Other tool materials

Other tool materials: steel bonded hard alloy: steel bonded hard alloy: Steel cemented carbide referred to as steel bonded gold, is a new type of steel cemented carbide referred to as steel bonded gold, mold material, it takes tungsten carbide or titanium carbide as hard phase, mold material, it takes tungsten carbide or titanium carbide as hard phase, to steel as bonding phase (its volume fraction is generally above 50), 50%), For the bonding phase (its volume fraction is generally more than 50%), for different use requirements, can choose different kinds of steel as the matrix, different use requirements, can choose different kinds of steel as the matrix, including chrome-molybdenum tool steel, high-speed steel, stainless steel and high manganese steel. Including chrome-molybdenum tool steel, high speed steel, stainless steel and high manganese steel. The hardness of steel-bonded cemented carbide not only has the high hardness like hard alloy, high strength cemented carbide hardness has the high hardness like hard alloy, high wear resistance, but also has the machining, degree, high wear resistance of tool steel, and has the machining, hot treatment, forging and welding characteristics of tool steel, processing, forging and welding characteristics, etc. It is a tool material between hard alloy and tool steel. The tool material between hard steel is suitable for the occasions where the tool steel is not enough to wear, and the hard alloy is limited by the toughness and difficult to process and form. Restricted situations.

Ceramics: Ceramics: compared with hard alloy, ceramic materials have higher hardness, higher hardness, red hardness and wear resistance compared with hard alloy. Therefore, when processing steel, grinding. Therefore, when processing steel, the durability of ceramic tool is 10 ~ 20 times the hardness of carbide tool than carbide 2 high and chemical stability, 10 ~ 20 times, its hardness than carbide 2 ~ 6 times, and chemical stability, oxidation resistance are better than carbide. The disadvantages of ceramic materials are greater brittleness, oxidation resistance and so on. The shortcomings of ceramic materials are large brittleness, low transverse fracture strength, poor ability to withstand impact load, low to fracture strength, poor ability to withstand impact load, which is also the focus of continuous improvement in recent decades. The focus of continuous improvement.

Ceramic tool materials can be divided into three categories: ① alumina based ceramics. Commonly used in ceramic tool materials can be divided into three main categories: alumina based ceramics. TiC, WC, ZiC, TaC, ZrO2 and other components are added to the Al2O3 matrix material TiC and TiC, WC, ZiC, TaC, ZrO2 and other components are added to the Al2O3 matrix material. After heat pressing into composite ceramic tool, its hardness can reach 93 95HRC, in order to improve toughness, 93 ~ pressed into composite ceramic tool, its hardness can reach 93 ~ 95HRC, in order to improve toughness, often add a small amount of Co Ni and other metals Co, such as metal. Silicon nitride based ceramics. Add a small amount of Co, Ni and other metals. ② silicon nitride based ceramics. The commonly used Si3N4+TiC+Co ceramic ceramics is Si3N4+TiC+Co composite ceramics, its toughness is higher than alumina based ceramics, Si3N4+TiC+Co composite ceramics, its toughness is higher than alumina based ceramics, hardness is the same. Silicon nitride - alumina composite ceramics. It's equivalent to that. ③ Silicon alumina nitride composite ceramics. Also known as Sialon (Sialon) ceramics its chemical composition is 77%Si3N4+13%Al2O3 ceramics, 77%Si3N4+13%Al2O3, (Sialon) ceramics, its chemical composition is 7%Si3N4+13%Al2O3, hardness up to 1800HV, Bending strength up to 1.20GPa Z suitable for cutting superalloy and cast iron. 1.20GPa, 1800HV, bending strength up to 1.20GPa, most suitable for cutting superalloy and cast iron.