78results about How to "Reduce roughness" patented technology

The invention discloses an ultrasonic vibration auxiliary milling method for a Ti2AlNb material, and belongs to the technical field of alloy material machining. The method comprises the following steps: removing a surface oxide layer from a Ti2AlNb material piece; the Ti2AlNb material piece is subjected to longitudinal-torsional composite ultrasonic vibration auxiliary milling machining; wherein the longitudinal-torsional composite ultrasonic vibration is used for assisting milling, and the vibration parameters of the longitudinal-torsional composite ultrasonic vibration are as follows: the torsional vibration tangential line amplitude is 4-8 microns, the ultrasonic frequency is 20-30 kHz, the longitudinal vibration amplitude is 3-6 microns, and the phase difference is 90 degrees. According to the method, the Ti2AlNb material piece with the machining surface small in roughness value and large in residual compressive stress value is finally obtained, harmful tensile stress of the machining surface obtained through pure milling machining is converted into compressive stress, generation of microcracks can be effectively restrained, and the service life of the material is prolonged.

The invention belongs to the technical field of talc, and provides a method for detecting fluorescent substances in talc raw ore, which comprises the following steps: S1, carrying out ball milling on the talc raw ore in a ball mill, sieving to obtain sieved powder, and adding deionized water into the sieved powder to obtain slurry; s2, adding the slurry into the mixture to enable the pH value of the slurry to be 5, stirring, and standing in a water bath for 2-3 hours to obtain a first precipitate; s3, adding a thiourea-ascorbic acid solution into the first precipitate to obtain a second precipitate; and S4, carrying out secondary ball milling on the second precipitate, and spreading the second precipitate in an enamel plate to detect whether the talc raw ore contains the fluorescent substances or not. The hydrochloric acid can dissolve quartz and mica to avoid generation of background fluorescence or quenching effect, and the nonionic surfactant polyethylene glycol can be adsorbed on the surface of the mineral to reduce interfacial tension, so that the hydrochloric acid is easier to infiltrate tiny pores, the pit defect caused by local over-corrosion is reduced, the pickling uniformity is improved, and the detection sensitivity is improved.