4results about How to "Tissue distribution" patented technology

The present application relates to a kind of crusher super wear-resistant cone lining plate steel and its preparation method, contains the following components by mass percentage: C:1.30-1.50%, Mn:22-25%, Si:0.35-0.80%, Cr:2.0-2.5%, V:0.1-0.15%, Ti:0.06-0.12%, N:0.05-0.08%, Mo:0.3-0.6%, P≤0.035%, S≤0.015%, the balance is Fe and inevitable impurities.Mass ratio of Mn / C is 16-18, mass ratio of Cr / V is 16-20, and total mass ratio of Cr+Mo≤2.8%.The hardness of steel can reach 289HB, impact toughness can reach 203J / cm 2 , tensile strength can reach 849MPa, reduce the mass addition of Ni, Mo and other elements, greatly reduce cost.

The invention provides a preparation method of a gallium oxide ceramic target material, and relates to the technical field of preparation of oxide target materials and preparation of semiconductor target materials. The method comprises the following steps: weighing a pure-phase gallium oxide target material by using an electronic scale, pouring powder into an alumina crucible, adding a proper amount of a binder, stirring, granulating, screening by using a proper screen, pouring into a mold, vibrating, and uniformly paving; and then preparing the pure gallium oxide target material by adopting a hydraulic machine for tabletting, sintering and other processes. The steps of mixing, drying and the like are added before granulation of the doped tin oxide target material. The target material prepared by the method is not easy to fall off powder, damage and the like in the transfer process. The ceramic target material sintered at 1200-1800 DEG C for 16-32 hours after low-temperature baking and degumming is smooth in surface and compact in structure, and the phenomena of damage, splashing and the like cannot occur in the use process of the subsequent laser technology.

The invention provides a low-oxygen WRe / TZM metal target disc for a bulb tube of a CT machine and a preparation method of the low-oxygen WRe / TZM metal target disc. The method comprises the following steps that S1, WRe alloy powder is weighed and dried, and a TZM alloy plate blank is cleaned and dried; (S2) the WRe alloy powder and the TZM alloy plate blank are loaded into gradient molds correspondingly, and pre-pressing forming is conducted; s3) putting the gradient mold filled with the pre-pressed and formed blank into a furnace chamber of an SPS sintering furnace, vacuumizing to be below 6Pa, and sintering to obtain a WRe / TZM composite sintered blank; and S4) carrying out machining to obtain the WRe / TZM metal target disc. The metal target disc has the advantages of being high in density, uniform in structure distribution, low in content of impurities such as gas, high in molybdenum alloy matrix strength, good in machining performance, high in heat dissipation capacity, good in thermal shock resistance and the like, and the interface achieves good metallurgical bonding.

The utility model discloses a kind of concave hemispherical metal superhard grinding wheel forming die and sintering mould, the concave hemispherical metal superhard grinding wheel forming die includes mould frame and the upper pressing block in mould frame, lower pressing block;The upper pressing block is located above lower pressing block;The side of upper pressing block and abrasive layer contact is concave arc structure;The side of lower pressing block and abrasive layer contact is convex arc structure;The upper pressing block includes support, core rod;The inside wall of mould frame is stepped structure;The upper portion of support extends outward and forms lug;The lug is located on stepped structure;The height of stepped structure is consistent with the height of lug;Lower pressing block is set or not set with ring. The utility model can effectively avoid the large excess amount of concave hemispherical grinding wheel, solve the problem of raw material waste, cost increase in prior art, improve production efficiency, and there is no matrix when pressing, guarantee the compactness of abrasive layer organization and grinding wheel quality.