Abstract: The present disclosure provides a 6XXX aluminum alloy sheet capable of reducing liquefying cracks in weld seams, a preparation method and application thereof. The aluminum alloy sheet includes 0.4-0.8% of Si, 0.1-0.35% of Fe, 0.08-0.2% of Mn, 0.45-0.9% of Mg, and ?0.2% of Cu, with the total weight percentage of Mn and Cu being ?0.2%. The preparation method includes subjecting raw materials to melting and casting, homogenization treatment, hot rough rolling, hot finish rolling, and cold rolling sequentially, to obtain a cold rolled sheet, then carrying out heat preservation at 550-560° C. for 20-30 seconds and 60-70° C. for 20-28 hours. In the present disclosure, the 6XXX aluminum alloy sheet prepared by controlling a specific proportion of aluminum alloy elements and combining with a specific solution and aging treatment process has good weldability, which can effectively reduce the liquefying cracks and enhance the mechanical properties of joints.

Abstract: The present disclosure provides an optical aluminum alloy and a preparation method thereof. The preparation method includes the following steps: step S1, preparing an original aluminum alloy cast ingot from raw materials by adopting a semi-continuous casting process; step S2, subjecting the original aluminum alloy cast ingot to homogenization, head and tail cutting and skin turning, to obtain a surface treated alloy raw material; step S3, subjecting the surface treated alloy raw material to rapid solidification treatment through a melt spinning method to obtain a rapid solidification alloy strip; step S4: subjecting the rapid solidification alloy strip to crushing treatment and then to sheathing and cold pressing, to obtain a cold pressed blank; step S5, subjecting the cold pressed blank to 1-2 passes of hot extrusion procedures to prepare a bar; and step S6, subjecting the bar to solution treatment and aging treatment, to obtain the finished aluminum alloy material.

Abstract: The present disclosure provides a 5XXX aluminum alloy capable of refining MIG weld grains and a preparation method and application thereof. The 5XXX aluminum alloy includes the following compositions in percentage by weight: 4.0-4.9% of Mg, 0.2-0.5% of Mn, 0.01-0.06% of Ti, 0.1-0.35% of Fe, less than 0.05% of B, and the balance of Al and inevitable impurities. The preparation method includes subjecting raw materials to casting to obtain an ingot, where the Ti is added through an Al-5Ti-1B intermediate alloy at 750-770° C.; subjecting the ingot to homogenization treatment at 500-520° C. for 3-5 h; and subjecting the ingot to hot rolling, cold rolling and annealing. The 5XXX aluminum alloy of the present disclosure can effectively adjust the grain size in a weld zone and a fusion zone when applied to MIG welding, grains in the weld zone are refined to 30-40 ?m, and the weld strength is greatly improved.

Abstract: The disclosure provides a battery pack frame, a frame set, and a new energy heavy truck. The battery pack frame includes a frame body formed by connecting a plurality of frame beams end to end. The battery pack frame includes a plurality of adapter assemblies for pre-mounting two adjacent frame beams. At least one adapter assembly is arranged between any the two adjacent frame beams, and each adapter assembly includes a threaded connection assembly and an inserting limiting assembly, the inserting limiting assembly being configured to limit relative positions of the two adjacent frame beams, the threaded connection assembly being configured to pre-connect the two adjacent frame beams, and the two adjacent frame beams being pre-mounted through the each adapter assembly and then welded. By using the solution, the tangential force that the two adjacent frame beams may withstand after being connected is improved.

Abstract: Provided is a method for measuring residual stress in a thin plate. The method includes: S1: prearranging and cutting a plurality of fins, computing x-direction strain ?i0 and x-direction residual stress ?i0 in the length direction of the thin plate borne by each fin, and obtaining distribution of x-direction residual stress in the width direction of the thin plate according to all ?i0; S2: repeatedly cutting the fixed ends in a thickness direction of the thin plate, computing a total cutting depth Zij and x-direction residual stress ?ij of each fin after each cutting, and obtaining distribution of x-direction residual stress in the thickness direction of the thin plate borne by an ith fin according to all ?ij; and S3: computing distribution ?x, ?x=?i0+?ij, of x-direction residual stress on a yz cross section of the thin plate according to ?i0 obtained in S1 and corresponding ?ij in S2.

Abstract: An image construction method and system for a heating area is provided. The method includes: obtaining an initial image according to a heating structure diagram and a building structure diagram of the heating area; segmenting the initial image according to heating attribute of the heating area to obtain a plurality of segmentation sub-graphs; performing first collection on a surface temperature of a heating pipeline according to pre-deployed surface devices corresponding to the segmentation sub-graphs, and setting first heating labels corresponding to the segmentation sub-graphs, and meanwhile, performing second collection on a regional temperature of a sub-area of the heating pipeline being located according to a pre-deployed monitoring device corresponding to the segmentation sub-graphs, and setting second heating labels; performing position and temperature analysis on a label setting result of each of the segmentation sub-graphs to obtain a heating image of the heating area.

Abstract: An image construction method and system for a heating area is provided. The method includes: obtaining an initial image according to a heating structure diagram and a building structure diagram of the heating area; segmenting the initial image according to heating attribute of the heating area to obtain a plurality of segmentation sub-graphs; performing first collection on a surface temperature of a heating pipeline according to pre-deployed surface devices corresponding to the segmentation sub-graphs, and setting first heating labels corresponding to the segmentation sub-graphs, and meanwhile, performing second collection on a regional temperature of a sub-area of the heating pipeline being located according to a pre-deployed monitoring device corresponding to the segmentation sub-graphs, and setting second heating labels; performing position and temperature analysis on a label setting result of each of the segmentation sub-graphs to obtain a heating image of the heating area.

Abstract: The disclosure relates an Al—Mg series aluminum alloy sheet, a preparation method and use thereof. The preparation method includes: step S1, melting and casting the alloy raw materials in sequence to obtain an aluminum alloy ingot; step S2, subjecting the aluminum alloy ingot to a two-stage homogenization treatment so as to obtain a homogenized aluminum alloy ingot; and step S3, subjecting the homogenized aluminum alloy ingot to hot rolling, primary cold rolling, intermediate annealing, final cold rolling, and finished product annealing in sequence to obtain the aluminum alloy sheet.

Abstract: An LED human centric lighting device includes a substrate, an LED light emitting chipset and at least two blue light chipsets with different color temperatures arranged on the substrate, a fluorescent colloid and an enclosure. The LED light emitting chipset includes multiple LED light emitting chips, and each of the blue light chipsets includes multiple blue light emitting chips with same color temperature. Each of the blue light chipsets forms a color temperature light emitting area, and the different color temperature light emitting areas are separated by the enclosure. The substrate is provided with a control circuit for controlling light emission of the corresponding color temperature light emitting area, and the fluorescent colloid is arranged in the enclosure. The LED light emitting chip and at least two blue light emitting chips with different color temperatures are assembled in the device, which can reduce a volume of the device.

Abstract: An in-situ tensile device for X-ray tests is provided, including: a frame including a connecting structure, where the connecting structure is configured to fixedly connect to a testing bench of a testing device; a stretching mechanism, disposed on the frame; a clamping mechanism, including two clamping assemblies arranged opposite to each other in a length direction; where the two clamping assemblies are configured to clamp two ends of a testing piece, the testing piece is provided with a testing surface, and the testing surface is disposed on surfaces of the two clamping assemblies; the stretching mechanism is drivingly connected to the two clamping assemblies to enable the two clamping assemblies to move synchronously in one of a direction approaching each other and a direction far away from each other; and the two clamping assemblies are detachably connected to the stretching mechanism. The device can improve the accuracy of test results.

Abstract: An in-situ tensile device for X-ray tests is provided, including: a frame including a connecting structure, where the connecting structure is configured to fixedly connect to a testing bench of a testing device; a stretching mechanism, disposed on the frame; a clamping mechanism, including two clamping assemblies arranged opposite to each other in a length direction; where the two clamping assemblies are configured to clamp two ends of a testing piece, the testing piece is provided with a testing surface, and the testing surface is disposed on surfaces of the two clamping assemblies; the stretching mechanism is drivingly connected to the two clamping assemblies to enable the two clamping assemblies to move synchronously in one of a direction approaching each other and a direction far away from each other; and the two clamping assemblies are detachably connected to the stretching mechanism. The device can improve the accuracy of test results.

Abstract: The present invention discloses a method of producing potassium sorbate particles, comprising the steps of: (1) preparing a potassium sorbate solution; (2) spray drying; (3) spray forming; (4) indirectly drying with steam on a vibration fluidized bed; and (5) swing-type sifting; in step (3), a binder is obtained by spray drying after adding sorbitol to the potassium sorbate solution prepared in step (1), and the binder is mixed with the potassium sorbate powder obtained by spray drying in step (2) to undergo the spray forming process; based on weight ratio, the weight ratio of the sorbitol required to prepare the binder to the potassium sorbate solution required to prepare the binder is 0.05-0.1%:1. The beneficial effects of the present invention are: an appropriate binding effect of the powder particles, a good breaking effect and a good spheronization effect of the powder particles, and uniformity of granulation.

Abstract: The present invention discloses a method of producing potassium sorbate particles, comprising the steps of: (1) preparing a potassium sorbate solution; (2) spray drying; (3) spray forming; (4) indirectly drying with steam on a vibration fluidized bed; and (5) swing-type sifting; in step (3), a binder is obtained by spray drying after adding sorbitol to the potassium sorbate solution prepared in step (1), and the binder is mixed with the potassium sorbate powder obtained by spray drying in step (2) to undergo the spray forming process; based on weight ratio, the weight ratio of the sorbitol required to prepare the binder to the potassium sorbate solution required to prepare the binder is 0.05-0.1%:1. The beneficial effects of the present invention are: an appropriate binding effect of the powder particles, a good breaking effect and a good spheronization effect of the powder particles, and uniformity of granulation.

Abstract: The present invention provided with a power adapter comprises a housing and a power conversion circuit board mounted in the housing. The housing comprises a body, which is a generally cylindrical shell having an accommodating space, an open end and an opposite closed end, wherein the closed end and the cylindrical shell are formed into a one-pieced, integrated structure, The housing also comprises a side dead wall mounted at and adapted to the open end. The power conversion circuit board has a first end connected to the side dead wall and a second end connected to the closed end, wherein the power conversion circuit board is fixedly accommodated within a confined space enclosed by the side dead wall and the body of the housing.

Abstract: The present invention provided with a power adapter comprises a housing and a power conversion circuit board mounted in the housing. The housing comprises a body, which is a generally cylindrical shell having an accommodating space, an open end and an opposite closed end, wherein the closed end and the cylindrical shell are formed into a one-pieced, integrated structure, The housing also comprises a side dead wall mounted at and adapted to the open end. The power conversion circuit board has a first end connected to the side dead wall and a second end connected to the closed end, wherein the power conversion circuit board is fixedly accommodated within a confined space enclosed by the side dead wall and the body of the housing.

Abstract: A method and system for controlling stereoscopic menu display and a mobile communication terminal are provided. Wherein, the method includes: generating and displaying a stereoscopic menu including icons; obtaining a moving track inputted by a user; determining the corresponding rotation tangent planes, rotation directions and rotation speed of the icons in the stereoscopic menu according to coordinates of various points; controlling each icons in the stereoscopic menu to rotate in rotation direction at the rotation speed on the corresponding rotation tangent planes; detecting whether a recovery signal inputted by the user is received, if yes, controlling the stereoscopic menu recovery display according to the icon recovery signal.

Abstract: The present invention relates to a new fluidized-bed catalyst used in a process of propylene ammoxidation to acrylonitrile. The catalyst comprises a silica as carrier and a composition represented by the following general formulas: AaBbCcGedNaeFefBigMohOx Wherein A represents at least one element selected from a group consisting Li,K,Rb,Cs,Sm, In or Tl; B represents at least one element selected from a group consisting of P, Sb, Cr, W. Pr, Ce, As, B, Te, Ga, Al, Nb, Th, La or V; C represents one element selected from a group consisting of Ni, Co, Sr, Mn, Mg, Ca, Zn, Cd or Cu and the mixture thereof; a is a number of from 0.01 to 1.5; b is a number of from 0.01 to 3.0; c is a number of from 0.1 to 12.0; preferably from 2 to 10; d is a number of from 0.01 to 2.0; preferably from 0.01 to 1.0; e is a number of from 0.01 to 0.7; preferably from 0.05 to 0.5; f is a number of from 0.1 to 8; preferably from 1.0 to 3.0; g is a number of from 0.01 to 6; preferably from 0.1 to 2.