棕剛玉

棕剛玉是以鋁礬土等為原料，經(jīng)高溫熔煉結(jié)晶而成。它具有硬度高，韌性大，顆粒鋒銳等特點(diǎn)。用其制成的磨具適用于磨削加工抗張強(qiáng)度高的金屬材料。如：碳素鋼，一般合金鋼，可鍛鑄鐵，硬青銅等。也可以作為耐火材料之用。

Brown aluminium oxide

Brown aluminium oxide is fused and crystallized under high temperature from a mixture of bauxite and other and other raw materials. It is characterized by its high hardness,good toughness and shape in size. Abrasives tools made of it are suitable for grinding metals of high-tensile strength such as: carbon steel,general-purpose alloy steel,annealed malleable iron and hard broze,etc.It also can be used as refractory materials.