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磨料Grinding Material
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用途Appellation
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棕刚玉（A）Brown aluminum oxide
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磨削抗张强度较高的金属，如铬钢、高速钢、碳钢等For grinding
metals of the higher tensile strength such as chrome
steel、carbon steel etc.
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白刚玉（WA）White aluminum oxide
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磨削易烧伤或精度要求高的工件，如丝锥、量规等For grinding
workpieces of easy to burn and high precision to be
requested such as tap gauge etc.
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黑碳化硅（C）Black silicon-carbide
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磨削强度低的工件，如灰、白口铸铁、钢件等For grinding metals
of the low tensile strength such as iron casting of
gray and white broken copper workpieces etc.
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绿碳化硅（GC）Green silicon-carbide
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磨削硬质合金、铰刀、石材、玻璃等For grinding the rigid
alloy reamer stone material glass etc.
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2、粒度选择 The selection of grain No.
3、结合剂代号Binder code.
