9 results about "Matrix composition" patented technology

This invention discloses an online detection and control system and method for mixed copper concentrate fed into a side-blown smelting furnace, belonging to the field of copper concentrate engineering technology. It includes a batching system, a smelting furnace, and a data processing unit. The batching system and the smelting furnace are connected via a conveyor belt. A belt sampler is installed in the feeding section of the conveyor belt, along with a belt load sensor and a speed sensor. The smelting furnace is equipped with a plug-in thermocouple and an in-situ infrared sensor. The belt load sensor, speed sensor, plug-in thermocouple, and in-situ infrared sensor are all connected to the data processing unit. The matrix composition-detection parameter correction model can output optimal detection parameters within one second without manual intervention, adapting to the detection of samples with different matrix compositions and enabling adaptive adjustment. It can effectively counteract the interference of matrix components such as silicon, aluminum, and calcium on the laser spectrum, significantly improving the detection accuracy of impurity elements and specifically addressing the matrix effect; balancing efficiency and accuracy.

To provide a valve seat made of an iron-based sintered alloy excellent in wear resistance and falling-off resistance.SOLUTION: The valve seat 1 has a two layer structure in which a functional member side layer 11 and a support member side layer 12 are integrated by sintering. The functional member side layer has a structure in which hard particles or further solid lubricant particles are dispersed in a base matrix phase mainly including 5.87% or less of a fine carbide precipitation phase and a tempered martensite phase, and further including 8.11 to 21.39% of a high alloy phase around the hard particles, the iron-based sintered alloy material has a matrix portion composition containing, by mass%, C:0.5 to 2.0%, Si: 0.1 to 1.0%, Mn: 0.1 to 2.5%, Ni: 1.0 to 7.0%, Cr: 1.0 to 12.0%, Mo: 2.0 to 12.0%, Co: 2.0 to 20.0%, W: 0.1 to 2.0%, and V: 0.01 to 1.0%, and further containing S: 0 to 1.5%, and includes pores filled with Cu by infiltration.SELECTED DRAWING: Figure 1

This invention discloses a sulfur-fixed multi-element composite free-machining titanium alloy and its preparation method, belonging to the field of non-ferrous metal materials. The sulfur-fixed multi-element composite free-machining titanium alloy comprises a matrix composition group and a sulfur-fixing composition group; the matrix composition group includes Ti, S, O, Al, Fe, Sn, C, and N; the sulfur-fixing composition group includes Cr, Cu, Mn, Mo, and V; wherein the S component, by mass percentage, is 0.06–0.12%. This invention also discloses a method for preparing the sulfur-fixed multi-element composite free-machining titanium alloy. The sulfur-fixed multi-element composite free-machining titanium alloy of this invention improves the stability of sulfides through multi-element alloying. The titanium alloy contains a layered structure of Ti-Cr-Cu-Mn-Mo-S sulfur compounds, and the uniformly distributed titanium-sulfur compounds improve chip breaking and tool tip lubrication.

The invention discloses a high-strength corrosion-resistant austenitic stainless steel plate as well as a deterministic preparation method and an intelligent collaborative system thereof, and belongs to the field of metal materials and advanced manufacturing. The problem that strength and corrosion resistance of traditional austenitic stainless steel are difficult to synergistically improve is solved. The technical scheme forms a three-in-one deterministic manufacturing system: the first aspect is a high-performance austenitic stainless steel plate which is characterized in that the surface of the high-performance austenitic stainless steel plate is provided with a metallurgically bonded gradient alloy layer, the yield strength is greater than or equal to 550MPa, the first red rust time of a neutral salt spray test is greater than or equal to 4500 hours, and the second red rust time is greater than or equal to 4500 hours; and the matrix components are limited in a precise window meeting a specific relational expression. The second aspect is a deterministic collaborative method for preparing the plate, and the method sequentially comprises the multi-physical-field collaborative process steps of plasma catalytic nitrogen alloying, ultrasonic-electromagnetic anti-correlation regulation and control continuous casting, online plasma surface alloying, microwave solid solution, ultrasonic cooling and the like. The third aspect is an intelligent cooperative system for executing the method, and the whole process is dynamically and cooperatively regulated through a distributed sensor network and a central controller with a built-in multi-physics field digital model. Through deep coupling of components, processes and control, the strength and corrosion resistance of the stainless steel are synchronously and remarkably improved, and the method is mainly used for producing austenitic stainless steel plates with extreme requirements on mechanical and corrosion properties.

To provide a crystallized glass and a chemically strengthened crystallized glass having excellent weather resistance.SOLUTION: Provided are a crystallized glass in which a matrix composition contains SiO2 by 60 to 75%, Al2O3 by 3 to 20% and Li2O by 5 to 25% expressed by mol% on the oxide basis, an average coefficient of linear expansion at 250 to 350°C is 90×10-7[ / K] or less, and a mass variation per surface area when immersed in hot water of 80°C for 120 minutes is 1500 μg / cm2 or less compared with before immersion, and a chemically strengthened crystallized glass in which a matrix composition contains SiO2 by 60 to 75%, Al2O3 by 3 to 20% and Li2O by 5 to 25% expressed by mol% on the oxide basis, an average coefficient of linear expansion at 250 to 350°C is 90×10-7[ / K] or less, and a mass variation when immersed in hot water of 80°C for 120 minutes is 8000 μg / cm2 or less compared with before immersion.SELECTED DRAWING: None

The machinable abutment column comprises an abutment column body used for connecting an implant and a dental crown, the abutment column body comprises an insertion column and a limiting round block which are fixedly connected, and a fixed round block and a convex column which are fixedly connected, and a clamping column is fixed at the central position of the bottom surface of the limiting round block; the outer cutting sleeve comprises an inner titanium alloy net layer and an inner titanium alloy cylinder layer which are fixedly connected, and an outer cutting layer arranged on the outer sides of the inner titanium alloy net layer and the inner titanium alloy cylinder layer; the designed outer cutting sleeve is composed of an outer cutting layer, an inner titanium alloy net layer and an inner titanium alloy cylinder layer, and the outer cutting layer is made of a composite material composed of glass fibers and a resin matrix, so that the outer cutting layer can be conveniently cut by a cutter, and the surface shape of the outer cutting layer is attached to gingival tissue and a dental crown; the effect of limiting the insertion column is achieved, the insertion column is prevented from loosening, and the connection between the abutment column body and the implant is further reinforced.

The present invention relates to phosphate-based glass having a pair of main surfaces facing each other. At least one of the main surfaces contains P, Al, and R (R: Li, Na, K, Rb, Cs) as glass constituent components. The ratio represented by {compT / compB} is greater than 1.0, where compT is the maximum value in the glass surface layer of the ratio comp represented by {Al2O3 / (ΣR2O+ΣR'O)} (R': Mg, Ca, Sr, Ba, Zn) using content proportions expressed in mol% based on oxides, and compB is the aforementioned ratio in a matrix composition.

The utility model discloses a silicon carbide energy-saving resistance wire, which comprises a resistance wire body, the resistance wire body comprises a plurality of base bodies, a filling layer is arranged between every two base bodies, a same conductive layer is arranged on the outer sides of the circumferences of the base bodies and the filling layers, an inner protective layer is arranged on the outer side of the conductive layer, an outer protective layer is arranged on the outer side of the inner protective layer, and the outer protective layer is arranged on the outer side of the inner protective layer. And two ends of the outer protective layer are provided with electrode tips. According to the utility model, the plurality of substrates form a parallel structure through the filling layers among the plurality of substrates and the conductive layers, so that the total resistance value is reduced, the energy-saving effect is generated, and through the arrangement of the outer protection layer, the device has a better protection effect, mechanical shock can be avoided, the protection capability is improved, and the service life of the device is prolonged. And a double-layer protection effect can be achieved in cooperation with the inner protection layer.

The invention discloses an yttrium oxide-based refractory material resistant to high-temperature metal melt erosion and a preparation method thereof. The material takes Y2O3 as a main component, the mass fraction is not less than 90%, and Al2O3 and TiO2 are used as composite modifiers. The material is composed of aggregate formed by electric smelting or sintering Y2O3 particles and a matrix formed by Y2O3, Al2O3 and TiO2 fine powder or precursors thereof. Through component and structural design, the thermal shock resistance and mechanical strength of the material are remarkably improved while excellent erosion resistance is maintained. Due to the introduction of Al2O3 and TiO2, low-temperature sintering is promoted, and a reinforced phase is generated in situ; the proper apparent porosity of 12%-20% of the material is obtained through process regulation and control so as to buffer thermal stress; the obtained material is low in thermal expansion coefficient, excellent in thermal shock resistance and suitable for high-purity smelting crucibles, runners and other products of titanium-based, nickel-based, vanadium-based and other active alloys.