2results about How to "Promote redistribution" patented technology

This invention belongs to the field of materials processing and preparation technology, and provides a method for accelerating the martensitic decomposition of additive titanium alloys with high-energy short-time pulsed current. By designing pulsed current parameters, this invention establishes a quantitative relationship between current density, action time and microstructure evolution, thereby effectively suppressing grain coarsening while efficiently driving the rapid decomposition of acicular martensite. Ultimately, it breaks through the traditional constraint between strength and plasticity in additively manufactured titanium alloys, and achieves significant optimization of its comprehensive mechanical properties.

The utility model discloses a shock absorption lubrication valve stem, it includes valve stem body, and the contraction portion is equipped with in valve stem body middle section, and the contraction portion is equipped with the shock absorption lubrication subassembly that is composed of the upper circular platform and lower circular platform of the upper and lower interval arrangement on the sleeve. The through hole of the interference fit with the contraction portion is set up in the center of upper and lower circular platform, and the first spiral oil storage groove filled with the lubricating grease and the second spiral oil storage groove are respectively screwed on the conical side surface. The big bottom surface of upper and lower circular platform is opposite, and the first arc convex and the second arc convex that are staggered distribution are respectively equipped on it. The utility model discloses through spiral oil storage groove realizes self -lubricating, through arc convex and circular platform combination form multiple shock absorption heat preservation air gap, and through the friction reducing convex point reduces the contact area, and the wear resistance, the impact resistance and the sealing member anti -icing effect of valve stem are comprehensively promoted, especially suitable for the low temperature working condition of limited space.