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一 COMPAX金刚石坯件1974年,在加拿大金刚石钻探协会第31届年会上,美国提出了一篇论文,内容是介绍用一种称为COMPAX的金刚石钻头坯件在赤铁矿层进行岩心钻探的初步试验工作.所谓COMPAX金刚石坯件,是用聚晶金刚石粘结层焊接到碳化钨硬质合金衬层上组成的圆形块,直径为8.2毫米,金刚石粘结层厚约0.5毫米,碳化钨硬质合金衬层厚2.8毫米.用这种坯件嵌镶在钻头体上制成地质钻头.钻头体是用AISl3120号钢(即20CrNi钢)制造的,在其唇面上铣出一定深度和宽度的径向槽,用45号易熔焊料和Handi焊剂将金刚石坯件镶焊到槽中.镶焊是在620℃熔点下进行的,具有足够大的焊接强
A COMPAX diamond blank In 1974, at the 31st annual meeting of the Canadian Diamond Drilling Association, the United States presented a paper on core drilling of a hematite deposit using a diamond bit blank called COMPAX Preliminary test work. The so-called COMPAX diamond blank is a polycrystalline diamond bonding layer welded to the tungsten carbide lining composed of round blocks, a diameter of 8.2 mm, the thickness of the diamond bonding layer is about 0.5 mm, tungsten carbide The cemented carbide lining is 2.8 mm thick and is embedded in the bit body with this blank to make a geological bit, which is made of AISl 3120 steel (20CrNi steel), milled to a certain depth on its face and Width of the radial groove, the use of Fort No. 45 fusible solder and Handi flux inlaid diamond blank into the groove inset welding is carried out at a melting point of 620 ℃, with a sufficiently large welding strength