ABRASIVE ARTICLE FOR HIGH-SPEED GRINDING OPERATIONS

• Main Authors: RENAUD FIX, JOHN CAMPANIELLO, NILANJAN SARANGI, JIM GAFFNEY, STEPHEN E FOX, STEPHEN WOODS, JOHN R BESSE
• Format: Patent
• Language: English; Japanese
• Published: 17.12.2015
• Subjects: GRINDING; PERFORMING OPERATIONS; POLISHING; TOOLS FOR GRINDING, BUFFING, OR SHARPENING; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a bonded abrasive article suitable for high-speed grinding operations.SOLUTION: A bonded abrasive article includes a bonded abrasive body having abrasive particles comprising microcrystalline alumina (MCA) contained within a bond material, and the bonded abrasive body comprises a strength ratio (MOR/MOE) of at least about 0.80. In another aspect, the bonded abrasive body comprises a MOR (modulus of rupture) of at least 40 MPa for a MOE (modulus of elasticity) of 40 GPa. The bond material is formed of inorganic compounds, such as oxide compounds. For example, suitable oxide compounds include silicon oxides, boron oxides, phosphorus oxides, alkaline oxide compounds, alkaline earth oxides, and the like. Thus a stiff bonded abrasive body can be achieved for a given modulus of elasticity (MOE), which is capable of grinding a workpiece comprising metal at a high speed (60 m/second). 【課題】高速研削操作を行うために好適な結合研磨物品を提供する。【解決手段】結合研磨物品は、微結晶性アルミナ（ＭＣＡ）を含む研磨粒子が結合材内に含有される結合研磨体を含み、結合研磨体が、少なくとも約０．８０の強度比（ＭＯＲ／ＭＯＥ）を含む。また別態様として、４０ＧＰａのＭＯＥ（弾性率）に対して少なくとも４０ＭＰａのＭＯＲ（破壊係数）を含む。結合材は、酸化物化合物などの無機化合物で形成する。例えば、酸化ケイ素、酸化ホウ素、酸化リンや、アルカリ酸化物化合物、アルカリ土類酸化物などである。これにより堅い結合研磨体が所与の弾性率に対して達成でき、金属等の工作物を高速で（６０ｍ／秒）で研削することができる。【選択図】図２