156results about How to "Intensity unchanged" patented technology

The invention relates to calcium aluminate cement containing nanometer-sized calcium carbonate and a preparation method thereof. The preparation method of the calcium aluminate cement containing nanometer-sized calcium carbonate is based on calcium aluminate used in prior refractory material by adding nano calcium carbonate powder and alumina micropowder. The invention solves the shortcoming of low mid-temperature strength in prior calcium aluminate, and particularly greatly improves the strength around 800 DEG C. The monolithic refractory containing the combined nanometer-sized calcium carbonate has a small change in cold strength under 800 DEG C and 1600 DEG C burning, and the strength of the cold state and the hot state is greatly increased compared with that of prior ordinary monolithic refractory containing the same quantity of CaO made by combining calcium aluminate cement. The invented nanometer-sized calcium aluminate cement containing calcium carbonate can be broadly used in producing refractory material such as refractory casting material, spray material, etc., and can greatly improve mid-temperature strength of material.

The invention relates to a novel environment friendly plastic. The plastic is characterized in that: the plastic comprises a high-nutrient biodegradable material which comprises residual sludge particles, sodium hydroxide and plant starch, an intensity supplement material which comprises natural mineral powder, a natural fiber and polyvinyl alcohol, a mixture plasticizer which comprises alkyl sulfonate and glycol, a coupling agent which comprises macromolecular wax, calcium stearate and a stearic acid lubricant additive, and a polyethylene / polypropylene macromolecular synthetic material. The plastic is manufactured through the following steps: mixing and stirring above blended components; melting, extruding and granulating; and processing into products or films with various shapes through known methods such as blow molding, calendaring, vacuum molding and the like. The residual sludge after water processing can be effectively recycled, so the plastic has the advantages of safety and non-toxicity, thorough degradation in the soil moisture environment, controllable degradation time, no secondary pollution, high intensity, good plasticity and wide application scope.

The invention relates to a composite damping layer toughened thin layer and a preparation method thereof. The invention discloses a preparation method for a novel interlayer toughened layer with a damping vibration attenuation function and an application technology of the interlayer toughened layer in continuous carbon fiber reinforced laminated composite materials. A low surface density non-woven fabric with a network structure, a porous film or textile is adopted as the functional carrier to load polyvinylidene fluoride PVDF, then the composite toughened thin layer is placed at the interlayer of a conventional carbon fiber laminated composite material by an intercalation technology to conduct moulding solidification, thus obtaining the structural damping composite material with the toughness enhanced by more than 3 times. The method is easy to operate, and the obtained composite material not only has significantly improved toughness, no obvious loss of static mechanical properties, obviously increased vibration attenuation rate, but also causes little composite material weight gain.

The invention relates to a sheet laser welding clamping system. The sheet laser welding clamping system is characterized by comprising a laser processing head, a clamp cavity base and a vacuum absorption system, the vacuum absorption system is connected with the clamp cavity base through a pipeline, an end cover is further arranged on the clamp cavity base, the clamp cavity base is made of high-strength steel materials, a cavity structure is arranged inside the clamp cavity base, a through hole is formed in the side wall of the clamp cavity base, and the through hole is connected with the vacuum absorption device through the pipeline. The sheet laser welding clamping system has the advantages that the whole structure is simple, operation is convenient, and the cost is low; the clamp cavity base is of a cavity structure, and is connected with the upper end cover in a welding mode, the sealing effect is achieved, and the assembling structure is simple; due to the fact that the vacuum absorption system is adopted in the sheet laser welding clamping system, the degree of intelligence is greatly improved, starting and shutdown of a vacuum generator are controlled through a vacuum switch, manual operation is easy, a large number of workloads for clamping are reduced, and working efficiency is improved.

The invention discloses a novel wooden structural material with stable durability and a preparation method of the novel wooden structural material and belongs to the technical field of wood protectionand modification. The novel wooden structural material with the stable durability comprises a protective outer shell formed through surface layer heat modification and a core layer. The core layer isa supporting skeleton with a temperature stagnant zone formed through process controlling in the preparing process. The preparation method of the novel wooden structural material with the stable durability comprises the steps that firstly, a wood is sawed and planed, then, the wood is dried, the moisture content of the wood is controlled, by means of a process method, a moisture gradient is formed between the wood surface layer and the core layer, a plate type hot press is used for carrying out heating treatment on the wood surface, the temperature of the core layer is controlled in the heating process, and finally, wet-conditioning treatment is carried out on the wood. The novel wooden structural material with the stable durability and the preparation method of the novel wooden structural material have the main beneficial effects that by means of scientific control over the initial moisture content level and the internal moisture content gradient of the wood and by adjusting the temperature rising rate of the wood surface layer and the core layer, the temperature stagnation area not formed through a conventional process is formed on the core layer, and the mechanical strength ofthe novel wooden structural material is not affected while the size stability of the wood is improved.

The invention discloses a cylinder liner and a preparation process thereof. On the outer ring surface of the cylinder liner, there are randomly distributed recesses and protruding ribs dividing adjacent recesses, and the protruding ribs enclose a recess portion. The recess portion comprises meshes, the outer ring surface of the cylinder liner has closed meshes with the number of at least 10% of the total number of the meshes, and the remaining meshes are intermittent meshes. Through the special structure of the outer ring surface of the cylinder liner, it can be ensured that the aluminum alloyliquid can easily fill the surface during the casting process of the aluminum alloy liquid. After testing, the combination rate of the cylinder liner provided by the invention and the aluminum alloyliquid reaches 90% or more, and the combination rate of the outer round burr-shaped cylinder liner and the aluminum alloy liquid is less than 50%.