CN101829587B - Powdered catalyst for synthesizing octahedral diamond - Google Patents

Abstract

Translated fromChinese

本发明公开了一种合成八面体金刚石用粉末触媒，按重量百分比计，其合金成分为：Nb3-7％、Mn 3-5％、Co 2-2.5％、Si 0.1-1％、B4C 0.5-1％、V0.02％，余量为Fe。本发明粉末触媒的制备方法以上述重量百分比计合金成分按比例配好后，在惰性气体的保护下将配料融化制备成预制合金锭，然后将预制合金锭重熔，最后利用高压气体3-4.5MPa将金属液流击碎雾化成金属粉末，颗粒成球状，将制备的触媒粉进行筛分。用本发明触媒合成八面体金刚石能够比已有技术提高产量40％左右，并且金刚石的晶型规则度提高了35％左右，合成的八面体含量可达80-87％。本发明所述的粉末触媒氧含量≤100PPm，化学成分均匀，颗粒球型度好，粒度范围为-200/+500，该粒度范围的比例为75-95％。The invention discloses a powder catalyst for synthesizing octahedral diamond. The alloy components are: Nb3-7%, Mn3-5%, Co2-2.5%, Si0.1-1%, B4C0.5- 1%, V0.02%, and the balance is Fe. In the preparation method of the powder catalyst of the present invention, after the alloy components are prepared in proportion according to the above weight percentage, the ingredients are melted under the protection of an inert gas to prepare a prefabricated alloy ingot, and then the prefabricated alloy ingot is remelted, and finally the high pressure gas is used for 3-4.5 MPa crushes the metal liquid flow and atomizes it into metal powder, the particles are spherical, and the prepared catalyst powder is sieved. Using the catalyst of the invention to synthesize octahedral diamond can increase the output by about 40% compared with the prior art, and the crystal form regularity of the diamond is increased by about 35%, and the content of the synthesized octahedron can reach 80-87%. The oxygen content of the powder catalyst in the invention is less than or equal to 100PPm, the chemical composition is uniform, the sphericity of the particles is good, the particle size range is -200/+500, and the ratio of the particle size range is 75-95%.

Description

Translated fromChinese

一种合成八面体金刚石用粉末触媒A kind of powder catalyst for synthesizing octahedral diamond

技术领域technical field

本发明涉及合成金刚石产品使用的粉末触媒，是一种合成八面体金刚石用粉末触媒。The invention relates to a powder catalyst used for synthesizing diamond products, which is a powder catalyst for synthesizing octahedral diamond.

背景技术Background technique

在金刚石的合成工艺中触媒是必备原料，合成金刚石欲得到不同晶形时使用的触媒不同。目前，在合成八面体金刚石工艺中使用的粉末触媒，一般以65-70％的铁和30-35％的镍为主要原料，这种触媒虽然在合成其它晶型金刚石时具有一定优点，但是，在合成八面体金刚石时则易出现较多不足：合成稳定性较差、产量低、晶型差、八面体含量不够等；由于上述不足导致八面体金刚石的合成成本相对较高，不能形成规模化生产。由于八面体金刚石具有锋利度高、自锐性好、硬度高等优点，是制作高精、高效等磨削工具的首选材料，因此，在八面体金刚石的产量无法提高的情况下，八面体金刚石的生产成本无法降低，从而影响下游企业的生产效率。Catalyst is an essential raw material in the synthesis process of diamond, and different catalysts are used when synthesizing diamond to obtain different crystal forms. At present, the powder catalyst used in the process of synthesizing octahedral diamond generally uses 65-70% iron and 30-35% nickel as the main raw materials. Although this catalyst has certain advantages in the synthesis of other crystal diamonds, however, When synthesizing octahedral diamond, many problems are prone to occur: poor synthesis stability, low yield, poor crystal form, insufficient octahedron content, etc.; due to the above shortcomings, the synthesis cost of octahedral diamond is relatively high and cannot be scaled up. Production. Because octahedral diamond has the advantages of high sharpness, good self-sharpening, and high hardness, it is the first choice material for making high-precision and high-efficiency grinding tools. Production costs cannot be reduced, thus affecting the production efficiency of downstream enterprises.

发明内容Contents of the invention

本发明的目的是，提供一种合成八面体金刚石用粉末触媒，使它解决已有技术的不足，从而增加八面体金刚石的产量。The purpose of the present invention is to provide a powder catalyst for synthesizing octahedral diamond, so that it can solve the deficiencies of the prior art, thereby increasing the output of octahedral diamond.

本发明为实现上述目的通过以下技术方案实现：一种合成八面体金刚石用粉末触媒，按重量百分比计，其合金成分为：Nb3-7％、Mn 3-5％、C_O 2-2.5％、Si 0.1-1％、B₄C 0.5-1％、V 0.02％，余量为Fe。The present invention realizes above-mentioned purpose through following technical scheme: a kind of powder catalyst for synthesizing octahedral diamond, by weight percentage, its alloy composition is: Nb3-7%, Mn 3-5%,_CO 2-2.5%, Si 0.1-1%, B₄ C 0.5-1%, V 0.02%, and the balance is Fe.

本发明所述粉末触媒按重量百分比计，其合金成分为：Nb 5％、Mn 4％、C_O 2％、Si 0.5％、B₄C 0.75％、V 0.02％，余量为Fe。The powder catalyst of the present invention is calculated by weight percentage, and its alloy composition is: Nb 5%, Mn 4%,_CO 2%, Si 0.5%, B₄ C 0.75%, V 0.02%, and the balance is Fe.

本发明所述粉末触媒按重量百分比计，其合金成分为：Nb 7％、Mn 5％、C_O 2.5％、Si1％、B₄C 1％、V 0.02％，余量为Fe。The powder catalyst of the present invention is calculated by weight percentage, and its alloy composition is: Nb 7%, Mn 5%,_CO 2.5%, Si 1%, B₄ C 1%, V 0.02%, and the balance is Fe.

本发明所述粉末触媒按重量百分比计，其合金成分为：Nb 3％、Mn 3％、C_O 2％、Si 0.1％、B₄C 0.5％、V 0.02％，余量为Fe。The powder catalyst of the present invention is calculated by weight percentage, and its alloy composition is: Nb 3%, Mn 3%,_CO 2%, Si 0.1%, B₄ C 0.5%, V 0.02%, and the balance is Fe.

本发明所述粉末触媒组分中加入Mn、V和C_O，能够降低触媒中的氧含量，使氧含量达到≤100PPm，增加触媒活化性能，降低金刚石八面体生成温度，有利于八面体金刚石的转化。特别是V、CO作为金刚石和石墨的相间活化元素，可促进金刚石的生长速度加快，在促进金刚石生长速度加快的同时，加入的Mn能够促进金刚石不同晶面的生长速度，使金刚石向八面体转化，保证金刚石均匀成核。为了更进一步使金刚石八面体的晶型转化，并促其优质生长，在组分中加入了Nb和B₄C。本发明组分中的Si作为非自发成核的促进剂使用，在八面体金刚石合成中能诱发并促进金刚石面非自发成核，能够提高金刚石的成核率和产量。Adding Mn, V and_CO to the powder catalyst component of the present invention can reduce the oxygen content in the catalyst, make the oxygen content reach ≤ 100PPm, increase the activation performance of the catalyst, reduce the formation temperature of diamond octahedron, and facilitate the formation of octahedral diamond transform. In particular, V and CO, as the interphase activation elements of diamond and graphite, can accelerate the growth rate of diamond. While accelerating the growth rate of diamond, the added Mn can promote the growth rate of different crystal planes of diamond, making diamond transform into octahedron. , to ensure uniform nucleation of diamond. In order to further transform the crystal form of diamond octahedron and promote its high-quality growth, Nb and B₄ C are added to the components. The Si in the composition of the present invention is used as a non-spontaneous nucleation accelerator, which can induce and promote the non-spontaneous nucleation of the diamond surface in the synthesis of octahedral diamond, and can improve the nucleation rate and yield of diamond.

本发明所述粉末触媒各元素组合后，能够提高八面体金刚石的合成稳定性。由于用已有触媒合成八面体金刚石时需要使用1290℃左右高温，使在合成中使用的加热管及加热片等装置在此温度下易产生不稳定性，本发明组分能够降低触媒中的氧含量，增加触媒活化性能，使触媒熔点达到1200-1210℃，从而降低了八面体金刚石的生成温度在1230℃，保证了合成过程中的稳定性。用本发明触媒合成八面体金刚石能够比已有技术提高产量40％左右，并且金刚石的晶型规则度提高了35％左右，合成的八面体含量可达80-87％。本发明所述的粉末触媒氧含量≤100PPm，化学成分均匀，颗粒球型度好，粒度范围为-200/+500，该粒度范围的比例为75-95％。After the elements of the powder catalyst in the present invention are combined, the synthesis stability of octahedral diamond can be improved. Since it is necessary to use a high temperature of about 1290°C when using the existing catalyst to synthesize octahedral diamond, the heating tubes and heating plates used in the synthesis are prone to instability at this temperature. The components of the present invention can reduce the oxygen in the catalyst. content, increase the activation performance of the catalyst, make the melting point of the catalyst reach 1200-1210°C, thereby reducing the formation temperature of octahedral diamond at 1230°C, and ensuring the stability during the synthesis process. Using the catalyst of the invention to synthesize octahedral diamond can increase the output by about 40% compared with the prior art, and the crystal form regularity of the diamond is increased by about 35%, and the content of the synthesized octahedron can reach 80-87%. The oxygen content of the powder catalyst in the invention is less than or equal to 100PPm, the chemical composition is uniform, the sphericity of the particles is good, the particle size range is -200/+500, and the ratio of the particle size range is 75-95%.

具体实施方式Detailed ways

实施例Example

本发明所述粉末触媒按重量百分比计，其合金成分可以有多种组合，例如：The powder catalyst of the present invention is calculated by weight percentage, and its alloy composition can have multiple combinations, for example:

1、Nb 7％、Mn 5％、CO 2.5％、Si1％、B₄C 1％、V 0.02％，余量为Fe。1. Nb 7%, Mn 5%, CO 2.5%, Si 1%, B₄ C 1%, V 0.02%, and the balance is Fe.

2、Nb 5％、Mn 4％、CO 2.2％、Si 0.8％、B₄C 1％、V 0.02％，余量为Fe。2. Nb 5%, Mn 4%, CO 2.2%, Si 0.8%, B₄ C 1%, V 0.02%, and the balance is Fe.

3、Nb 3％、Mn 3％、CO 2％、Si 0.1％、B₄C 0.5％、V 0.02％，余量为Fe。3. Nb 3%, Mn 3%, CO 2%, Si 0.1%, B₄ C 0.5%, V 0.02%, and the balance is Fe.

4、Nb 5％、Mn 4％、CO 2％、Si 0.5％、B₄C 0.75％、V 0.02％，余量为Fe。4. Nb 5%, Mn 4%, CO 2%, Si 0.5%, B₄ C 0.75%, V 0.02%, and the balance is Fe.

上述本发明粉末触媒的制备方法如下：以重量百分比计，取配料合金成分为：Nb3-7％、Mn 3-5％、C_O 2-2.5％、Si 0.1+1％、B₄C 0.5-1％、V 0.02％，余量为Fe。The preparation method of the above-mentioned powder catalyst of the present invention is as follows: by weight percentage, the composition of the batch alloy is: Nb3-7%, Mn 3-5%,_CO 2-2.5%, Si 0.1+1%, B₄ C 0.5- 1%, V 0.02%, and the balance is Fe.

按比例配好后，在惰性气体的保护下将配料融化，制备成预制合金锭，然后将预制合金锭在1350-1500℃温度下重熔，重熔过程中通入氮气，最后利用高压气体3-4.5Mpa将金属液流击碎雾化成金属粉末。制成的触媒粉粒度多为100目以细，500目以粗，颗粒成球状。After the proportion is prepared, the ingredients are melted under the protection of inert gas to prepare a prefabricated alloy ingot, and then the prefabricated alloy ingot is remelted at a temperature of 1350-1500°C, nitrogen gas is introduced during the remelting process, and finally the high pressure gas 3 -4.5Mpa smashes the metal liquid flow and atomizes it into metal powder. The particle size of the prepared catalyst powder is mostly finer than 100 mesh, coarser than 500 mesh, and the particles are spherical.

最后进行筛分，将制备的触媒粉进行筛分，选择粒度为-200/+500进行使用，该粒度范围料比例在75％-95％。Finally, sieving is carried out, and the prepared catalyst powder is sieved, and a particle size of -200/+500 is selected for use, and the material ratio of the particle size range is 75%-95%.

Claims (4)

Translated fromChinese

1.一种合成八面体金刚石用粉末触媒，其特征在于：按重量百分比计，其合金成分为：Nb3-7％、Mn 3-5％、Co 2-2.5％、Si 0.1-1％、B₄C 0.5-1％、V 0.02％，余量为Fe。1. A powder catalyst for synthesizing octahedral diamond is characterized in that: by weight percentage, its alloy composition is: Nb3-7%, Mn 3-5%, Co 2-2.5%, Si 0.1-1%, B₄ C 0.5-1%, V 0.02%, the balance is Fe.2.根据权利要求1所述的一种合成八面体金刚石用粉末触媒，其特征在于：按重量百分比计，其合金成分为：Nb 5％、Mn 4％、Co 2％、Si 0.5％、B₄C 0.75％、V 0.02％，余量为Fe。2. a kind of synthetic octahedral diamond powder catalyst according to claim 1 is characterized in that: by weight percentage, its alloy composition is: Nb 5%, Mn 4%, Co 2%, Si 0.5%, B₄ C 0.75%, V 0.02%, and the balance is Fe.3.根据权利要求1所述的一种合成八面体金刚石用粉末触媒，其特征在于：按重量百分比计，其合金成分为：Nb 7％、Mn 5％、Co 2.5％、Si1％、B₄C 1％、V 0.02％，余量为Fe。3. a kind of synthetic octahedral diamond powder catalyst according to claim 1 is characterized in that: by weight percentage, its alloy composition is: Nb 7%, Mn 5%, Co 2.5%, Si1%, B₄ C 1%, V 0.02%, and the balance is Fe.4.根据权利要求1所述的一种合成八面体金刚石用粉末触媒，其特征在于：按重量百分比计，其合金成分为：Nb 3％、Mn 3％、Co 2％、Si 0.1％、B₄C 0.5％、V 0.02％，余量为Fe。4. a kind of synthetic octahedral diamond powder catalyst according to claim 1 is characterized in that: by weight percentage, its alloy composition is: Nb 3%, Mn 3%, Co 2%, Si 0.1%, B₄ C 0.5%, V 0.02%, and the balance is Fe.