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Determination method of composite plate
复合板在较高或较低温度下都会发生相分离，只有当温度在UCST < T < L CST 范围内时，任何复合板成分的共混物都是单相的。
The composite plates will undergo phase separation at higher or lower temperatures. Only when the temperature is within the range of ucst < T < l CST, the blends of any composite plate component are single-phase.
原则上，所有对复合板相结构敏感的方法都可以确定相界，如热分析法和动态力学法； 或者可以直接观察物相结构和形貌的方法，如扫描电镜、透射电镜等。 下面给出使用散射光强度 I 确定相边界的示例。
In principle, all methods sensitive to the phase structure of composite plates can determine the phase boundary, such as thermal analysis and dynamic mechanics; Or we can directly observe the phase structure and morphology, such as scanning electron microscope, transmission electron microscope and so on. An example of determining the phase boundary using the scattered light intensity I is given below.
对于一般的多相共混体系，分散相的尺寸通常在数百纳米到数十微米的范围内。 这个尺寸的下限已经与可见光的波长相当。 因此，当光通过该类材料时，会发生强烈的光散射并出现浑浊，而当为单相时，不会出现散射光强度的突变。 利用光散射的这一特性，可以确定相界线，并给出一个典型的结果。 复合板的散射光强度曲线随温度突然变化的温度，通常称为“浊点”。
For general multiphase blends, the size of dispersed phase usually ranges from hundreds of nanometers to tens of microns. The lower limit of this size is already equivalent to the wavelength of visible light. Therefore, when light passes through such materials, strong light scattering and turbidity will occur, while when it is single-phase, there will be no sudden change in the intensity of scattered light. Using this characteristic of light scattering, the phase boundary can be determined and a typical result is given. The temperature at which the scattered light intensity curve of the composite plate changes suddenly with temperature is usually called "cloud point".
Four key points of composite board classification
The chromium content of the anti-oxidation composite plate is about 13% (mass fraction), which has good anti-oxidation, corrosion resistance, high strength and thermal strength properties. Due to its different carbon content, it has different properties and uses. Low carbon composite plates are used as load-bearing components working below 200 ℃, such as bolts, joints, shaft pins, etc. High carbon content composite plate is used as heat-resistant and wear-resistant eddy current device, valve, shaft, etc.
A large amount of supplementary strengthening elements are added to the outdoor composite plate. After quenching and medium temperature tempering, secondary hardening is generated to further improve the strength and thermal strength. It is widely used as engine compressor blades, discs, journal, ring parts and other important bearing parts working below 300 ℃.
Indoor composite board is a kind of precipitation hardening high-strength board between outdoor composite board and waterproof composite board. This kind of plate is a conventional structure at room temperature, with excellent plasticity and processing formability. After cryogenic and aging treatment, it can achieve high strength, and can also achieve ultra-high strength through cold deformation.
Jinan composite plate factory believes that the reinforced composite plate is widely used as fuel pipe, hydraulic pipe and other pipe lines, radiators and welding components of aircraft and engines because of its high chromium content, oxidation resistance, stable structure at room temperature, non-magnetic, excellent plasticity and processing formability. It can also be used to manufacture elastic components through cold deformation.
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