4results about How to "Adjust mechanical properties" patented technology

The invention provides a preparation method of a high-strength and high-bending-angle aluminum alloy, which comprises the following steps: S1, respectively weighing raw materials according to the mass percent of elements in the aluminum alloy, heating and melting the raw materials into melt, and then deslagging, refining and removing impurities to obtain aluminum alloy melt; s2, casting the molten aluminum alloy to obtain an aluminum alloy round casting rod; s3, the aluminum alloy round casting rod is homogenized, and a long aluminum alloy round casting rod is obtained; s4, cutting the aluminum alloy round casting rod to obtain an equal-length aluminum alloy short casting rod suitable for extrusion; s5, the aluminum alloy short casting rod is heated and then subjected to high-temperature extrusion, online quenching is conducted while extrusion discharging is conducted, and a quenched profile is obtained; and S6, the quenched profile is subjected to two-stage overaging heat treatment, and the high-strength and high-bending-angle aluminum alloy is obtained. The mechanical performance of the product is adjusted according to the characteristics that the aluminum alloy has the same alloy components and the same processing technology, the aging performance peak value is basically consistent, and the performance is reduced during overaging of the aluminum alloy, so that the requirement of the bending angle is met.

A golf club head alloy is provided to solve the problem that the existing alloy cannot be used to make a striking face plate. The golf club head alloy includes 11-13% by weight of molybdenum, 5-7% of zirconium, 0.5-2.5% of iron and 3-4% of aluminum, and the golf club head alloy further includes a balanced amount of titanium and inevitable impurities. Through the above-mentioned composition, the hard and brittle phase of the golf club head alloy can be reduced, so that the striking face plate made of the golf club head alloy can pass the golf ball impact test, and whether the striking face plate is heat treated is determined according to the needs of the user, so that the striking face plate can have high rebound performance or high strength characteristics. The present application also relates to a method for manufacturing a golf club head from the golf alloy.

The present invention relates to the field of polyurethane materials, and in particular to a lignin-based polyurethane material and a preparation method thereof. The lignin-based polyurethane material is obtained by blending a modified polyurethane elastomer with polylactic acid, wherein the modified polyurethane elastomer is obtained by polymerization and crosslinking of hydroxyl groups in a lignin oligomeric polyol, a chain extender, and polylactic acid diol with isocyanate groups in a diisocyanate, respectively, and the chain extender contains at least two hydroxyl groups in the molecule. A lignin oligomeric polyol is obtained and polymerized with diisocyanate to obtain a prepolymer, and the prepolymer is further polymerized into a polymer by a chain extender, and then polylactic acid diol is introduced and cured to obtain a modified polyurethane elastomer, and a lignin-based polyurethane is obtained by blending with polylactic acid. The lignin-based polyurethane material can reduce the waste of petroleum resources and can maintain a high wear resistance.

This invention belongs to the field of polymer functional materials technology, specifically relating to a biodegradable light-converting film with intrinsic fluorescence and its applications. The biodegradable light-converting film is prepared from a biodegradable copolyester with aggregation-induced emission properties. The biodegradable copolyester is polymerized from a polymerizable monomer, a first monomer providing rigid conjugated units, and a second monomer providing flexible spacer units. In the main chain structure of the biodegradable copolyester, the longest linear spacer segment between any two adjacent rigid conjugated units derived from the first monomer has ≥10 carbon atoms. Through precise molecular structure design, the aggregation-induced emission properties are chemically bonded to the biodegradable polyester main chain, fundamentally solving the problems of easy migration, aggregation quenching, and high cost of the light-converting agent in traditional additive-type light-converting films. This light-converting film exhibits efficient and stable intrinsic fluorescence in the solid state, with tunable fluorescence color, and possesses good mechanical properties and biodegradability.