33results about How to "Large sample size" patented technology

The invention relates to a sample for testing adhesion and anti-shearing strength of refractory mortar and a testing method thereof. According to the scheme, the sample is a whole formed by three refractory bricks in a bonding mode through the refractory mortar to be tested; the sample has three specific shapes that 1, upper planes and lower planes of the three refractory bricks are all flush with each other; 2, the lower planes of the three refractory bricks are flush with one another, and the upper plane of the middle refractory brick is higher than the upper planes of the refractory bricks at the two sides; 3, the upper plane of the middle refractory brick is higher than the upper planes of the refractory bricks at the two sides, and the lower plane of the middle refractory brick is concaved into the lower planes of the refractory bricks at the two sides. Materials of the three refractory bricks are matched with the materials of the refractory mortar to be tested, and refractory mortar bonding surfaces of the three refractory bricks are original brick surfaces of the refractory bricks. The three refractory bricks have the shapes that the middle refractory brick is shaped like a cuboid or a cube, and the refractory bricks at the two sides are each shaped like a cuboid or a cube or a trapezoid with the vertical bonding surface. According to the sample for testing the adhesion and anti-shearing strength of the refractory mortar and the testing method thereof, the preparation is convenient, and the sample is large is size; the testing process of the prepared sample is easy, and the testing result is accurate and reliable.

The invention discloses a rock-soil pressure shear rheological testing machine and a testing method, the testing machine comprises a mainframe, a vertical loading system and a horizontal loading system are provided on the mainframe, and a servo oil pressure system controlled by a computer provides oil pressure to the vertical loading system and the horizontal loading system. According to the invention, a shearing apparatus, the horizontal loading system, a servo hydraulic system and an electric control system are added for realizing automation, control and accuracy of the tests. An original waste and old press mainframe and a vertical oil cylinder are used by the testing machine, thereby about 50% of cost can be saved, the testing machine aims at test materials such as rock, rock mass and soil / stone compound body, and can perform with the following tests: a compression test, a shearing test, a residual strength shearing test, a compression rheological and shearing rheological test.

This invention relates to disk-type strip steel rapid cooling test apparatus for stimulating annealing process requirement of continuous annealing of strip steel, and its usage method. The apparatus comprises: a disk-type case, a disk-type sample fixing frame and a compensating wire that can rotate around a core axis in the case, a sample loading / unloading chamber, a heating / homogenizing chamber, a slow cooling / over-aging chamber, a spray cooling chamber and a water quenching chamber. When used, the compensating wire is connected to the surface of the sample, and then the sample is introduced into the above chambers in sequence. This invention has such advantages of large sample size, a wide variety of cooling methods, high cooling speed, simple apparatus, and low malfunction rate.

An in-situ shear experimental instrument for measuring the contact surface of saturated loess-mudstone. The lower shear box is installed in the experimental foundation pit. The upper shear box is installed on the lower shear box. The upper shear box is connected to the inner wall of the experimental foundation pit. A horizontal hydraulic jack is set horizontally in the middle; a shear box pressure cover is installed on the top of the upper shear box. The shear box pressure cover is connected to the counterweight support plate through the axial hydraulic jack, and the counterweight support plate is equipped with a counterweight; in the experimental foundation pit The water container is also installed through the water container support rod, and the water container is connected to the water inlet hole on the upper part of the upper shear box through a water pipe, so that the injected water flows out from the lower part of the upper shear box. The in-situ shear tester provided by the present invention can truly reflect and keep the contact surface between loess and mudstone in a state of overhumidity, saturation and soft plastic for a long time in situ without disturbing the soil. The size of the test sample is large, which is an ideal way to obtain loess- An effective instrument for in-situ instantaneous shear strength and long-term creep shear strength parameters of "heterogeneous soil" at the mudstone contact surface.

The invention discloses a hot isostatic pressing preparation method of a high-density molybdenum-copper alloy and the hot isostatic pressing preparation method is used for solving the problems that material heat conductivity and device air tightness are influenced by defects such as relatively low relative density, non-uniform component distribution and relatively small sample sizes existing in a process of preparing a molybdenum-copper alloy by using an existing method. The hot isostatic pressing preparation method comprises the following steps: performing ball milling on weighed raw materials, firstly preparing a cold-pressed billet, and then removing a low-density oxide phase by virtue of hydrogen reduction. By adopting a high-vacuum hot isostatic pressing dense sintering method, the density problem of the molybdenum-copper alloy can be successfully solved, the sintering temperature can also be greatly reduced, interface structures of the materials can be effectively controlled, uniform distribution of components can be achieved, and the heat-conducting properties of the materials can be optimized. By adopting the hot isostatic pressing preparation method disclosed by the invention, the molybdenum-copper alloy with high density, high copper content and large size can be successfully prepared, requirements of electronic packaging and heat sink materials for the properties such as material strength and heat conductivity can be met, relatively good market application prospects can be achieved, and the molybdenum-copper alloy is worthy of being popularized and applied in large scale.