SECO刀具CBN 产品.pptVIP

New developments in successful machining of grey cast iron在成功加工灰铸铁领域的新发展 Correct Cutting Speed 正确的切削速度 Material’s ferrite content 材料中的铁素体含量 材料铁素体含量 – 举例 Correct sulphur levels 适当的硫含量 Aging process Machining grey cast iron with PCBN offers major advantages over other machining methods 与其他加工方式相比加工灰铸铁使用PCBN刀具的优势 * * Note the high wear on the CBN300. This is a common form of failure and is caused by the use of the wrong parameters. Insufficient heat is generated at finishing parameters to compensate for the high thermal conductivity of CBN300, consequently the wear is all abrasive. CBN100 has a much lower conductivity and traps the heat in the shear zone enabling self-induced hot cutting to take place. The result is far lower wear on the CBN100. * * Showing the equilibrium lines for diamond-graphite (Berman-Simon) line and cBN/HBN. Equilibrium lines indicate the regions of stability of different phases in a chemical process. Synthesis temperatures and pressures are slightly lower for cBN/PCBN but both diamond and cBN are normally synthesised at around 1500 oC, 50-60 k bar (1 million pounds per square inch) using the same high pressure equipment. * * Showing the equilibrium lines for diamond-graphite (Berman-Simon) line and cBN/HBN. Equilibrium lines indicate the regions of stability of different phases in a chemical process. Synthesis temperatures and pressures are slightly lower for cBN/PCBN but both diamond and cBN are normally synthesised at around 1500 oC, 50-60 k bar (1 million pounds per square inch) using the same high pressure equipment. * * PCBN Production route from cBN powder to application. HPHT = High pressure high temperature synthesis cBN powder produced from hexagonal boron nitride (hBN) conversion to cubic boron nitride (cBN) powder using HPHT Manufacturing of Secomax cutting tool materials is a precise and complex procedure requiring a high degree of control at all stages. The process begins by taking soft friable hexagonal boron nitride po