New special ceramic tool research trends (3)
1 pure silicon nitride ceramic cutter, its hardness HRA91～92, bending strength 700～900Mpa, fracture toughness 4.2～5.2MpaVm, heat resistance up to 1300～1400°C, its thermal expansion coefficient is 3.0×10-6/°C, Has good antioxidant properties. 2 silicon nitride composite ceramic cutter; it is a ceramic tool made by adding a composition of Al2O3, Y2O3, TiC, TiN and MgO to a silicon nitride matrix, and using a composite strengthening effect and cold pressing sintering, the performance of which is superior to that of hot pressing. Pure silicon nitride ceramic tool. For example, the addition of Al2O3 sintered ceramic tools to silicon nitride, combined with the characteristics of Al2O3 and SiN4, is higher than that of hard alloy tools and alumina ceramic tools, and the cutting edge temperature is higher than 1000 °C. Its biggest advantage is to increase the cutting speed, increase the feed rate, increase the metal removal rate and extend the tool life. Silicon nitride ceramic tools are particularly suitable for cutting various cast irons and superalloys, but they cannot process steels that produce long chips. Previous page
Key benefits of high PPE plant lights include:
1. Provide high-quality light: High PPE values ensure that plants can make full use of light energy, promote photosynthesis and growth and development.
2. Energy saving and environmental protection: LED technology has the characteristics of high efficiency and low energy consumption, which can save energy compared with traditional plant lamps.
3. Long life: LED lamps have a long life and can be used for thousands of hours, reducing the frequency and cost of replacing lamps.
4. Adjustable spectrum: High PPE plant lights can adjust the color and intensity of light to adapt to the needs of different plants at different growth stages.
5. Easy to install and use: High PPE plant lights usually adopt plug type design, easy to install, and can be flexibly used in indoor planting environment.
led grow lights with high photosynthetic photon flux density have the following effects on crops:
Promote photosynthesis: indoor growth led lights with high photosynthetic photon flux density can provide sufficient light energy to promote photosynthesis of crops. Photosynthesis is the basis for plant growth and development and is capable of synthesizing organic matter and producing energy. Therefore, high-light intensity led lights grow can increase the photosynthetic efficiency of crops and promote their growth.
Increase growth rate: ir growth led lights with high photosynthetic photon flux density can provide enough light energy to enable crops to carry out adequate photosynthesis, thereby increasing their growth rate. Photosynthesis is a key process for plant growth, and led grow lights with high photosynthetic photon flux density can provide enough light energy to enable crops to photosynthesize faster and promote growth.
Improve yield and quality: grow led light with high photosynthetic photon flux density can provide enough light energy to enable crops to carry out full photosynthesis. Photosynthesis is the process by which plants synthesize organic matter, and growth led light with high photosynthetic photon flux density can provide enough light energy to enable crops to synthesize more organic matter, thereby increasing yields. At the same time, growth led lights with high photosynthetic photon flux density can also provide a suitable spectrum and photoperiod, which also has a positive impact on the quality of crops.
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In short, with the deepening of the research and development of special ceramic materials in the world, the proportion of ceramic tools in the metal cutting and processing industry has been expanding. In recent years, due to the development requirements of the world aviation and aerospace industries, it is necessary to meet the requirements for improving the cutting efficiency of workpiece materials such as Ti alloys and Ni-based superalloys, so that new special ceramic tool materials will make greater contributions.