6results about How to "Promote recrystallization" patented technology

The invention discloses a method for optimizing parameters for a steel pipe expanding process by using a thermal simulation experiment technology. The method comprises the following steps: S1, sample preparation: cutting out a plurality of cylindrical thermal simulation samples from a target steel pipe; s2, designing a scheme, namely setting a plurality of groups of process parameter combinations including a heating temperature T, a heat preservation time t, a deformation rate epsilon 1 and a deformation epsilon 2; s3, performing thermal compression experiments: performing multiple groups of thermal compression experiments on the sample on a thermal simulation experiment machine according to the parameter combination; s4, structure analysis: analyzing the metallographic structure of the test sample after the experiment, and determining process parameters corresponding to the test sample which is completely recrystallized and has refined grains; and S5, window determination: based on an analysis result of S4, determining an optimal process parameter window for enabling the steel pipe to be subjected to complete recrystallization and grain refinement. The invention further discloses a diameter expanding method. The purpose of the invention is to realize accurate control of the expanding process by combining a thermal simulation experiment with industrial production.

The application provides a biaxial texture nickel oxide buffer layer and a preparation method and application thereof, and relates to the technical field of coated conductor preparation.The preparation method of the biaxial texture nickel oxide buffer layer provided by the application comprises the following steps: performing recrystallization annealing treatment on a nickel alloy in a reducing atmosphere to obtain a biaxial texture nickel alloy; and performing oxidation treatment on the biaxial texture nickel alloy in an oxidizing atmosphere to obtain the biaxial texture nickel oxide buffer layer.The biaxial texture nickel oxide buffer layer is prepared by using a controllable oxidation recrystallization texture method, the prepared biaxial texture nickel oxide buffer layer has good c-axis orientation, low surface roughness, and good in-plane and out-of-plane growth texture.The preparation process is simple, the operation control is simple, the cost is low, the application is environment-friendly, and the application is suitable for large-scale application.

This invention belongs to the field of metallurgical technology, and particularly relates to a 420MPa grade galvanized low-alloy high-strength steel and its production method. The steel composition by mass percentage is as follows: C: 0.06%~0.08%, Si: 0.05%~0.08%, Mn: 0.95%~1.15%, P≤0.025%, S≤0.010%, Al: 0.015%~0.060%, O≤0.0060%, N≤0.0060%, V: 0.01%~0.03%, Ti: 0.01%~0.03%, with the balance being Fe and unavoidable impurities. The advantages are: through V-Ti composite microalloying and controlled hot and cold rolling processes, synergistic effects of fine grain strengthening and precipitation strengthening are achieved. The ferrite grain size is 2~5μm, the (Ti,V)C precipitate size is 20~30nm, the steel plate yield strength is ≥420MPa, and the elongation is maintained above 20%.

The invention provides a chemical polishing post-processing method of a cadmium sulfide thin film, the cadmium sulfide thin film and a device. The chemical polishing post-processing method comprises the following steps: preparing a cadmium sulfide film on the surface of a substrate or a device structure; the cadmium sulfide thin film is immersed in chemical polishing liquid for aftertreatment, and the chemical polishing liquid is configured to selectively dissolve loose particles on the surface of the cadmium sulfide thin film and promote local rearrangement and recrystallization of the cadmium sulfide thin film. The chemical polishing solution removes loose particles, reduces surface roughness, compensates sulfur vacancies and improves compactness and crystal orientation through a mechanism of'selective light dissolution + defect compensation + local recrystallization ', so that the CdS film obtains more excellent material quality. The method is suitable for any device structure containing the CdS thin film such as a solar cell, a photoelectric detector and a thin film transistor, and has the advantages of being high in universality, mild in process, adaptive to various deposition systems and the like.

This invention provides a composite steel plate comprising a base layer and a cladding layer on top of the base layer. The composite steel plate has a thickness of 60-120 mm, the cladding layer is made of stainless steel, the base layer is made of carbon steel, and the bond strength between the base layer and the cladding layer is above 500 MPa. The composite steel plate of this invention exhibits excellent tensile properties, low-temperature impact resistance, and interlayer bonding performance. This invention also provides a method for preparing the above-mentioned composite steel plate.

The application discloses an Al-Mg-Si alloy with micro-nano composite structure and a preparation method thereof. The Al-Mg-Si alloy comprises Mg, Mn, Si, Cu, Fe, Zn, Sc, Zr, Hf and Al. The Al-Mg-Si alloy of some examples of the application contains nano-sized strengthening phases, wherein the average diameter of the Mg2Si phase is 8-10 nm, and the average diameter of the Al3(Sc, Zr, Hf) phase is 15-20 nm. These fine nano second phases can hinder dislocation movement through the Orowan mechanism, thereby strengthening the alloy matrix. The Al3(Sc, Zr, Hf) phase has a coherent interface relationship with the aluminum matrix, and can further improve the mechanical properties of the Al-Mg-Si alloy through the cutting mechanism. The fine grains of double-size grains have obvious strengthening effect, and the coarse / fine distributed grains can coordinate strain and improve the plasticity and toughness of the alloy. The yield strength of the alloy at room temperature is 343-355 MPa, the tensile strength is 368-392 MPa, and the elongation is 11.2-14.6%, so that the alloy can be used as a light structure material for large load requirements.