Sintering
Parts:
There are similarities with the production
of ceramic powder sintering technology, are, therefore, a series of powder
metallurgy new technology can also be used in the preparation of ceramic
materials. Because of the advantages of powder metallurgical technology, it has
become the key problem to solve new materials, plays an important role in the
development of new materials in powder metallurgy products. Including milling
and milling which is mainly metallurgical process, and powder metallurgy
products and literal agreement. It is often far beyond the category of
materials and metallurgy, often across multiple studies (materials and
metallurgy, machinery and Mechanical) technology. Especially the modern
printing metal powder 3D, in Mechanical Engineering Cheng, CAD, reverse
engineering technology, layered manufacturing technology, numerical control
technology, materials science, laser technology, makes the product technology
of powder metallurgy technology has become a modern comprehensive more cross
discipline.
Based on different raw material,we can make
Carbon Steel Sintering and Stainless Steel Sintering parts.
Advantages:
Powder metallurgy has unique chemical
composition and mechanical, physical properties, and these properties can not
be obtained by traditional casting method. Be made directly using porous powder
metallurgy technology, semi dense or fully dense materials and products, such
as oil bearing, gear, cam, a guide rod, a cutter.
(1) The process of powder metallurgy
technology can minimize alloy composition segregation, eliminate thick, uneven
casting organization. In the preparation of high performance rare earth
permanent magnetic materials, rare earth hydrogen storage materials, rare earth
luminescent materials, rare earth catalyst, high temperature superconducting
materials, new metal materials (such as Al-Li alloy, heat-resistant al super
alloy, alloy powder, corrosion resistance of stainless steel, high-speed steel
powder, intermetallic compound high temperature structural materials) plays an
important role.
(2) It can be prepared by amorphous,
microcrystalline, quasicrystals, nanocrystalline and supersaturated solid
solution of a series of high performance etc. The balance of materials, these
materials have excellent electrical, magnetic, optical and mechanical
properties.
(3) It can be easily combined with various
types, give full play to the characteristics of each element of the respective
materials, is a kind of high performance metal based ceramic composite material
and low cost technology.
(4) It can make special structure and
properties of the production that ordinary smelting method can`t produce, such
as a new type of porous biomaterials, porous membrane material, structure and
function of high performance ceramic abrasive material.
(5) It can realize near net forming and
automatic batch production, which can effectively reduce the production of
resources and energy consumption
(6) It can make full use of ore tailings,
steelmaking sludge, mill scale, scrap metal recycling as raw materials, is a
kind of new technology can be effective and comprehensive utilization of
renewable materials.
Manufacturing
process:
(1) The production of powder. It includes
powder preparation, mixing and other steps. For powder molding and plasticity
improve powder usually add oil, rubber or paraffin as plasticizer.
(2) Pressing powder. Under the pressure of
15-600mpa, pressed into the desired shape;
(3) High temperature sintering furnace or
vacuum furnace. In a protective atmosphere in sintering. Unlike metal melting,
sintering at least one element is in solid state. The sintering process of
powder particles by diffusion, recrystallization, welding, chemical, physical
and chemical dissolution process of a series, as metallurgy products have a
certain porosity.
(4) Postprocessing. In general, good
Sintering Parts can be used directly. But for some high precision size
requirements and has high hardness and wear resistance of the parts but also
for sintering postprocessing. Postprocessing including precision pressing,
rolling, extrusion, quenching, quenching, oil, And infiltration, etc.
Sintering Parts Sintering Parts,Carbon Steel Sintering,Stainless Steel Sintering,High Performance Sintering Parts VESTA Motoring Ltd , https://www.vesta-industry.com
Many people have different opinions about the aging of bread, such as water movement theory, starch change theory and so on. Some people think that the interaction between gluten protein and starch has caused each and every reason, and many studies are still going on. However, there is a more unified consensus that aging is caused by starch, and other reasons are secondary. In daily life, the phenomenon of steamed buns becoming hard and dregs is actually the aging phenomenon of steamed buns. Through the analysis of the new national standard powder screening, it is mainly due to the extension of storage time, the water inside the steamed bread migrates, and the recrystallization of starch causes the decrease of soluble substances. To this end, we use the amount of dry matter in the supernatant of the taro taro to determine the aging degree of taro.
The analysis of the new national standard powder screening sieve for the production of steamed bread showed that the higher the specific volume of the steamed bread, the higher the dry matter content of the supernatant. The more soluble substances in the steamed buns, the softer the steamed buns, ie, the greater the ratio. Rong can delay the aging of steamed bread; steamed bread in the storage time (1 to 24 hours), the dry matter content of the supernatant showed a downward trend, that is, the soluble matter of the head rice dumplings is continuously decreasing, and the steamed bread is hardened. The content of dry matter in the supernatant of taro powder with improver is obviously higher than that of the original basal flour, which means that the taro powder improver is still very effective in improving the aging of steamed bread; however, the different additives may have different emphasis on the improvement of steamed bread quality. The active ingredients and the mechanism of action of the manufacturer's additives may also be different. Therefore, when they are actually used, they should be reasonably selected according to their quality requirements and instructions for the use of additives.
The New National Standard Powder Screen Monitors the Quality of Special Flour for Steamed Bread
The improvement of living standards is accompanied by the acceleration of the pace of life. Therefore, the demand for commodity gimmicks is also increasing, and its requirements for its quality are constantly increasing. The biggest factor affecting the quality of steamed bread is the quality of the flour. The main factor is that during the storage process, the precipitation of partially soluble starch causes the steamed bread to soften and harden, the mouthfeel is rough, and it is easy to drop the slag, and the digestion and water absorption rate is low. Therefore, when we analyze the effect of additive improvement, delaying the aging of steamed bread is an important indicator. The new national standard powder screening is very important for the quality inspection of flour. After a new series of inspection equipment such as a new national standard powder screening machine, the flour was analyzed to study the quality of steamed bread.