49results about How to "Raise the stress value" patented technology

The invention relates to multi-component kits, comprising at least two components, which include mutually complementary precursors of curable reactive resins; to the use of appropriate combinations of complementary precursors at the desired site of use, especially in the form of those kits, for producing synthetic mortars; to obtainable synthetic mortars; and to methods comprising the use of those kits in fastening technology.

Disclosed is an ion implantation process for reinforcing bearing steel ball surface of GCr15 by using nitrogen and titanium as implantation elements which are implanted by employing a linear-beam high-current double-element ion implanter. The invention employs monoenergetic mode with implantation energy of 100KeV (kilo electron volt). Titanium is implanted and then nitrogen is implanted, implantation dose is controlled within 2.0 to 3.0*10 17 Ti+2.0 to 3.0 *10 17 N, linear ion beams are implanted in a steel ball with a curved surface, steel balls with different diameters produce different refraction effects, thereby the implantation dose needs to be adjusted within the implantation dose range according to the real sizes and properties of the steel balls, ensuring the concentration of nitrogen ion implanted on the surface of the steel ball over 18%, the concentration of titanium ion over 10% and uniformity over 85%. The employment of the implantation process is capable of guaranteeing the depth, concentration and uniformity of ion implantation of the surface of the steel ball, and thereby the steel ball surface has the advantages of relatively high hardness, relatively good corrosion resistance and abrasion resistant properties, relatively long endurance life and relatively high reliability.

Embodiments of a diffuser vane comprise a vane body with a leading edge and a trialing edge that can rotate about the leading edge to improve performance of a compressor device. This configuration maintains the position of the leading edge on the diffuser vane relative to the orientation of the working fluid. In one embodiment, the diffuser vane incorporates a support element that couples with the vane body. The support element counteracts stimulating frequencies to reduce vibration of the vane body. The diffuser vane can also comprise an armature, which couples with a force coupler to facilitate rotation of the trailing edge when in position in a compressor device.

The invention relates to a closed pore CNTs / Al-Si composite foamed material. The closed pore CNTs / Al-Si composite foamed material comprises, by weight, 5%-25% of silicon powder, 0-5% of magnesium powder, 0.15%-1.5% of TiH2 powder and the balance CNTs / Al powder obtained through in-situ chemical vapor deposition. The preparation method includes the steps that the in-situ CNTs / Al powder is subjectedto mechanical ball milling; the CNTs / Al powder obtained through ball grinding is mixed with the silicon powder, the magnesium powder and a foaming agent in a stirring machine; the mixed powder is subjected to cold-press molding, so that a cylindrical precast block is obtained; and the precast block is put into a cylindrical steel mold of a resistance furnace for fast foaming, and accordingly the closed pore CNTs / Al-Si composite foamed material can be obtained. According to the closed pore CNTs / Al-Si composite foamed material, foam pores are evenly distributed, and the size dimensions are uniform; and full-closed holes are formed, the strain rate sensitive effect is low, and the compression stress-strain curve has an obvious platform region. The foamed aluminum material product prepared through the method is stable in quality and excellent in performance, the preparation process is simple and the technological process is fast.

Disclosed is an ion implantation process for reinforcing bearing steel ball surface of GCr15 by using nitrogen and titanium as implantation elements which are implanted by employing a linear-beam high-current double-element ion implanter. The invention employs monoenergetic mode with implantation energy of 100KeV (kilo electron volt). Titanium is implanted and then nitrogen is implanted, implantation dose is controlled within 2.0 to 3.0*10 17 Ti+2.0 to 3.0 *10 17 N, linear ion beams are implanted in a steel ball with a curved surface, steel balls with different diameters produce different refraction effects, thereby the implantation dose needs to be adjusted within the implantation dose range according to the real sizes and properties of the steel balls, ensuring the concentration of nitrogen ion implanted on the surface of the steel ball over 18%, the concentration of titanium ion over 10% and uniformity over 85%. The employment of the implantation process is capable of guaranteeing the depth, concentration and uniformity of ion implantation of the surface of the steel ball, and thereby the steel ball surface has the advantages of relatively high hardness, relatively good corrosion resistance and abrasion resistant properties, relatively long endurance life and relatively high reliability.

The invention relates to a superfine aluminum alloy conductor and a preparation method thereof. Compared with the prior art, the preparation method includes the steps: alloying by the aid of a plurality of elements; preparing and adding intermediate alloy particles; comprehensively adopting the technologies such as rapid aluminum melting at high temperature and electromagnetic stirring; controlling temperature in a partitioned manner, and performing directional solidification; continuously casting and rolling materials; drawing the materials in a multi-pass manner; performing heat treatment to prepare the aluminum alloy conductor which is excellent in corrosion resistance and high in creep resistance and has excellent strength and conductivity in the length direction. Bonding reliability is improved, and packaging cost is remarkably reduced.

The invention relates to a nanofiber-reinforced polyimide airgel material and a preparation method thereof. The raw materials include: water-soluble polyamic acid, polyimide nano-short fibers, triethylamine and water. The polyimide airgel prepared by the present invention has a low shrinkage rate, and its Young's modulus is improved under the condition that the density is basically unchanged, and its comprehensive performance is excellent. The scope of application of polyimide airgel.

The invention provides an ion exchange enhancement method of laser glass. The method comprises the following steps: S1, ion exchange: carrying out ion exchange treatment of the laser glass by using mixed molten salt formed by a mixture of RbNO3 and CsNO3; S2, surface heat treatment: carrying out rapid heat treatment of the laser glass after being subjected to ion exchange in the step S1 by using mixed molten salt formed by a mixture of NaNO3 and LiNO3; and S3, surface acid treatment: carrying out surface acid treatment of the laser glass after subjected to surface heat treatment in the step S2by using mixed acid formed by a mixture of any two of HCl, H2SO4 and CH3CH2COOH or a mixture of HCl, H2SO4 and CH3CH2COOH. A pressure stress layer with higher stress value and deeper depth can be formed on the surface of the laser glass treated by the method; meanwhile, the stress relaxation time is longer; the chemical stability is greatly improved; the laser glass has higher microhardness, fracture resistance and brittleness temperature and stronger water resistance.

The application provides an experimental method for simulating strain rockburst at roadway intersections, comprising: providing a cuboid or cube-shaped rock sample, loading three-dimensional initial stress on six faces of the rock sample, and maintaining 5- 10 minutes. The load acting on the two opposite surfaces of the rock sample is suddenly unloaded, so that the two opposite surfaces of the rock sample form a free surface, and the excavation and unloading effect of the rock mass at the intersection of the roadway is simulated, and the rock sample is observed state: if rockburst damage occurs to the rock sample, the experiment ends; if no rockburst damage occurs to the rock sample, the vertical stress value of the two stresses that have not been unloaded is increased until the rock sample Rockburst damage occurs. The experimental equipment used in the experimental method provided by this application is a true triaxial rockburst experimental equipment that can realize rapid unloading under high pressure on two or more horizontal surfaces. The application can well simulate the strain rockburst of the rock mass at the roadway intersection.

The invention relates to a preparation method of a film-grade TPU slice. The preparation method of the film-grade TPU slice comprises the following steps: (1) mixing tetrahydrofuran and epsilon-caprolactone ester ether copolyglycol with methylene diphenyl diisocyanate in a homogenizer, then entering mixture into a prepolymerization reactor to obtain prepolymer; (2) entering the prepolymer into a prepolymer cooler, cooling to 5-10 DEG C, entering the cooled prepolymer into a homogenizing machine to be mixed with 2-methyl-pentamethylene diamine and 1,4-butanediol to obtain a primary material; (3) entering the obtained primary material into a polymerization reactor to obtain a secondary material; (4) entering the secondary material into an ageing tank to be subjected to ageing, so that a final material is obtained; and (5) recycling a slice, entering the slice into a slice drying machine to be dried, so that the film-grade TPU slice is obtained. The film-grade TPU slice obtained by utilizing the preparation method provided by the invention has the advantages that shore hardness is 80-90A, breaking elongation is 650-700%, breaking strength is 70-75MPa and properties are excellent.