| 1. | The multi - formation of chips often collects into groups and felts on the surface of concrete sawing area or segment , which will make the sawblade easy to be loaded under the extrusion of cement chips and diamond grits
在粘性水泥粉屑以及金刚石磨粒的挤压作用下，多种形态的切屑易粘结成团，并粘附到混凝土锯切表面和锯片节块上而导致锯片堵塞。 |
| 2. | However , due to the low adhesive strength between diamond particles and metal matrix , diamond grits are prematurely pulled out during cutting , which leads to an increase of tool cost and a decrease of machining efficiency
然而，由于大多数金属胎体不能实现对金刚石磨粒的有效粘结，造成锯片使用过程中金刚石磨粒的过早脱落，导致金刚石锯片成本增加、加工效率降低。 |
| 3. | Sawing is carried out by diamond grits which are embedded into a metal matrix , so whether diamond grits can be tightly held in the metal matrix , and whether their cutting abilities can be fulfilled directly determine the sawing performance and the life of the diamond saw - blade
由于金刚石圆锯片的锯切是通过固结在金属胎体中的金刚石磨粒来实现，因此，金属胎体能否有效地把持金刚石磨粒，使其充分发挥切削作用，将直接决定锯片的切削性能和使用寿命。 |
| 4. | 3 . the diamond segment wear process was analyzed by testing the weight of segment before and after sawing . the patterns of wear and breakage of diamond grits and bond wear mechanism of the blade were analyzed based on the observation on the working surface of the saw blade by stereo microscope and scanning electronic microscope
采用称重法测量锯切过程锯片节块磨损量，并通过计算磨削比，分析了混凝土锯切过程金刚石节块的磨损特性及其影响因素，并采用sem和体视显微镜观察节块不同部位工作表面和金刚石的磨损破坏情况，研究了金刚石磨损破坏的主要形式和胎体材料的磨损形态。 |
| 5. | The results show that the process of concrete sawing with diamond tools is that the impact of diamond sawblade induces the rupture and break of concrete surface layer during high speed sawing ; cement and carpolite become micro chips by the cutting of diamond grits ; steel fiber and steel wire are broken by plastic deformation or pulled out by forces
结果表明：金刚石锯片锯切混凝土的过程表现为高速据切过程中金刚石据片的冲击引起混凝土表层断裂破碎，水泥石子等在切削区内层受到金刚石磨粒的微切削作用形成粉屑，以及钢纤维和钢丝发生金属塑性变形断裂或被拔拉而断裂的过程。 |
| 6. | Saw - blades made of iron - based matrix with different additives were fabricated to carry out the sawing of granite . the consumed spindle power , cutting forces and the wear resistance of the saw - blades were measured . sem observations on the worn surfaces of saw - blade segments were also carried out to reveal the wear characteristics of diamond grits and the metal matrix as well as the bonding at the diamond - matrix interface
制造含不同添加剂的铁基金刚石锯片，进行花岗石锯切实验，测定锯切功率、锯切力和锯片的耐磨度，并用扫描电镜观察节块工作面上金刚石磨粒和金属胎体的磨损形貌及金属胎体和金刚石界面结合状况，综合评价不同添加剂对锯切性能的改性效果。 |
| 7. | In addition , under high sintering temperatures , iron powder can result in the graphitization of diamonds . these two reasons will affect the mechanical properties of the metal bond and its retention capacity . as a result , the wear resistance of metal bond is poor and diamond grits can be easily pulled out from the matrix , thereby shortening the life of the saw - blade
而且在高温下，铁粉会对金刚石产生较严重的化学侵蚀，这两方面的原因都会影响结合剂本身的力学性能及其对金刚石的有效把持，导致锯切过程中结合剂耐磨性差，金刚石容易脱落，使锯片寿命缩短。 |
