1 superhard material: diamond and cubic boron nitride and diamond and cubic boron nitride as the main component of polycrystalline composite sheet.
2 diamond why not suitable for processing iron-based metal material:
Because diamond can occur chemistry at high temperatures and Fe metal grinding material, diamond carbon and these elements play a role in generating carbides, resulting in sticky knife show and shorten life, processing quality decline, therefore, not suitable for processing diamonds steel, including ordinary steel and various steel toughness. Such materials are generally used cBN tooling.
3 superhard materials in the future major development direction:
Single Crystal Synthesis
(Using different materials, high-temperature high-pressure synthesis of different devices and different techniques, different synthetic single crystal products)
Monocrystalline sorting
(Synthesis of single crystal products, carried out in accordance with different particle shape, particle size, bulk density, impurity content and strength, toughness, heat resistance, and other performance indicators sorting, so that the single crystal is divided into different species)
Surface plating
(After sorting different varieties of a single crystal, the use of chemical plating, electroplating, vacuum plating and other surface plating)
Polycrystalline Manufacturing
(The use of a single crystal diamond or graphite powder and a suitable metal powder and nonmetal powder materials, according to the appropriate formula, using the corresponding process method (high-temperature high-pressure sintering method or direct growth method), manufactured with different shapes, size, performance and polycrystalline purposes)
Thin film growth
(Using low pressure conditions at various vapor deposition growth method for producing a diamond film or a diamond film with special properties and larger size)
Usefulness of superhard materials
(1) Abrasives
Diamond abrasive is mainly used for grinding the following materials, polishing or cutting: carbide, ceramics and refractories, glass, graphite, precious stones, non-ferrous materials and non-metallic materials.
CBN abrasive primarily used for various high-speed steel, bearing steel, cast iron, stainless steel, wear-resistant coating, high-temperature alloys and other hard grind materials grinding and polishing.
(2) tools (including thin film coated tools).
Diamond tools mainly used for various non-metallic materials and non-ferrous materials, turning, milling, boring, drilling and other processes, such as glass, steel, hard plastics, rubber, building materials, carbon fibers, ceramics, refractories, copper, aluminum and composite materials alloys.
CBN tool is mainly used for machining hardened steel, chilled cast iron, stainless steel, high temperature alloys, wear-resistant coating and other materials.
(3) drill.
For geology, petroleum, coal, construction and other exploration and mining.
(4) cutting tools.
Mainly used for cutting stone, building materials, ceramics, refractories, carbon products, semiconductors, precious stones, wood, etc.; also used for road, airport runway, grooving and cutting of building elements.
(5) drawing tool.
The following metal materials for drawing wire and wire rod, tungsten, molybdenum, copper, aluminum, stainless steel, galvanized steel, steel and alloys.
(6) The dressing tool.
Molding trim for ordinary abrasive, plastic, dressing, etc.
(7) other tools.
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