CN103395009B - Ceramic hollow sphere multi-layer brazed diamond block and manufacturing method thereof - Google Patents
Ceramic hollow sphere multi-layer brazed diamond block and manufacturing method thereof Download PDFInfo
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- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 67
- 239000010432 diamond Substances 0.000 title claims abstract description 67
- 239000000919 ceramic Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000002245 particle Substances 0.000 claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000006061 abrasive grain Substances 0.000 claims abstract description 23
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 23
- 239000010439 graphite Substances 0.000 claims abstract description 23
- 238000005219 brazing Methods 0.000 claims abstract description 22
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 22
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 18
- 239000000956 alloy Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 claims abstract description 7
- 238000007747 plating Methods 0.000 claims abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- 239000007791 liquid phase Substances 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- 238000011221 initial treatment Methods 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 claims 1
- 239000000320 mechanical mixture Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 238000005476 soldering Methods 0.000 claims 1
- 238000001291 vacuum drying Methods 0.000 claims 1
- 238000000227 grinding Methods 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 8
- 230000003685 thermal hair damage Effects 0.000 abstract description 7
- 229910000679 solder Inorganic materials 0.000 abstract description 5
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 238000003763 carbonization Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 229910000676 Si alloy Inorganic materials 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000011812 mixed powder Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 229910017945 Cu—Ti Inorganic materials 0.000 description 1
- 229910001096 P alloy Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
一种陶瓷空心球多层钎焊金刚石节块，其特征在于，由以下原料按照质量百分比含量制备而成：12%-20%的金刚石磨粒，2-4%的镀镍石墨颗粒，7-20%的陶瓷空心球，余量为含Cr的镍基合金，含Cr的镍基合金的熔点低于1000℃。本发明的有益效果：首先，与传统烧结金刚石工具相比，由于采用了活性钎料Ni-Cr-Cu-B-Si或Ni-Cr-P钎焊的方法，在金刚石界面处形成Cr的碳化物，其把持强度大幅提高，其次加入镀镍的陶瓷空心球，镀镍使得陶瓷空心球与钎料之间也形成化学冶金结合，不仅满足了砂轮对气孔率的要求，而且气孔为球形。另外，陶瓷空心球的加入，使得节块有一定的脆性，有利于节块的自锐性。添加的石墨可以增加润滑性和降低金刚石的热损伤，在Ni-Cr-B-Si中添加Cu有利于降低金刚石的热损伤。A ceramic hollow ball multilayer brazed diamond block, characterized in that it is prepared from the following raw materials according to the mass percentage content: 12%-20% diamond abrasive grains, 2-4% nickel-plated graphite particles, 7- 20% of ceramic hollow balls, the rest is Cr-containing nickel-based alloys, and the melting point of Cr-containing nickel-based alloys is lower than 1000°C. Beneficial effects of the present invention: First, compared with traditional sintered diamond tools, due to the adoption of the active brazing material Ni-Cr-Cu-B-Si or Ni-Cr-P brazing method, the carbonization of Cr is formed at the diamond interface material, its holding strength is greatly improved, and then nickel-plated ceramic hollow balls are added. Nickel plating makes the chemical metallurgical bond between the ceramic hollow balls and the solder, which not only meets the requirements of the grinding wheel for porosity, but also has spherical pores. In addition, the addition of ceramic hollow balls makes the nodes brittle to a certain extent, which is beneficial to the self-sharpening of the nodes. The added graphite can increase the lubricity and reduce the thermal damage of diamond, and adding Cu to Ni-Cr-B-Si is beneficial to reduce the thermal damage of diamond.
Description
技术领域 technical field
本发明属于超硬磨料工具制造领域，涉及一种陶瓷空心球多层钎焊金刚石节块的制造技术。 The invention belongs to the field of superhard abrasive tool manufacturing, and relates to a manufacturing technology of ceramic hollow ball multilayer brazing diamond nodes.
背景技术 Background technique
随着科技的发展，陶瓷、硅材料、光学玻璃等硬脆材料的初加工、高效高精度加工越来越多，上述材料的切割、磨削常采用金刚石工具。目前，金刚石工具主要是通过烧结、电镀等工艺制造，但烧结、电镀金刚石工具由于金刚石磨粒把持强度较低，常出现磨粒脱落的现象。近年来，国内外采用Ni-Cr-B-Si、Ag-Cu-Ti钎料钎焊技术使金刚石与金属基体通过扩散、溶解、化合反应等提高两者的连接强度，钎焊单层金刚石工具具有磨料硬度高、把持强度高、磨料出露高、加工效率高等优点，因此钎焊金刚石工具在一定程度上解决了电镀金刚石工具的缺点，但钎焊金刚石工具只有单层磨料，因此其使用寿命受到一定得限制。另外，钎焊过程常导致金刚石较大的热损伤。 With the development of science and technology, there are more and more primary processing, high-efficiency and high-precision processing of hard and brittle materials such as ceramics, silicon materials, and optical glass. Diamond tools are often used for cutting and grinding of the above materials. At present, diamond tools are mainly manufactured through sintering, electroplating and other processes, but sintered and electroplated diamond tools often have the phenomenon of abrasive grain falling off due to the low holding strength of diamond abrasive grains. In recent years, Ni-Cr-B-Si, Ag-Cu-Ti solder brazing technology has been adopted at home and abroad to improve the connection strength between diamond and metal matrix through diffusion, dissolution, and chemical reaction, etc., and braze single-layer diamond tools. It has the advantages of high abrasive hardness, high holding strength, high abrasive exposure, and high processing efficiency. Therefore, brazed diamond tools solve the shortcomings of electroplated diamond tools to a certain extent, but brazed diamond tools only have a single layer of abrasive, so their service life subject to certain restrictions. In addition, the brazing process often results in greater thermal damage to the diamond.
传统烧结金属结合剂超硬材料砂轮虽然是多层超硬材料制品，大都为密实型的，砂轮中磨粒出刃难，因此常采用对胎体进行弱化的办法来提高出刃率，但导致磨粒把持强度的下降，容易脱落。另外，在使用之初和磨损后常常造成工具的整形和修锐困难。采用Ni-Cr-B-Si合金制造多层钎焊金刚石砂轮，虽有利于提高金刚石的把持强度，但Ni-Cr-B-Si合金的高强度、高硬度，使其出刃更加困难。国内外尝试开发多孔金属结合剂砂轮，使用的造孔剂主要有无机化合物、可溶性盐类，如尿素、碳酸氢铵、氯化钠、碳酸钠等，其中碳酸氢铵、尿素等通过在热压烧结过程中气体的挥发而产生孔隙，以防止产生的空隙被压缩，难以提高砂轮的强度；而氯化钠等可溶性盐类物质作造孔剂时，其制备的砂轮制品容易吸水影响质量。此种砂轮将多孔结合剂的孔隙结构引入到金属结合剂中去，通过对这种多孔金属结合剂砂轮制造工艺、孔隙控制研究发现，大大改善了传统金属结合剂磨粒不易出刃、修整困难的弊端，降低了砂轮磨削加工中的堵塞现象。但由于砂轮中的孔隙结构降低了金属结合剂对磨粒的把持强度，节块本身的强度也下降，造成磨粒在加工中易脱落失效，有效寿命降低。 Although the traditional sintered metal bond superhard material grinding wheel is a multi-layer superhard material product, most of them are dense, and it is difficult for the abrasive grains to emerge from the grinding wheel. Grasp the drop in strength and fall off easily. In addition, reshaping and sharpening of tools is often difficult during initial use and after wear. Using Ni-Cr-B-Si alloy to make multi-layer brazed diamond grinding wheel is beneficial to improve the holding strength of diamond, but the high strength and high hardness of Ni-Cr-B-Si alloy make it more difficult to cut out the edge. Attempts to develop porous metal bond grinding wheels at home and abroad, the pore-forming agents used mainly include inorganic compounds, soluble salts, such as urea, ammonium bicarbonate, sodium chloride, sodium carbonate, etc., of which ammonium bicarbonate, urea, etc. During the sintering process, the volatilization of gas creates pores to prevent the generated voids from being compressed, which makes it difficult to improve the strength of the grinding wheel; and when soluble salts such as sodium chloride are used as pore-forming agents, the prepared grinding wheel products are easy to absorb water and affect the quality. This kind of grinding wheel introduces the pore structure of the porous bond into the metal bond. Through the research on the manufacturing process and pore control of this porous metal bond grinding wheel, it is found that the traditional metal bond abrasive grains are not easy to come out and the dressing is difficult. Disadvantages, reducing the clogging phenomenon in the grinding wheel grinding process. However, because the pore structure in the grinding wheel reduces the holding strength of the metal bond to the abrasive grains, the strength of the segment itself also decreases, causing the abrasive grains to fall off and fail during processing, and the effective life is reduced.
发明内容 Contents of the invention
本发明所要解决技术问题是，在Ni-Cr-B-Si合金钎焊金刚石实现金刚石高把持强度基础上，将陶瓷空心球引入多层钎焊金刚石工具中，实现金刚石出刃高、较大的容屑空间、较高的把持强度；但Ni-Cr-B-Si合金对陶瓷空心球来讲，其润湿性较差，采取对陶瓷空心球进行化学镀镍，表面金属化后，再进行多层钎焊的办法制作而成的陶瓷空心球多层钎焊金刚石节块。另外，首先考虑到Cu与Ni元素在液态无限互溶，其次对于金刚石为非触媒元素，最后Cu的塑性较好，因此在Ni-Cr-B-Si中添加3-6%（wt）Cu，有利于降低金刚石的热损伤。添加一定量的石墨可以降低金刚石的热损伤和增加润滑性。 The technical problem to be solved by the present invention is, on the basis of Ni-Cr-B-Si alloy brazed diamond to achieve high diamond holding strength, ceramic hollow balls are introduced into multi-layer brazed diamond tools to realize diamond cutting edge height and larger capacity. Chip space, high holding strength; but Ni-Cr-B-Si alloy has poor wettability to ceramic hollow balls, and the ceramic hollow balls are electroless nickel-plated, and the surface is metallized, and then more Ceramic hollow ball multi-layer brazed diamond nodule made by multi-layer brazing method. In addition, first of all, considering that Cu and Ni elements are infinitely soluble in the liquid state, secondly, diamond is a non-catalytic element, and finally Cu has better plasticity, so adding 3-6% (wt) Cu to Ni-Cr-B-Si has It is beneficial to reduce the thermal damage of diamond. Adding a certain amount of graphite can reduce the thermal damage of diamond and increase the lubricity.
为了解决上述问题采用以下技术方案：一种陶瓷空心球多层钎焊金刚石节块，其特征在于，由以下原料按照质量百分比含量制备而成：12%-20%的金刚石磨粒，2-4%的镀镍石墨颗粒，7-20%的陶瓷空心球，余量为含Cr的镍基合金，含Cr的镍基合金的熔点低于1000℃。 In order to solve the above problems, the following technical scheme is adopted: a ceramic hollow ball multilayer brazed diamond block, which is characterized in that it is prepared from the following raw materials according to the mass percentage content: 12%-20% diamond abrasive grains, 2-4 % of nickel-plated graphite particles, 7-20% of ceramic hollow balls, and the rest is nickel-based alloys containing Cr, whose melting point is lower than 1000 °C.
所述的金刚石磨粒粒径为100-300μm；镀镍石墨颗粒粒径为30-50μm；陶瓷空心球为氧化铝或氧化锆颗粒，粒径为100-120μm；含Cr的镍基合金为Ni-Cr-Cu-B-Si或Ni-Cr-P，粒径为20-50μm。 The diamond abrasive particle size is 100-300 μm; the nickel-plated graphite particle size is 30-50 μm; the ceramic hollow ball is alumina or zirconia particles, the particle size is 100-120 μm; the nickel-based alloy containing Cr is Ni -Cr-Cu-B-Si or Ni-Cr-P with a particle size of 20-50 μm.
所述的陶瓷空心球表面化学镀镍，镍层厚度为20~80μm。 The surface of the ceramic hollow sphere is chemically plated with nickel, and the thickness of the nickel layer is 20-80 μm.
所述的含Cr的镍基合金中Cr含量>12wt%。 The Cr content in the Cr-containing nickel-based alloy is >12wt%.
制作方法如下： The production method is as follows:
（1）将陶瓷空心球化学镀镍作为造孔材料，与金刚石磨粒、含Cr的镍基合金、镀镍石墨颗粒进行机械混合，添加聚乙烯醇，并压制成节块； (1) Electroless nickel-plated ceramic hollow balls are used as pore-forming materials, mechanically mixed with diamond abrasive grains, Cr-containing nickel-based alloys, and nickel-plated graphite particles, added with polyvinyl alcohol, and pressed into nodules;
（2）将上述节块在加热温度900-1060℃、保温时间10-30min，在真空度为10-2Pa的真空炉内进行加热高温液相钎焊，促使金刚石磨粒、镀镍石墨颗粒、陶瓷空心球与含Cr的镍基合金之间分别发生化学冶金结合，制作具有高气孔率与高强度特性的陶瓷空心球多层钎焊金刚石砂轮。 (2) Heat the above-mentioned joints at a heating temperature of 900-1060°C and a holding time of 10-30min for high-temperature liquid-phase brazing in a vacuum furnace with a vacuum degree of 10-2 Pa to promote the diamond abrasive grains and nickel-plated graphite grains 1. Chemical metallurgical bonding occurs between ceramic hollow balls and Cr-containing nickel-based alloys to produce ceramic hollow ball multilayer brazed diamond grinding wheels with high porosity and high strength characteristics.
本发明的有益效果：首先，与传统烧结金刚石工具相比，由于采用了活性钎料Ni-Cr-Cu-B-Si或Ni-Cr-P钎焊的方法，在金刚石界面处形成Cr的碳化物，其把持强度大幅提高，其次加入镀镍的陶瓷空心球，镀镍使得陶瓷空心球与钎料之间也形成化学冶金结合，不仅满足了砂轮对气孔率的要求，而且气孔为球形。另外，陶瓷空心球的加入，使得节块有一定的脆性，有利于节块的自锐性。添加的石墨可以增加润滑性和降低金刚石的热损伤，在Ni-Cr-B-Si中添加Cu有利于降低金刚石的热损伤。 Beneficial effects of the present invention: First, compared with traditional sintered diamond tools, due to the adoption of the active brazing material Ni-Cr-Cu-B-Si or Ni-Cr-P brazing method, the carbonization of Cr is formed at the diamond interface material, its holding strength is greatly improved, and then nickel-plated ceramic hollow balls are added. Nickel plating makes the chemical metallurgical bond between the ceramic hollow balls and the solder, which not only meets the requirements of the grinding wheel for porosity, but also has spherical pores. In addition, the addition of ceramic hollow balls makes the nodes brittle to a certain extent, which is beneficial to the self-sharpening of the nodes. The added graphite can increase the lubricity and reduce the thermal damage of diamond, and adding Cu to Ni-Cr-B-Si is beneficial to reduce the thermal damage of diamond.
具体实施方式 Detailed ways
实施例1：一种陶瓷空心球多层钎焊金刚石节块，由以下原料按照质量百分比含量制备而成：选用18%金刚石磨粒，粒径大约为260-350μm；2.5%的镀镍石墨颗粒，其粒径为30-50μm；10%的氧化铝陶瓷空心球，直径为100-120μm，表面化学镀镍，厚50μm；余量为Ni-Cr-Cu-B-Si合金粉末，其组分的含量为：1.6%B，3.2%Si，16%Cr，4%Cu，余量为Ni。将上述粉末混合均匀，然后将所述混合粉末添加5%（wt）的聚乙烯醇，按一定质量装填在模具中冷压成形，粉末成形压力为15-20MPa，保压3min，节块尺寸根据砂轮的要求确定尺寸。 Example 1: A ceramic hollow sphere multilayer brazed diamond block is prepared from the following raw materials according to the mass percentage content: 18% diamond abrasive grains with a particle size of about 260-350 μm; 2.5% nickel-plated graphite particles , the particle size is 30-50μm; 10% alumina ceramic hollow balls, the diameter is 100-120μm, the surface is electroless nickel-plated, the thickness is 50μm; the balance is Ni-Cr-Cu-B-Si alloy powder, its composition The content is: 1.6%B, 3.2%Si, 16%Cr, 4%Cu, and the balance is Ni. Mix the above powder evenly, then add 5% (wt) polyvinyl alcohol to the mixed powder, fill it in a mold according to a certain mass, and cold press it into a mold. The powder forming pressure is 15-20MPa, and the pressure is kept for 3 minutes. The requirements of the grinding wheel determine the size.
将上述节块放入真空度为10-2Pa的真空炉内进行加热高温液相钎焊，在1050℃保温时间10min，然后随炉冷却，至100℃以下取出，在钎焊过程中金刚石磨粒、石墨颗粒、氧化铝陶瓷空心球颗粒与Ni-Cr-Cu-B-Si钎料之间分别发生化学冶金结合，制作具有高气孔率与高强度特性的陶瓷空心球多层钎焊金刚石节块。 Put the above nodes into a vacuum furnace with a vacuum degree of 10 -2 Pa for heating and high-temperature liquid-phase brazing, hold at 1050°C for 10 minutes, then cool with the furnace, and take them out below 100°C. During the brazing process, the diamond grinding The chemical metallurgical combination between the particles, the graphite particles, the alumina ceramic hollow sphere particles and the Ni-Cr-Cu-B-Si brazing filler metal respectively produces a ceramic hollow sphere multilayer brazed diamond joint with high porosity and high strength characteristics. piece.
实施例2：一种陶瓷空心球多层钎焊金刚石节块，由以下原料按照质量百分比含量制备而成：选用15%金刚石磨粒，粒径大约为200-360μm，3%的镀镍石墨颗粒，其粒径为30-50μm，15%的氧化铝陶瓷空心球，直径为100-120μm，表面化学镀镍，厚50μm；余量为Ni-Cr-Cu-B-Si合金，其组分的含量为：3.6%B，4.2%Si，16%Cr，3%Cu，余量为Ni。将上述粉末混合均匀，然后将所述混合粉末添加3%（wt）的聚乙烯醇，按一定质量装填在模具中冷压成形，粉末成形压力为20-25MPa，保压3min，节块尺寸根据砂轮的要求确定尺寸。 Example 2: A ceramic hollow sphere multilayer brazed diamond block is prepared from the following raw materials according to the mass percentage content: 15% diamond abrasive grains with a particle size of about 200-360 μm, and 3% nickel-plated graphite particles , the particle size is 30-50μm, 15% alumina ceramic hollow balls, the diameter is 100-120μm, the surface is electroless nickel-plated, the thickness is 50μm; the balance is Ni-Cr-Cu-B-Si alloy, its composition The content is: 3.6%B, 4.2%Si, 16%Cr, 3%Cu, and the balance is Ni. Mix the above powder evenly, then add 3% (wt) polyvinyl alcohol to the mixed powder, fill it in a mold according to a certain mass, and cold press it into a mold. The powder forming pressure is 20-25 MPa, and the pressure is maintained for 3 minutes. The requirements of the grinding wheel determine the size.
将上述节块放入真空度为10-2Pa的真空炉内进行加热高温液相钎焊，在1050℃保温8min，然后随炉冷却，至100℃以下取出，在保温阶段金刚石磨粒、石墨颗粒、氧化铝陶瓷空心球颗粒与Ni-Cr-Cu-B-Si钎料之间分别发生化学冶金结合，制作具有高气孔率与高强度特性的陶瓷空心球多层钎焊金刚石节块。 Put the above nodes into a vacuum furnace with a vacuum degree of 10 -2 Pa for heating and high-temperature liquid-phase brazing, hold at 1050°C for 8 minutes, then cool with the furnace, and take them out below 100°C. During the holding stage, diamond abrasive grains, graphite Chemical metallurgical bonding occurs between the particles, alumina ceramic hollow sphere particles and Ni-Cr-Cu-B-Si solder respectively, and a ceramic hollow sphere multilayer brazing diamond block with high porosity and high strength characteristics is produced.
实施例3：一种陶瓷空心球多层钎焊金刚石节块，由以下原料按照质量百分比含量制备而成：选用16%金刚石磨粒，粒径大约为200-320μm，3.5%的镀镍石墨颗粒，其粒径为30-50μm，17%的氧化铝陶瓷空心球，直径为100-120μm，表面化学镀镍，厚45μm；余量为Ni-Cr-P合金，其组分的含量为：15（wt）%Cr， 10（wt）%P， 0.01（wt）%B，余量为Ni。将上述粉末混合均匀，然后将所述混合粉末按一定质量装填在模具中冷压成形，粉末成形压力为25-30MPa，保压3min，节块尺寸根据砂轮的要求确定尺寸。 Example 3: A ceramic hollow sphere multilayer brazed diamond block is prepared from the following raw materials according to the mass percentage content: 16% diamond abrasive grains, with a particle size of about 200-320 μm, and 3.5% nickel-plated graphite particles , the particle size is 30-50μm, 17% alumina ceramic hollow balls, the diameter is 100-120μm, the surface is electroless nickel-plated, the thickness is 45μm; the balance is Ni-Cr-P alloy, and the content of its components is: 15 (wt)%Cr, 10(wt)%P, 0.01(wt)%B, the balance being Ni. Mix the above powders evenly, then fill the mixed powders with a certain mass in a mold for cold pressing, the powder forming pressure is 25-30MPa, hold the pressure for 3 minutes, and the size of the nodes is determined according to the requirements of the grinding wheel.
将上述节块在温度980℃保温10min，在真空度为10-2Pa的真空炉内进行加热高温液相钎焊，然后随炉冷却，至100℃以下取出，高温钎焊促使金刚石磨粒、石墨颗粒、氧化铝陶瓷空心球颗粒与Ni-Cr-P钎料之间分别发生化学冶金结合，制作具有高气孔率与高强度特性的陶瓷空心球多层钎焊金刚石节块。 Keep the above-mentioned nodes at 980°C for 10 minutes, heat and high-temperature liquid-phase brazing in a vacuum furnace with a vacuum degree of 10 -2 Pa, then cool with the furnace, and take them out below 100°C. High-temperature brazing promotes diamond abrasive grains, Graphite particles, alumina ceramic hollow sphere particles and Ni-Cr-P solder are combined chemically and metallurgically to produce ceramic hollow sphere multilayer brazed diamond nodes with high porosity and high strength characteristics.
实施例4：一种陶瓷空心球多层钎焊金刚石节块，由以下原料按照质量百分比含量制备而成：12%-20%的金刚石磨粒，2-4%的镀镍石墨颗粒，7-20%的陶瓷空心球，余量为含Cr的镍基合金。其熔点低于1000℃。 Embodiment 4: A ceramic hollow ball multilayer brazed diamond segment is prepared from the following raw materials according to the mass percentage content: 12%-20% diamond abrasive grains, 2-4% nickel-plated graphite particles, 7- 20% ceramic hollow balls, the rest is nickel-based alloys containing Cr. Its melting point is below 1000°C.
实施例5：一种陶瓷空心球多层钎焊金刚石节块，由以下原料按照质量百分比含量制备而成：12%-20%的金刚石磨粒，2-4%的镀镍石墨颗粒，7-20%的陶瓷空心球，余量为含Cr的镍基合金。其熔点低于1000℃。 Embodiment 5: A ceramic hollow ball multilayer brazed diamond block is prepared from the following raw materials according to the mass percentage content: 12%-20% diamond abrasive grains, 2-4% nickel-plated graphite particles, 7- 20% ceramic hollow balls, the rest is nickel-based alloys containing Cr. Its melting point is below 1000°C.
其中，金刚石磨粒粒径为100-300μm；镀镍石墨颗粒粒径为30-50μm；陶瓷空心球为氧化铝或氧化锆颗粒，粒径为100-120μm，陶瓷空心球表面化学镀镍，厚20~80μm；含Cr的镍基合金为Ni-Cr-Cu-B-Si或Ni-Cr-P，粒径为20-50μm，Cr含量>12wt%。 Among them, the particle size of diamond abrasive is 100-300μm; the particle size of nickel-plated graphite is 30-50μm; 20~80μm; the nickel-based alloy containing Cr is Ni-Cr-Cu-B-Si or Ni-Cr-P, the particle size is 20-50μm, and the Cr content is >12wt%.
实施例6：一种陶瓷空心球多层钎焊金刚石节块的制作方法，（1）将陶瓷空心球化学镀镍作为造孔材料，与金刚石磨粒、含Cr的镍基合金、镀镍石墨颗粒进行机械混合，添加2%（wt）聚乙烯醇，所述的2%为混合粉末总质量的2%。并压制成节块； Example 6: A method for manufacturing ceramic hollow sphere multilayer brazed diamond segments, (1) Electroless nickel plating of ceramic hollow spheres is used as a pore-forming material, together with diamond abrasive grains, Cr-containing nickel-based alloys, and nickel-plated graphite The particles are mechanically mixed, and 2% (wt) polyvinyl alcohol is added, the said 2% being 2% of the total mass of the mixed powder. and pressed into knots;
（2）将上述节块在加热温度900-1060℃、保温时间10-30min，在真空度为10-2Pa的真空炉内进行加热高温液相钎焊，促使金刚石磨粒、镀镍石墨颗粒、陶瓷空心球与含Cr的镍基合金之间分别发生化学冶金结合，制作具有高气孔率与高强度特性的陶瓷空心球多层钎焊金刚石砂轮。 (2) Heat the above-mentioned joints at a heating temperature of 900-1060°C and a holding time of 10-30min for high-temperature liquid-phase brazing in a vacuum furnace with a vacuum degree of 10-2 Pa to promote the diamond abrasive grains and nickel-plated graphite grains 1. Chemical metallurgical bonding occurs between ceramic hollow balls and Cr-containing nickel-based alloys to produce ceramic hollow ball multilayer brazed diamond grinding wheels with high porosity and high strength characteristics.
其他同实施例5。 Others are the same as embodiment 5.
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| CN111203811B (en) * | 2020-03-18 | 2022-02-22 | 湖南科技大学 | Preparation and electrolytic finishing method of brazing grinding wheel with self-lubricating function and good electrolytic film forming property |
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