49results about How to "Taking into account the mechanical properties" patented technology

The invention relates to the field of halogen-free flame-retardant electric wire cable shield materials, in particular to a flexible halogen-free flame-retardant polyphenyl ether electric wire cable shield material and a preparation method thereof. The flexible halogen-free flame-retardant polyphenyl ether electric wire cable shield material is characterized by comprising the following raw materials in percentage: 10 to 30 percent of polyphenyl ether resin; 15 to 35 percent of styrene elastomer; 5 to 10 percent of polyolefin; 8 to 15 percent of plasticizing agent; 3 to 8 percent of compatilizer; 15 to 25 percent of main flame retardant; 2 to 8 percent of synergistic flame retardant; 2 to 8 percent of smoke suppressant; 0.5 to 1 percent of lubricant; 0.5 to 1 percent of antioxygen; and 2 to 3 percent of masterbatch. The flexible halogen-free flame-retardant polyphenyl ether electric wire cable shield material has favorable mechanical property, flexibleness, flame retardant property, heat resistance and processability.

The invention discloses a double-sided titanium steel composite plate taking IF steel as a transition layer and a high-temperature preparation method thereof. A composite blank for preparing the composite plate comprises a base material, the IF steel and a titanium composite material, wherein the base material is plain carbon steel or low alloy steel with C less than or equal to 0.22%, the titanium composite material is industrial pure titanium TA2, the thickness ratio of the base material to the titanium composite material is 5-10, the length and width of the titanium composite material are smaller than those of the base material, and the margin between the titanium composite material and four sides of the base material is 60-100 mm; and the vacuum welded composite blank is heated to 1040-1060 EDG C for heat preservation, the heat preservation time is 1 min/mm * the total thickness of the composite blank, the initial rolling temperature is 1020-1040 DEG C, the single-pass reduction rate is 15%-25%, the total reduction rate is greater than or equal to 70%, the finish rolling temperature is greater than or equal to 850 DEG C, air cooling is carried out to a room temperature, the thickness of the rolled IF steel transition layer is 280-320 [mu]m, and the double-sided titanium steel composite plate with the thickness of 6-75 mm is obtained after plate splitting, and excellent corrosion resistance and mechanical properties are achieved.

A high-efficiency laser deep penetration welding method for achieving double-side forming of sheet metal through single-side welding is characterized in that a reflection cushion plate is added on the back of the laser welding sheet metal to utilize the reflection cushion plate to reflect instantaneous laser of laser full penetration sheet metal back to a welding area to conduct secondary heating on the welding area to further achieve a double-side forming hourglass-shaped (X-shaped) welding seam through single-side welding. The method is mainly composed of steps of cleaning the surface to be welded, fixing the reflection cushion plate, conducting laser welding on the sheet metal and the like. The method achieves the aim that the single-side welding is conducted on the sheet metal to achieve double-side forming under the low heat input condition, breaks through the defect that the existing sheet laser deep penetration welding can obtain the hourglass-shaped (X-shaped) welding seam only under the high heat input condition, achieves double effects of considering welding seam dynamic performance and controlling heat deformation and heat effects of the sheet and lays a foundation for promotion of wide application of a laser deep penetration welding technology in the sheet metal welding field.

The invention discloses cross laminated timber combining fast growing timber material characteristics and meeting building structure requirements and a preparation method thereof, and belongs to the field of timber structures. A laminated board of the cross laminated timber comprises a fast growing timber laminated board with cracks, the fast growing timber laminated board is a whole cracked board, and lengths of all laminated boards of the cross laminated timber are consistent in the horizontal direction. In the preparation method, adjacent layers formed by the fast growing timber laminated board or fast growing timber laminated board combination are assembled and configured in a manner that wood textures are perpendicular to each other in the thickness direction of laminated wood. According to the cross laminated timber combining the fast growing timber material characteristics and meeting the building structure requirements and the preparation method thereof, the material characteristics that the fast growing timber is soft in material and prone to be made into the laminated board with the cracks in a rotary cutting mode are fully utilized, structural stock lumber is replaced for preparing the cross laminated timber, the utilization of the fast growing timber in the field of building structures is expanded, the material cost of a conventional component is greatly reduced, the component preparation process is simplified, the production period is shortened, and the problem that adverse effects on the mechanical property, durability and fireproof performance of the component are caused through gaps in laminated boards of a structural material cross laminated timber component is solved.

The invention discloses a high-performance double-sided titanium steel clad plate taking IF steel as a transition layer, and a preparation method thereof. A composite blank for manufacturing the cladplate includes IF steel, a titanium composite and a base material; the base material is plain carbon steel or low alloy steel with C being less than or equal to 0.22%; the titanium composite is industrial pure titanium TA2, the thickness ratio of the base material to the composite is 5-10, the length and width of the titanium composite are less than that of the base material, and the edge distances of the titanium composite from the four edges of the base material are 60-100 mm; the composite blank after seal welding can be heated to 900-920 DEG C to perform heat preservation, the heat preservation time is 1 min/mm * the total thickness of the composite blank, an initial rolling temperature is 880-900 DEG C, a finish rolling temperature is greater than or equal to 800 DEG C, air cooling can be performed to room temperature, a single pass reduction rate is greater than or equal to 15%, the first three pass reduction rates are greater than or equal to 20%, and the total reduction rate isgreater than or equal to 75%; and the thickness of the produced clad plate is 6-45 mm, and the thickness of an IF steel transition layer is 80-120 [mu]m. Thus, the clad plate is suitable for structures which have corrosion resistance requirements for inner and outer surfaces and consider integral mechanical properties.

The invention belongs to the technical field of composite materials, and particularly relates to cellulose-graphene porous composite aerogel and a preparation method thereof. The product is prepared by the steps of: sequentially taking 80-100 parts by weight of cellulose, 0.5-1.5 parts by weight of graphene oxide with the particle size distribution range of 5-20 nm and 2-5 parts by weight of reduced graphene with the particle size distribution range of 100-500; dissolving the cellulose in an ionic liquid to obtain an ionic liquid solution of cellulose; adding the graphene oxide and the reduced graphene into the ionic liquid solution of cellulose, ultrasonically dispersing well, and dialyzing by using deionized water to remove the ionic liquid, so as to obtain composite hydrogel; and freeze-drying the obtained composite hydrogel to obtain the product. In the obtained product, the graphene material is uniformly dispersed, and a relatively good reinforcing effect can be achieved through a relatively small addition amount.

The invention relates to the technical field of EVA foaming material preparation, and discloses a preparation method of a corrosion-resistant EVA foaming sheet. Thepreparation method comprises the following steps: sufficiently preparing the required materials, and proportionally distributing the required ethylene-octene copolymer (POE) composite foaming material, ethylene-vinyl acetate copolymer (EVA) and EVA grafted maleic anhydride (EVA-g-MA) to obtain the corrosion-resistant EVA foaming sheet. The preparation method comprises the following steps: fully and uniformly mixing 52 parts by weight of EVA, 1-8 parts by weight of EVAgMA and 2-6 parts by weight of POE in an internal mixer. According to the preparation method of the corrosion-resistant EVA foamed sheet, the compatibility of EVA and TPU can be remarkably improved through EVA-g-MA; meanwhile, a POE material with high resilience is introduced, so that the prepared EVA/TPU/POE composite foamed material has good mechanical performance, the tensile strength is 2.09 to 2.44 MPa, the elongation at break is 278.2% to 314.2%, the tearing strength is 4.10 to 5.13 N/mm, and the peel strength is 2.70 to 3.72 N/mm. Meanwhile, the material has good resilience of 55-62%, compression set of 25-42% and low density of 0.2-0.25 g/cm3.