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RT，如个别词汇属于专业范畴，不好翻译的话请留言，我会提供的，谢谢啦，最近实在太忙了。 金刚石树脂基砂轮是以金刚石为磨料，以树脂为结合剂，加入适当的填充材料，通过配制、混合、热压成型、固化、机械加工等工艺过程制成的具有一定刚性的磨削工具。其具有制造工艺简单，成本低，砂轮易修整等优点，而且树脂基磨具具有一定的弹性，有利于改善工件表面的粗糙度，被广泛应用于陶瓷、玻璃、硬质合金等硬脆材料的磨削加工中。但由于金刚石的化学稳定性极好，在常温下，金刚石对酸、碱、盐等化学试剂都表现为惰性。因此，树脂与金刚石颗粒之间的结合性能不理想。目前常用的处理方法如镀铜、镀镍等虽然能改善树脂与金刚石颗粒之间的浸润性，但多是机械嵌合，难以形成化学键的结合，还会影响金刚石磨粒的自锐性；而且关于偶联剂处理金刚石磨料的文献所见较少，文献中所采用的处理方法均为单独使用偶联剂处理，未对金刚石进行预处理，处理工艺杂乱，改性效果不稳定，对砂轮的性能提升不明显。 本文中采用NaOH溶液对金刚石磨料进行了预处理，然后用硅烷偶联剂进行表面改性，通过FTIR，润湿性，冲击强度，磨削性能等对处理效果进行表征，发现经过处理后，金刚石表面的化学成分发生改变，羟基吸收峰的强度减小；金刚石的润湿性也发生了变化，由亲水变为疏水，最明显的是为了减小与水的接触面积，经过处理的金刚石在水面上由分散状态变为聚拢状态；通过对树脂样条冲击强度和洛氏硬度的测试发现，处理后的金刚石对树脂基体的冲击强度有增强作用，但洛氏硬度无明显变化。 |
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alsjiao
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Diamond resin grinding wheel is a diamond abrasive to resin binder filled with suitable material, through the preparation, mixing, hot pressing, curing, machining and other process made of a certain rigidity of the grinding tool. Qi with the manufacturing process is simple, low cost, wheel easy to repair, etc., and resin-based abrasive has a certain flexibility, improves the surface roughness, is widely used in ceramics, glass, carbide and other hard and brittle materials grinding. However, due to excellent chemical stability of diamond at room temperature, the diamond of acid, alkali, salt and other chemicals have shown to be inert. Therefore, the resin and binding properties between the diamond particles are not ideal. The commonly used treatments such as copper, nickel, etc. Although the resin can improve the wettability between diamond grains, but mostly mechanical chimera, a combination difficult to form chemical bonds, but will also affect the self-sharpening diamond grits; and coupling agents on the literature of diamond abrasive saw less literature approach used coupling agents are used alone, without pretreatment of the diamond, treatment process messy, unstable modification effect on the grinding wheel performance is not obvious. NaOH solution used in this article were pretreated diamond abrasive, and surface modification with silane coupling agent, by FTIR, wettability, impact strength, such as grinding performance was characterized on the treatment effect was found after treatment, the diamond surface the chemical composition changes, reducing the intensity of hydroxyl absorption peak; diamond wetting is also changed from hydrophilic into hydrophobic, the most obvious is to reduce the contact area with water, treated diamonds on the water gather in the dispersed state to state; spline through the impact on resin strength and Rockwell hardness tests showed that after the diamond on the impact strength of the resin matrix can enhance the effect, but no significant change in Rockwell hardness. |
2楼2010-10-24 18:46:39