45results about How to "Improve interface bonding quality" patented technology

The invention relates to a method for preparing a high-performance composite strip through pulse current asymmetrical rolling. The method comprises the steps that surfaces, subjected to surface treatment, of a strip A and a strip B are stacked, wherein the surfaces subjected to surface treatment are opposite to each other; at a rolling inlet, pulse current is applied to an A / B composite strip, thelocal area of the material surface is subjected to discharging, and surface metal is melted; the A / B composite strip obtained after pulse current treatment is subjected to asymmetrical rolling, material interface seaming is conducted, the differential speed ratio range is adjusted, and uniform deformation of the strip A and the strip B is achieved; the step is repeated 2-3 times; the obtained A / Bcomposite strip is subjected to asymmetrical rolling till the total reduction rate of the strip reaches 85%-90%. According to the composite metal material prepared through the method, the interface bonding quality is greatly improved compared with the interface of the composite metal material prepared through a traditional rolling method, and the high-performance composite metal strip can be usedfor the fields of bulletproof protection, aerospace, sound insulation and noise reduction, automobile weight lightening and the like.

The invention relates to a dual-effect well-cementing pad fluid using a suspending agent as a surfactant, and mainly solves problems that present well-cementing pad fluid is added with high-molecular polymer grade inorganic suspending agent which can influence compatibility and cement sheath cementation and thus influence sealing effect of well cementing and exploitation operation in a later stage. The dual-effect well-cementing pad fluid comprises the following components by weight parts: 12-20 parts of a flushing suspending agent, 0.2-1 part of an antifoaming agent, 0-420 parts of a weighting agent and 100 parts of water. The dual-effect well-cementing pad fluid using a suspending agent as a surfactant can eliminate adverse influences of inorganic soil and the high-molecular polymer in the well-cementing pad fluid on the compatibility and the cement sheath cementation, improve flushing and displacing effects on a drilling fluid, and guarantee quality of well cementing and the exploitation operation in the later stage.

The invention discloses a method for reinforcing a magnesium alloy compound material through zinc oxide-covering graphene. The method comprises the following steps that a liquid-state dispersion method is adopted for firstly preparing a preform green body with a mass ratio of the zinc oxide-covering graphene to pure aluminum powder equal to 10-25%, then the preform green body is added into magnesium alloy melt, and after ultrasonic dispersion treatment with power of 500-1000 W is conducted for 120 min, under a condition of 550-630 DEG C, a casting method is adopted for preparing the AZ91 magnesium alloy compound material reinforced by the zinc oxide-covering graphene with a content of 0.1-5%. By means of the method for reinforcing the magnesium alloy compound material through the zinc oxide-covering graphene, the even dispersion of the graphene in a magnesium matrix can be effectively improved, the interface bonding quality of the graphene and the magnesium matrix is improved, meanwhile, a good crystal grain refining effect is obtained, and the mechanical performance of the compound material is greatly improved, so that the method for reinforcing the magnesium alloy compound material through the zinc oxide-covering graphene is suitable for preparing the graphene-magnesium alloy compound material excellent in performance on a large scale.

The invention relates to a short-flow efficient production process of a double-metal composite belt material. The short-flow efficient production process of the double-metal composite belt material comprises the following steps: preparing a high-quality double-metal composite plate blanket with a metallurgical bonding interface by a continuous casting composite process and putting the high-qualitydouble-metal composite plate blanket into a heating furnace to heat; performing multi-pass rolling on the heated plate blanket by a rolling machine, wherein the pass reduction rate of the first passis controlled to be 50 to 70 percent, the pass reduction rate of the subsequent passes is controlled to be 25 to 45 percetn and the total rolling deformation quantity is controlled to be 85 to 95 percent; performing warm rolling forming, wherein the rolling process avoids lubrication; after performing acid-washing treatment, performing rolling forming on a cold-rolling machine, wherein the pass reduction rate is controlled to be 15 to 30 percent, the total rolling deformation quantity is controlled to be less than 90 percent and the rolling speed is 1 to 25 m / min; and performing rapid sensingheating continuous heat treatment on the composite belt material after cold rolling to obtain the double-metal composite belt material. The plate material prepared by the method is short in process flow, high in production efficiency and favorable for realizing large-scale production.

The invention provides a sandwiched composite heat insulating layer structure and a preparation method thereof. The preparation method comprises the following steps of: pasting a heat insulating layer, an ablation resistant layer and a transition layer in an engine combustion chamber housing, wherein the heat insulating layer and the transition layer are made of a heat insulating layer material ofan ethylene-propylene-diene monomer system, the ablation resistant layer is made of a carbon fiber phenolic aldehyde butyronitrile rubber soft sheet material, and the ablation resistant layer is divided into a plurality of pieces in a peripheral direction in the engine combustion chamber housing; and performing hot-pressing after pasting each layer, pre-drying the material of the ablation resistant layer before use, and curing a carbon rough board of the ablation resistant layer and the heat insulating layer before pasting the transition layer. The sandwiched composite heat insulating layer structure can improve integrity of the composite heat insulating layer, and strengthens reliability of a composite interface.