36results about How to "Good impact energy absorption" patented technology

The invention discloses a 780MPa high-plasticity cold-rolled DH steel and a preparation method thereof. Steel contains C: 0.10%~0.18%, Mn: 1.5%~2.5%, Si: 0.4%~0.8%, Al: 0.02%~0.7%, Cr: 0.02%~0.50%, P≤0.01%, S≤ 0.01%, Nb≤0.1%, Ti≤0.1%, and Si+Al: 0.5%~1.5%, the balance is iron and unavoidable impurities. The starting rolling temperature is 1050~1150℃, the final rolling temperature is ≥900℃, the coiling temperature is 550~700℃; the cold rolling reduction rate is 40%~80%; the continuous annealing preheating temperature is 200~600℃, and the annealing temperature is 760~880℃ , annealing time 10-600s, slow cooling outlet temperature 660-760°C, rapid cooling rate>20°C / s, overaging temperature 300-420°C, overaging time 30-3600s; skin elongation 0.3%-0.7%. For parts in the automotive industry that require high formability.

The invention relates to a 600 MPa grade multiphase steel with good flanging performance, and the 600 MPa grade multiphase steel with the good flanging performance comprises the compositions of, by weight, 0.060-0.100% of C, 0.060-0.400% of Si, 1.20-2.00% of Mn, 0.020% or less of P, 0.010% or less of S, 0.015-0.070% of Als, 0.15-0.35% of Cr, 0.010-0.035% of Ti, 0.010-0.035% of Nb and 0.006% or less of N; A production process comprises the steps that according to the composition setting, blank casting is conducted after conventional smelting is conducted; hot rolling process is performed; coldrolling process is performed; the blank casting is naturally cooled to room temperature, and the blank casting is waiting for used. Yield strength is 360 - 440 MPa, tensile strength is 600 ~ 700 MPa,elongation is 19% or above, the hole expansion rate is 45% or above. The microstructure of the 600 MPa grade multiphase steel is pearlite, bainite, ferrite, a small amount of martensite and residual austenite, thus it is ensured that the good forming performance, flanging performance and collision energy absorption performance are achieved while the high strength is achieved.

The invention discloses an automobile collision buffer device, and relates to the technical field of automobiles. Each energy-absorbing cylinder is connected to a spring energy-absorbing cylinder in a clearance fit manner; the spring energy-absorbing cylinder is connected to a hydraulic cylinder sleeve; the energy-absorbing cylinder is disposed in an energy-absorbing beam sleeve in a sliding manner; a spring limit rod is arranged at the bottom end of the energy-absorbing beam sleeve; the ends of the spring limit rod penetrate the energy-absorbing cylinder; push springs are arranged on the portion, under the energy-absorbing cylinder, of the spring limit rod in a penetrating manner; the bottom end of the energy-absorbing cylinder is in plugging connection with bolts; the bolts cooperate with electromagnets; limit pin sleeves are arranged on the upper side wall of the energy-absorbing beam sleeve; each limit pin sleeve is internally provided with a limit pin; a pressure spring is cooperatively arranged between each limit pin and the wall of the corresponding limit pin sleeve; the spring energy-absorbing cylinder is internally provided with energy-absorbing springs which are fixed to a spring positioning disc; and a piston rod is disposed in the hydraulic cylinder sleeve in a penetrating manner. The automobile collision buffer device improves automobile collision energy-absorbing effects, protects an automobile and pedestrians, reduces the damage to the front structure of the automobile, is low is cost, and is high in practicality.

The invention discloses a 780MPa grade alloyed hot-dip galvanized DH steel and a preparation method thereof. Contained in steel, C: 0.11% to 0.17%, Mn: 1.4% to 2.4%, Si: 0.15% to 0.60%, Al: 0.02% to 1.0%, Mo: 0.20% to 0.70%, P≤0.03%, S ≤0.03%, B≤0.005%, V≤0.05%, Ti≤0.05%, the balance is iron and unavoidable impurities. Slab heating temperature 1170-1280°C, starting rolling temperature 1020-1140°C, finishing rolling temperature ≥910°C, coiling temperature 550-700°C; cold rolling reduction 40%-80%; annealing temperature 770-870°C, The annealing time is 30-300s, the galvanizing temperature is 450-470°C, the alloying temperature is 470-530°C, and the holding time is 5-60s. Finished steel plate A 50 20% to 25%, hole expansion rate ≥ 25%, meeting the requirements of high formability and high hole expansion performance of automotive steel.

The invention provides a 1.5GPa grade ultra-high-strength, high-plasticity, and high-hole-expansion DH steel plate and a preparation method. The components of the steel plate are as follows in weight percentage: C: 0.20%-0.26%, Mn: 1.8%-2.8%, Si: 1.0%~2.0%, Al: 0.02%~0.08%, Cr: 0.20~0.80%, P≤0.01%, S≤0.01%, Nb: 0.02%~0.15%, V: 0.02~0.15%, Ti: 0~ 0.10%, the balance is Fe and inevitable impurities; the preparation method includes smelting, continuous casting of medium and thin slabs, hot continuous rolling, pickling and cold rolling, continuous annealing, and smoothing; the yield strength of the steel plate produced by the application of the invention is 1000 ~1350MPa, tensile strength 1470~1650MPa, A80 elongation after fracture ≥9.0%, hole expansion rate ≥15%.