10results about How to "Good weldability" patented technology

The utility model discloses a lithium battery assembly rack convenient for batch processing, and relates to the technical field of lithium battery assembly, the lithium battery assembly rack comprises an assembly rack frame and a heat dissipation fan, one side of the assembly rack frame is provided with a groove, the heat dissipation fan is fixedly connected in the groove, one side of the heat dissipation fan is fixedly connected with a dustproof net, and the dustproof net is fixedly connected with a motor. The lithium battery assembling frame comprises an assembling frame body, the bottom of the assembling frame body is fixedly connected with a support, the top of the assembling frame body is fixedly connected with a driving mechanism, and the left side and the right side of the assembling frame body are each provided with two sets of grooves. The welding degree is improved, meanwhile, the machining efficiency is improved, the labor input cost is reduced, the positioning mechanism is arranged on one side of the lithium battery body, after each string of lithium batteries are fixed, a nickel sheet insulating material in the positioning mechanism is used for separating each string of lithium batteries, and the situation that short circuit occurs later due to the fact that the outer skin of the lithium battery body is damaged is prevented.

The invention belongs to the technical field of high-strength and tough aluminum alloy profiles, and discloses a high-strength and tough aluminum alloy and a hollow structural profile and a preparation method thereof, wherein the high-strength and tough aluminum alloy comprises Si: 0-0.35; Fe: 0-0.4; Cu: 0.25-0.35; Mn: 0.3-0.5; Mg: 1.2-1.8; Cr: 0.1-0.2; Zn: 3.5-5.0; Zr: 0.05-0.2; Ti: 0-0.1; the remainder is aluminum and other inevitable impurity elements, and the content of the other inevitable impurities is less than 0.2. The aluminum alloy after optimizing the alloy composition of the invention not only has excellent welding performance, but also has excellent mechanical properties, and it is easy to prepare a high-strength and tough aluminum alloy hollow structural profile. The prepared hollow structural aluminum alloy profile has a yield strength greater than 340MPa, a tensile strength greater than 400MPa, and an elongation greater than 10%.

The invention discloses low-C-high-Mn-Ni-Cu corrosion-resistant L555-grade subsea pipeline steel and a preparation method thereof, belongs to the technical field of subsea pipeline steel manufacturing, and aims to solve the technical problem that existing L555-grade pipeline steel is poor in corrosion resistance and low-temperature toughness. The low-C high-Mn-Ni-Cu corrosion-resistant L555-grade subsea pipeline steel provided by the invention is prepared from the following components in percentage by mass: 0.031 to 0.045 percent of C, 2.00 to 2.10 percent of Mn, 0.15 to 0.22 percent of Si, 0.60 to 0.80 percent of Ni, 0.31 to 0.40 percent of Cu, 0.15 to 0.20 percent of Cr, 0.020 to 0.030 percent of Nb, 0.010 to 0.015 percent of Ti, less than or equal to 0.008 percent of P, less than or equal to 0.002 percent of S, less than or equal to 0.004 percent of N and the balance of Fe and inevitable impurities. The L555-grade subsea pipeline steel provided by the invention has good corrosion resistance and low-temperature toughness, and is suitable for deepwater drilling riser main pipes and other pressure-bearing service components.

An embodiment of the present invention relates to a cylindrical secondary battery which may comprise: a cylindrical can; an electrode assembly accommodated in the can and formed by stacking a first electrode plate, a separator, and a second electrode plate and winding in a cylindrical shape, wherein a first electrode uncoated portion of the first electrode plate protruding at one end in the longitudinal direction and a second electrode uncoated portion of the second electrode plate protruding at the other end thereof; a cap assembly coupled to one side of the can in a state in which the electrode assembly is accommodated in the can; a first electrode current collector plate which is located between the first electrode uncoated portion and the can and electrically connected to the first electrode uncoated portion and the cap assembly; a second electrode current collector plate which is located between the second electrode uncoated portion and the cap assembly and electrically connected to the second electrode uncoated portion and the can; a first auxiliary plate which is located between the first electrode uncoated portion and the first electrode current collector plate and electrically connected to the first electrode uncoated portion and the first electrode current collector plate; and a second auxiliary plate which is located between the second electrode uncoated portion and the second electrode current collector plate and electrically connected to the second electrode uncoated portion and the second electrode current collector plate.

This utility model discloses a composite water-cooled plate for a battery tray and the battery tray itself. The composite water-cooled plate includes: a water-cooled channel plate with a recessed water channel groove on one side; and a water-cooled cover plate, which is a composite plate formed by a first plate layer and a second plate layer. The cover plate covers the water-cooled channel plate, and the first plate layer and the water-cooled channel plate are connected by resist welding. A cooling water flow channel for heat exchange is formed between the water-cooled channel plate and the water-cooled cover plate. This utility model, by using a water-cooled plate composed of stainless steel plate and steel-aluminum composite plate, increases the overall structural strength, solves the problem of poor structural strength in existing all-aluminum liquid cooling plates, improves its load-bearing capacity and the protection level of the battery tray, and ensures the safe operation of the battery pack.

The utility model relates to the technical field of building structure design, in particular to a box-shaped aluminum alloy component and steel component rigid connection joint structure which comprises a box-shaped steel component, a box-shaped aluminum alloy component and a connecting assembly. The connecting assembly comprises a steel corbel and a plurality of connecting plates, one end of the steel corbel is connected with the box-shaped steel component in a welded mode, and the other end of the steel corbel is connected with the box-shaped aluminum alloy component in a welded mode. And one end of the connecting plate is attached to and connected with the outer wall of the box-shaped aluminum alloy component, and the other end of the connecting plate is attached to and connected with the outer wall of the steel corbel. Due to the fact that aluminum alloy welding is difficult, the strength after welding is greatly reduced, and welding difficulty and manufacturing cost are high, the steel corbel is arranged between the box-shaped steel component and the box-shaped aluminum alloy component for transfer connection, the technical problem that the steel component and the aluminum alloy component are difficult to reliably and rigidly connect is solved, the whole joint structure is high in assembly degree, high in machining and manufacturing precision and low in cost. And construction and installation are convenient.

The present invention provides a Zn-Mg-Al-based plated steel sheet excellent in corrosion resistance and excellent in at least one of weldability and phosphatability, and a manufacturing method therefor.

The present invention belongs to the field of greenhouse heating technology, specifically a greenhouse enclosure curtain wall with active heat storage and its greenhouse back wall and wall material. The curtain wall system of the present invention is composed of an XPS-PVC greenhouse back wall, a black film, an upper water pipe, a return pipe, and a water tank equipped with a water pump. Water is injected from the upper water pipe and flows between the wall and the black film, and is guided back to the water tank equipped with a water pump by the return pipe. The XPS-PVC composite wall material of the present invention uses PVC as a finishing layer, and flame-retardant XPS is sandwiched in the middle as an insulation layer. The XPS-PVC greenhouse back wall of the present invention is borne by a greenhouse steel frame to bear the greenhouse load, and multiple pieces of XPS-PVC composite wall materials are spliced ​​into wall panels and fixed on the steel frame of the north wall of the greenhouse. The curtain wall system of the present invention can complete the process of active heat storage and release by directly using the wall, without the need to set up a separate heat collection system, occupying less space, low cost, and easy to promote.

The invention discloses a preparation method of corrosion-resistant L555-grade subsea pipeline steel, belongs to the technical field of subsea pipeline steel manufacturing, and aims to solve the problem that the strength, toughness and corrosion resistance of pipeline steel are difficult to synergistically improve due to insufficient tissue regulation and control capability in an existing L555-grade pipeline steel preparation method. The invention provides a preparation method of corrosion-resistant L555-grade subsea pipeline steel. The preparation method comprises the following steps: step 1, smelting and continuous casting process; step 2, controlling a rolling process; the method comprises the following steps: firstly, heating a continuous casting billet to 1180 + / -10 DEG C, and preserving heat for 30-60 minutes; step 3, a third-stage temperature control cooling process; the rolled plate blank is sequentially subjected to first-stage rapid cooling, second-stage medium-speed cooling-isothermal keeping stage and third-stage air cooling treatment; 4, the rolled subsea pipeline steel is subjected to online self-tempering treatment; the on-line self-tempering treatment process comprises the following steps: after cooling, carrying out on-line tempering treatment on the steel plate at 450-480 DEG C for 3-8 minutes. The corrosion resistance of the L555-grade subsea pipeline steel can be remarkably improved.

The invention discloses a method for producing H08A semi-killed low-silicon welding rod steel by adopting a small square billet process, and belongs to the technical field of ferrous metallurgy. The method comprises the four procedures of converter smelting, LF refining, continuous casting and rolling, by optimizing the technological parameters of all the procedures, precise control over the silicon content and effective removal of inclusions are achieved, and the product quality stability is improved; the sulfur content and the phosphorus content are both smaller than or equal to 0.030%, the inclusion rating is smaller than or equal to 1.5 grade, and the purity of the welding rod steel is improved; the silicon mass fraction is stabilized at 0.03-0.07%, and the problem that the welding performance is poor due to the fact that the silicon content in a traditional process exceeds the standard is solved.