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通常硬质合金刀片和刀杆采用钎焊的方法加以联接,焊接后刀片易产生热应力裂纹,降低其使用寿命。用胶接法则明显优于焊接,还能以铸铁刀杆代替优质钢材杆,且刀杆可重复使用。为此,我们选择了十几种胶进行了筛选和对比试验,最后决定采用氧化铜-磷酸无机胶。此胶配制、使用方便,原料易购,可耐较高温度,并且在一定条件下有较好的胶接强度。配制时平均每ml磷酸溶液取4.5g氧化铜粉,在铜板上混合均
Carbide blades and arbor are usually brazed using the method to be coupled, the blade is easy to produce thermal stress cracks after welding, reducing its service life. The bonding method is obviously better than the welding, but also to replace the cast iron arbor high-quality steel rod, and the arbor can be reused. To this end, we have chosen a dozen kinds of plastic screening and comparative tests, the final decision to use copper oxide - phosphate inorganic plastic. This plastic preparation, easy to use, easy to buy raw materials, resistant to higher temperatures, and under certain conditions have a good adhesive strength. Preparation of an average of 4.5g per ml of phosphoric acid solution taken copper oxide powder were mixed on the copper plate