金属结合剂金刚石磨具具有强度高、耐磨性好、组织致密和使用寿命长等优点，

Metal bond diamond abrasives have the advantages of high strength, good wear resistance, dense organization and long service life. They are widely used in the grinding process of hard materials such as cemented carbide, stone, ceramics, and glass [1-2] . However, the shortcomings of the traditional metal bond diamond grinding wheel prepared by hot pressing sintering method are also very obvious, such as high density of the grinding wheel, poor self-sharpness, difficult discharge of abrasive debris, easy clogging, difficult shaping and shaping, etc. Grinding efficiency becomes lower. This paper attempts to introduce the pore structure of the traditional ceramic bond into the metal bond diamond abrasive tool to prepare the porous metal bond diamond abrasive tool, which makes the self-sharpness more excellent and can improve the grinding caused by grinding to a certain extent. Force, effectively reduce grinding heat and grinding temperature. <br>This paper intends to prepare copper-nickel-tin based diamond grinding wheels by ordinary hot pressing sintering method. By studying the pore-forming effect when two pore-forming agents are used in combination, the experiment finally selects the more appropriate doping ratio and sintering process of the two pore-forming agents, and attempts to manufacture a metal-bonded diamond grinding wheel with a higher porosity. Effectively improve the self-sharpening of the grinding wheel, increase the proportion of pores inside the grinding wheel, expand the chip-containing and chip-removing space of the diamond grinding wheel, and thus improve the performance of the metal-bonded diamond grinding wheel. By individually changing the doping ratio and addition amount of the two pore-forming agents (sodium bicarbonate, ceramic hollow spheres) in the metal binder, arrange the test to prepare several groups of single-variable metal binder test strips. Correspondence between the amount of pore-forming agent added and the type of pore-forming agent, as well as the potential relationship between the flexural and flexural strength, the amount of pore-forming agent added, and the doping ratio of ceramic hollow spheres; The relationship between the doping ratio of the pore agent and the amount of addition; the effect of the shape and distribution of the pore structure on the impact resistance of the binder spline at the same or similar porosity; at the same time, the type and amount of pore-forming agent on the metal binder are studied The influence of a series of properties such as hardness and strength of the test strip.

Metal binder diamond abrasives have the advantages of high strength, good wear resistance, tight organization and long service life, and are widely used in the grinding process of hard-to-process materials such as carbide, stone, ceramics, glass. However, the shortcomings of the traditional metal binder diamond grinding wheel prepared by the hot-pressing sintering method are also very obvious, such as high degree of grinding wheel density, poor self-sharpness, difficult to discharge, easy to clog, repair shaping is more difficult, which will lead to the grinding efficiency of the grinding wheel is lower. In this paper, we try to introduce the pore structure of traditional ceramic binding agent into the metal binder diamond abrasive, and prepare the multiporous metal binder diamond abrasive, so that its self-sharpness is better, can improve the grinding force produced by grinding to a certain extent, and effectively reduce the grinding heat and grinding temperature.<br>In this paper, it is proposed to use the ordinary hot sintering method to prepare copper-nickel-tin-based diamond grinding wheel. By studying the hole-making effect of the mixing of two perforators, and by testing the doping ratio and sintering process of the two more suitable perforators, the diamond grinding wheel, which has a higher porosity, is tried to effectively improve the self-sharpness of the grinding wheel, and increases the proportion of pores inside the grinding wheel, and the chip drain space of the diamond grinding wheel is expanded, thereby improving the performance of the metal binding agent diamond grinding wheel. By individually changing the doping ratio and addition of two kinds of metal binding agent (sodium bicarbonate, ceramic hollow ball), arrange the test preparation to obtain a single variable of the metal binding agent test strip several groups, the study results in the porosity rate and the addition of pore agent The correspondence between the types of perforator, and the potential relationship between the anti-bending strength and the perforator addition, the doping ratio of ceramic hollow balls, and the relationship between the pore pattern and the doping ratio and the addition of the pore-making agent The shape and distribution of the same or similar pore structure affectthesr of the anti-impact ability of the binding agent sample, and the effect of the type of perforator and the amount of addition on the hardness and strength of the metal binder test strip is studied.

Metal bonded diamond grinding tools have the advantages of high strength, good wear resistance, compact structure and long service life, which are widely used in the grinding process of hard to process materials such as hard alloy, stone, ceramics, glass and so on [1-2]. However, the disadvantages of the traditional metal bonded diamond wheel made by hot pressing sintering method are also very obvious, such as the high density of the wheel, the poor self sharpening, the difficult to discharge the debris, the easy to block, the more difficult to repair and reshape, etc., which will lead to the grinding efficiency of the wheel become low. In this paper, we try to introduce the pore structure of traditional ceramic bond into the metal bond diamond grinding tool to prepare porous metal bond diamond grinding tool, so that its self sharpness is better, the grinding force produced by grinding can be improved to a certain extent, and the grinding heat and grinding temperature can be effectively reduced.<br>In this paper, the common hot pressing sintering method is used to prepare Cu Ni Sn based diamond grinding wheel. Through the study of the pore forming effect of two kinds of pore forming agents when they are used together, the appropriate doping proportion and sintering process of the two kinds of pore forming agents are finally selected through the test, and the metal bonded diamond wheel with high porosity is tried to be manufactured, which can effectively improve the self sharpening of the wheel, increase the proportion of pores in the wheel, expand the space of chip holding and chip discharging of the diamond wheel, so as to improve the gold content The utility model belongs to the use performance of bond diamond grinding wheel. By changing the doping ratio and addition amount of two kinds of pore formers (sodium bicarbonate and ceramic hollow ball) in the metal bond separately, several groups of metal bond test strips with single variable were prepared by arranging the experiment, and the corresponding relationship between porosity, the addition amount of pore formers and the type of pore formers, as well as the relationship between bending strength, the addition amount of pore formers and the doping of ceramic hollow ball were studied The potential relationship between the ratio, the relationship between the pore shape of the grinding wheel and the doping ratio and the addition amount of the pore forming agent, the influence of the pore structure shape and the distribution on the impact resistance of the bond spline with the same or similar porosity, and the influence of the type and the addition amount of the pore forming agent on the hardness and strength of the metal bond specimen are also studied.<br>