变质岩类石材的专业切割/雕刻金刚石锯片的设计开发

A Design of the Special Diamond Saw Blade for Cutting/Carving Metamorphic Stone

文章介绍了在钟罩炉中烧结制备变质岩类石材雕刻金刚石锯片的工艺特点及开发过程,分别设计考察了铜基及铁基两类胎体锯片,并对锯片从胎体设计、金刚石选配及制备工艺等方面进行优化组合。通过对原材料粉末进行细化改性处理,调控了粉末粒度、形貌、添加剂种类及组分配比,优化了胎体的组织结构与机械性能。在优化选取可满足设计需求的基本胎体后,再通过加入细颗粒的氧化铝来进一步调整胎体的脆性。在固定胎体的冶金及工艺条件后,还对金刚石进行强度、粒度、浓度的选配,以调整胎体与金刚石间的磨损适配能力,并采用镀覆金刚石来提高金刚石的有效利用率。经系列化的优化试验,开发生产出了可对变质岩类石材进行持续干切加工的雕刻锯片。

The development and processing features of a sintering diamond saw blades, which were applied in carving metamorphic stone, in a elevator furnace was introduced in the paper.Two kinds of matrix of copper-base and iron-base were studied and designed through optimizing the matrix formula, diamonds matching,and process parameters. The optimized matrix microstructures and mechanical properties were obtained by adding fined metal powders,especially by controlling the grain size and morphology of the powders, and the contents and proportion of additives. The fined alumina powder was added to adjust the brittleness and wear resistance of the as-optimized matrix.With the stable metallurgy and process conditions, the diamond collections of different strengths, sizes and concentrations were also applied to adjust the wear compatibility between the matrix and diamond. Further more, titanium-coated diamond was chosen to enhance the effective utilization. Through the series of optimization tests,a kind of carving saw blade was successfully developed which can cut the metamorphic rocks continuously without water.