36results about How to "High wear strength" patented technology

Self-sharpening wearing part having improved abrasion resistance and strength, which wearing part comprises at least a first and a second material part. The first material part is constituted by a casting body and the second material part is comprised of at least one elongated hard metal rod which is fixed in the first material part. The wearing part produces an auto-signal when the part must be changed due to wear.

The invention belongs to the technical field of catalysts, and in particular relates to a catalytic cracking catalyst and a preparation method thereof. According to the catalytic cracking catalyst, phosphorus aluminum glue is used as an adhesive; and in a catalyst preparation process, zinc oxide is added and is used as an auxiliary agent. The catalyst contains the zinc oxide, and the phosphorus aluminum glue is used as the adhesive; and the catalyst has the functions of improving the yield of propylene and increasing the aromatics content in gasoline. Compared with the catalyst which is high in cost and contains chlorine aluminum gel, the catalyst solves the problems of corrosion and discharging of hydrochloric acid gas and does not contain chlorine; the phosphorus aluminum glue is high in adhesion, so that the catalyst is high in abrasion resistance; and the preparation method is simple and feasible and is easy to implement.

The invention discloses an electromagnetic switch protective structure and a mounting method thereof. The electromagnetic switch protective structure comprises an electromagnetic switch body (1), a guide cylinder (2) mounted on the electromagnetic switch body (1), and an movable iron core draw bar (3) mounted on a movable iron core end surface (8). The guide cylinder (2) is provided with a U-shaped positioning snapping groove (4), and the movable iron core draw bar (3) is provided with a positioning snapping groove (5). The electromagnetic switch protective structure also comprises a bowl-shaped rubber sealing cover (6), the bottom of the bowl-shaped rubber sealing cover (6) is provided with a central hole, the portion of the central hole is snapped inside the positioning snapping groove (5), and an opening end is mounted inside the U-shaped positioning snapping groove (4). According to the electromagnetic switch protective structure, the U-shaped positioning snapping groove and the positioning snapping groove achieve the positioning of the bowl-shaped rubber sealing cover and further achieve the sealing of the periphery of the guide cylinder to complete the protection to the movement of the movable iron core of an electromagnetic switch; meanwhile, an air exhaust device on the bowl-shaped rubber sealing cover can well release the negative pressure of the electromagnetic switch.

Disclosed is a thin woven fabric wherein thermoplastic synthetic fibers of fineness from 5 to 30 dtex are disposed in at least some of the warp and weft threads of a woven fabric and the number of intersections of the warp and weft threads of said woven fabric is from 23000 to 70000 / 2.54 cm2. Said woven fabric in the thin woven fabric is subjected to a silicone resin treatment.

A NOx reduction catalyst which is composed of a molded body that contains a catalyst component, while having microcracks that extend in the shape of a network or a double-sided comb on the surface of the molded body, and which is configured such that: the microcracks have a 95% crack width of 100 (mu)m or less; the variation coefficient of the crack area ratio is 0.7 or less; and the average of the crack area ratio is preferably 1-14%. A method for removing nitrogen oxides from a combustion exhaust gas, which comprises a step for processing a combustion exhaust gas containing nitrogen oxides in the presence of the above-described NOx reduction catalyst.

The invention discloses a catalyst system for sulfur-hydrocarbon-containing desulfurization, a sulfur-hydrocarbon-containing desulfurization method using the catalyst system and a device for implementing the method. The catalyst system comprises a desulfurization auxiliary and a monolithic catalyst, wherein the active ingredient coating of the monolithic catalyst comprises 30-90wt% of active metal and 10-70wt% of substrate; the desulfurization auxiliary comprises 5-35wt% of alumina, 5-35wt% of a silicon oxide source and 30-90wt% of oxide of at least one metal of IIB, VB and VIB families; the desulfurization auxiliary is microspheres having average grain size of 20-200 microns; the weight ratio of the desulfurization auxiliary to the active ingredient coating of the monolithic catalyst is (1-9):1. The catalyst system provided by the invention has better desulfurization activity and desulfurization stability.

The invention relates to a spinning machine, in particular to an opening device of a free end spinning machine. The opening device is provided with metallic card clothing (3) or ring clothing (11) used for individually separating the fibers of the fed-in fiber strips. The opening device of the invention is characterized in that the metallic card clothing (3) is pre-bent according to the geometricshape of a supporting ring (2), the ring clothing (11) is provided with the required geometric shape of a processed part, the surface of the corresponding processed part is provided with a structure with at least two layers, wherein an outer layer (13) is a hard material layer which is partially or wholly made of extremely hard material component, and arranged on a base layer (12).