How to choose the right diamond tool materials

Core Tip: diamond material tool is widely used in manufacturing. Describes the last decade of the rapidly developing diamond cutting tool material properties,

varieties, Bing materials for different types of diamond tool performance advantages and disadvantages, making a choice Diamond blade .

Recommendations.
Diamond is an allotrope of carbon, is the hardest substance known, its hardness up to 10,000 HV, is also currently the highest hardness of the tool material. In a

suitable processing conditions, compared to high-speed steel diamond tools, carbide, ceramics and polycrystalline Li

Fang boron nitride cutting tools last longer. With its processing of copper, aluminum and other non-ferrous metals and non-metallic materials resistant carbide cutting

speeds than an order of magnitude (such as milling aluminum cutting speed 3000 ~ 4000m/min, even up to high

7500m/min), life is a carbide cutting tools dozens or even hundreds of times. Diamond tools in the past mainly for finishing the last decade through improved

production processes, controlling the grain size and purity of raw materials, the use of composite materials and hot-pressing process, with its crisp there

Significant improvements, toughness, reliability improved significantly as a routine tool can already applied in production, to improve efficiency and ensure product

quality plays an important role.
High hardness and wear resistance of diamond cutting edges are very sharp blade roughness value is small, low friction coefficient, good anti-adhesion, high thermal

conductivity, easy to stick knives and cutting BUE, machined surface good quality. In the processing of non-ferrous metals, the surface roughness

Up to R0.10? 0.05μ m, precision up to IT5 (hole IT6) level and above, can effectively processing of non-ferrous metal materials and non-metallic materials, such as

copper, aluminum and other nonferrous metals and alloys, ceramics, unsintered carbide, a variety of fiber and particle reinforced composites

Materials, plastics, rubber, graphite, glass and various wear-resistant timber (especially solid wood and plywood, MDF and other composite materials).
Diamond drawback is poor toughness, thermal stability is low, and the iron group element in contact with a chemical reaction (4C +3 Fe → Fe3C4), at 700 ~ 800 ℃ when

carbonized (i.e., graphite), is generally not suitable for production of steel materials . Use it when cutting nickel-based alloys, the same will quickly

Wear. It is not generally recommended diamond tool machining refractory metals and alloys. In addition, diamond tool sharpening difficult and expensive. Table 1 lists

the diamond tool and cemented carbide tool performance comparison between the two.
Diamond tool materials species classification
Diamond tool material is divided into single-crystal diamond (there are two kinds of natural and man-made, natural single crystal diamond expensive part is single

crystal synthetic diamond substitute), synthetic polycrystalline diamond (PCD) and synthetic polycrystalline diamond and carbide composite blade (PCD / CC) and

CVD diamond.
How to choose the diamond tool materials.
Currently, single crystal diamond, PCD (or PCD / CC), and were successfully used for CVD diamond turning, boring tools, drills, reamers, milling cutters, molding

knives and other cutting tools Cutting part of the production materials. Variety of diamond material to be processed according to the nature of the material

And processing requirements to select, in addition to meet the technical requirements, but also to meet the economic and environmental performance requirements.