident direction is formed. Under a chemical corrosion environment, points of the laser trace are arranged to intersect with other another according to the cutting route to form the corresponding phase transformation region and electronic state removal region. At the same time, by utilizing the catalysis effect of microthermal effect of picosecond laser on chemical corrosion, separation of the sapphire sample along the processing path is obtained.

Abstract: The present disclosure relates to a method for high precision laser processing of sapphire with submicron roughness cutting surface using a picosecond pulse laser which has high transmittance wavelength to sapphire. The laser triggers ultrafine phase transformation points or electronic state removal points from a lower surface of sapphire. After elevating focal points, a trace which is parallel to laser incident direction is formed. Under a chemical corrosion environment, points of the laser trace are arranged to intersect with other another according to the cutting route to form the corresponding phase transformation region and electronic state removal region. At the same time, by utilizing the catalysis effect of microthermal effect of picosecond laser on chemical corrosion, separation of the sapphire sample along the processing path is obtained.

Abstract: The present invention discloses a work fixture, a device and a method for machining the cutting edge of cutting tools. The work fixture comprising: rotatable beveled base inside the fixture shell, the angle of the beveled base can be adjusted by the angle adjusting device; a feeding plate on the beveled base, on which a plurality of grooves are equispaced on the plate for clamping the cutting tools to be machined and completing the machining of the cutting edge. The device and the method of the present invention comprising: a controller being connected with a laser and a laser galvanometer, respectively; the beam of the laser sequentially passing through the reflection lens and the laser galvanometer to make the incident direction perpendicular to the datum plane and shot on the cutting tool to be machined on the feeding plate, and completing the machining of the cutting edge. Wherein, the laser parameters include a wavelength of 100 nm˜1064 nm, 10.

Abstract: A weathering steel consisting essentially of C in the range of from 0.03 to 0.07 percent by weight; Si in the range of from 0.15 to 0.29 percent by weight; Mn in the range of from 1.21 to 1.5 percent by weight; P in the range of from 0.006 to 0.04 percent by weight; S in the range of from 0.001 to 0.01 percent by weight; Cu in the range of from 0.2 to 0.5 percent by weight; Cr in the range of from 0.3 to 0.7 percent by weight; Ni in the range of from 0.15 to 0.35 percent by weight; Ti in the range of from 0.08 to 0.14 percent by weight; and the balance is essentially iron; and methods for producing the same.

Abstract: Taught is a method for producing 700 MPa high strength weathering steel, comprising employing a thin slab casting and rolling technology, comprising (a) smelting at a charging temperature to produce molten steel, (b) refining said molten steel at a tapping temperature, (c) thin slab continuous casting of a casting billet, (d) soaking of said casting billet, (e) hot continuous rolling of said casting billet at a finishing temperature, (f) laminar cooling of said casting billet, and (g) coiling of said casting billet at a coiling temperature, wherein C is present in the molten steel in the range of from 0.03 to 0.07 percent by weight; Si is present in the molten steel in the range of from 0.3 to 0.5 percent by weight; Mn is present in the molten steel in the range of from 0.6 to 1.6 percent by weight; P is present in the molten steel in the range of less or equal to 0.04 percent by weight; S is present in the molten steel in the range of less or equal to 0.