3results about How to "Shallow depth" patented technology

This invention relates to a steel for automobile engine pistons and its manufacturing method. The chemical composition of the steel, by weight percentage, is: C: 0.41–0.47%, Si: 0.15–0.35%, Mn: 0.70–1.00%, Cr: 1.10–1.40%, P: ≤0.020%, S: 0.015–0.035%, Mo: 0.17–0.27%, Al: 0.010–0.030%, N: 0.0040–0.0060%, with the balance being Fe and unavoidable impurities. The microstructure consists of ferrite and pearlite, with uniform distribution of ferrite and pearlite structures. The geometric center distance between each ferrite and pearlite structure is 15–30 μm. The hot-rolled hardness of the steel is ≤230 HBW, and the banded structure in the steel is ≤1.5 grade. The product features a narrow range of carbon deviation in cross-section, shallow decarburized layer and microcrack depth on the steel surface, low hot-rolled hardness, good banded structure, and high tensile strength after quenching and tempering.

The invention provides a mother battery piece, a battery piece, a preparation method of the mother battery piece and a photovoltaic module. The battery piece comprises a first semiconductor substrate, the first semiconductor substrate comprises a first surface, a second surface and a side surface, the first surface and the second surface are oppositely arranged, the side surface is connected with the first surface and the second surface, and the first surface comprises a central region and a first isolation region arranged around the central region; the first doped semiconductor layer is arranged in the central region; the isolation groove is formed in the first isolation area and surrounds the central area; the tunneling passivation contact structure is at least arranged on the second surface; the first substrate doping layer is arranged on at least part of the side surface; the first passivation layer at least covers the first doped semiconductor layer, the isolation groove and the first substrate doped layer; the battery efficiency can be improved, and the manufacturing cost can be reduced.

This invention relates to the technical field of elevator buffers, and discloses an eddy current damping energy-dissipating elevator buffer. The invention includes an outer buffer tube and a mounting chamber formed within the outer buffer tube. This invention achieves the effect of a novel buffer through a stationary / moving component, making it suitable for elevators at any speed. Its damping force increases with speed, thereby improving the buffering effect. The eddy current damping characteristic enables a rebound-free buffering process. The eddy current damping force moves in the opposite direction to the moving component, preventing the moving component from rising again. Furthermore, the eddy current damping force itself is a dissipative damping force, preventing the generation of reaction force and achieving a smooth buffering process. A reset component ensures smooth buffer movement and post-movement reset. Simultaneously, the buffer stroke is short, and the pit depth is shallow, saving installation space.