4results about How to "Adjust cooling speed" patented technology

The application discloses a heat treatment method of a titanium alloy material for an aviation aircraft, and comprises the following steps: S1, heating forging; S2, die forging; and S3, double annealing heat treatment. The heat treatment method optimizes and adjusts the heat treatment process in the preparation process of the TC21 titanium alloy, mainly optimizes and adjusts the cooling mode, the holding time and other parameters of the double annealing, so that the cooling speed is adjusted, the secondary lamellar or spherical alpha phase is obtained in the first annealing, the acicular alpha phase is obtained in the second annealing, the strength of the titanium alloy is improved through the content of the alpha phase, and the prepared TC21 titanium alloy meets the high performance requirements of strength greater than or equal to 1200 MPa, yield greater than or equal to 1100 MPa and A greater than or equal to 8.

The application belongs to the technical field of laser additive manufacturing, and particularly relates to an array type laser additive manufacturing method and device, which comprises the following steps: S1, digital model import and layering slicing; S2, scanning path planning and filling setting; S3, array type laser synchronous output control; S4, powder flow and powder feeding path control; S5, according to the width of the additive, the width of single track cladding is adjusted in real time; S6, according to the slice layer material of the additive, the matching material is delivered; S7, S1-S6 are repeated, and layer-by-layer accumulation is performed until the part manufacturing is completed. The application can accurately control the grain size, improve the material microstructure, and improve the mechanical properties; the generation of defects such as thermal cracks and pores is reduced, the stability of the deposition process is ensured; the interlayer bonding is optimized, the quality of multi-layer deposition is ensured; the residual stress is reduced, the size precision, shape stability and fatigue performance of the part are improved; the post-processing requirement is reduced, and the processing cost is reduced.

The utility model discloses a liquid nitrogen quick-cooling device for aquatic products, and relates to the technical field of quick-cooling of aquatic products. The liquid nitrogen rapid cooling device for the aquatic products comprises a base, a shell is fixedly installed on the upper surface of the base, a cooling conveying assembly is arranged in the shell, a feeding adjusting assembly is arranged on one side of the shell, and the cooling conveying assembly comprises a buffer spring fixedly installed on the inner bottom wall of the shell; the top of the buffer spring is fixedly provided with a guide plate, the inner bottom wall of the shell is fixedly provided with a vibration motor, the top of the vibration motor makes contact with the bottom of the guide plate, the top of the shell is fixedly provided with a water pump, and an output shaft of the water pump is fixedly provided with a nitrogen conveying pipe. In the using process, aquatic products can make more sufficient contact with liquid nitrogen after entering the device, so that quick cooling is more uniform, the cooling speed of the aquatic products is increased, and meanwhile the using convenience of the device is improved.

The utility model discloses a reaction-controllable portable chemical hydrogen production device which comprises at least one reactor and at least one carbon purifier, a hydrogen output port of the reactor is connected with a hydrogen input port of the carbon purifier through a pipeline, and a hydrogen filtering device is arranged in the hydrogen output port of the reactor; the reactor comprises an inner cavity, an outer sleeve sleeved outside the inner cavity and a heat insulation cylinder sleeved outside the outer sleeve, a phase change heat storage material is filled between the inner cavity and the outer sleeve, the height of the heat insulation cylinder can be adjusted, and the coverage range of the heat insulation cylinder outside the outer sleeve can be adjusted by adjusting the height of the heat insulation cylinder; and a feeding valve is arranged on the feeding pipeline. According to the utility model, the temperature in the inner cavity can be better adjusted through matched adjustment in the aspects of heat storage and heat dissipation, so that the chemical reaction rate of reactants in the reactor is controlled and adjusted.