CN101450870A - Preparation apparatus of graphite metal wrap for thermal isostatic pressing - Google Patents
Preparation apparatus of graphite metal wrap for thermal isostatic pressing Download PDFInfo
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- CN101450870A CN101450870A CNA2007101587569A CN200710158756A CN101450870A CN 101450870 A CN101450870 A CN 101450870A CN A2007101587569 A CNA2007101587569 A CN A2007101587569A CN 200710158756 A CN200710158756 A CN 200710158756A CN 101450870 A CN101450870 A CN 101450870A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 222
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 222
- 239000010439 graphite Substances 0.000 title claims abstract description 222
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 66
- 239000002184 metal Substances 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000000462 isostatic pressing Methods 0.000 title 1
- 238000001513 hot isostatic pressing Methods 0.000 claims abstract description 18
- 238000005266 casting Methods 0.000 claims abstract description 17
- 238000003032 molecular docking Methods 0.000 claims description 2
- 239000004332 silver Substances 0.000 abstract description 34
- 229910052709 silver Inorganic materials 0.000 abstract description 33
- 238000000034 method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005470 impregnation Methods 0.000 abstract description 2
- 239000003566 sealing material Substances 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 34
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 15
- 229910052721 tungsten Inorganic materials 0.000 description 15
- 239000010937 tungsten Substances 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000007770 graphite material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000897 Babbitt (metal) Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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Abstract
本发明涉及高性能石墨密封材料的制备技术，具体为热等静压用石墨金属包套的制备装置。该装置设有石墨柱、金属棒、石墨垫片、石墨坩埚盖、石墨坩埚、浇铸口，石墨坩埚内装有石墨柱，石墨柱四周留有用于填充金属的间隙，石墨柱下表面与石墨坩埚内底部设置的石墨垫片之间插设有金属棒，石墨柱上表面与石墨坩埚顶部设置的石墨坩埚盖之间插设有金属棒，石墨柱上表面设有石墨垫片，金属棒穿过该石墨垫片，石墨坩埚盖上开设有浇铸口。本发明通过轴向固定和径向固定法将石墨柱悬于石墨坩埚内，减少了金属银的浸渍余量，降低了制造成本；由于减少了石墨柱外表面包覆银的厚度，减少了浇铸后的开裂，提高了成品率。
The invention relates to a preparation technology of a high-performance graphite sealing material, in particular to a preparation device of a graphite metal sheath for hot isostatic pressing. The device is equipped with a graphite column, a metal rod, a graphite gasket, a graphite crucible cover, a graphite crucible, and a casting port. The graphite column is equipped with a graphite column, and there are gaps around the graphite column for filling metal. The lower surface of the graphite column and the interior of the graphite crucible A metal rod is inserted between the graphite gaskets arranged at the bottom, a metal rod is inserted between the upper surface of the graphite column and the graphite crucible cover arranged on the top of the graphite crucible, a graphite gasket is arranged on the upper surface of the graphite column, and the metal rod passes through the Graphite gasket, the graphite crucible cover is provided with a casting port. The present invention suspends the graphite column in the graphite crucible through the axial fixing and radial fixing methods, which reduces the impregnation allowance of metallic silver and reduces the manufacturing cost; because the thickness of the outer surface of the graphite column coated with silver is reduced, the casting process is reduced. The final cracking improves the yield.
Description
技术领域： Technical field:
本发明涉及高性能石墨密封材料的制备技术，具体为一种热等静压用石墨金属包套的制备装置。The invention relates to a preparation technology of a high-performance graphite sealing material, in particular to a preparation device for a graphite metal sheath for hot isostatic pressing.
背景技术： Background technique:
浸银石墨材料具有高密度、高强度、耐磨，特别是导热性能、导电性能和密封性能好等优点，在国防、电子、机械等很多领域得到应用。但是由于银是贵重金属，制备过程中需要热等静压处理，使其制造成本很高，因此，提高生产效率，提高成品率，降低银耗量尤为重要。Silver-impregnated graphite material has the advantages of high density, high strength, wear resistance, especially good thermal conductivity, electrical conductivity and sealing performance, and has been applied in many fields such as national defense, electronics, and machinery. But because silver is a precious metal, hot isostatic pressing treatment is required in the preparation process, making its manufacturing cost very high. Therefore, it is particularly important to improve production efficiency, improve yield and reduce silver consumption.
制造浸银石墨需要进行热等静压处理，才能使熔融的金属银均匀地渗透进石墨材料的孔隙中。在热等静压处理前需要通过浇铸的方法在圆柱形欲浸银石墨(简称石墨柱)表面均匀的包覆金属银，形成金属银包套。由于金属银的密度为10.5g/cm3，而石墨的密度仅为1.8g/cm3，石墨柱在熔融金属银中受到很大的浮力。为了浇铸金属银时不使石墨柱飘浮起来，也不让石墨柱碰到坩埚壁，浇铸前必须将石墨柱固定，且悬在石墨坩埚中心位置。The manufacture of silver-impregnated graphite requires hot isostatic pressing to allow molten metallic silver to penetrate evenly into the pores of the graphite material. Before the hot isostatic pressing treatment, it is necessary to uniformly coat metallic silver on the surface of cylindrical graphite to be impregnated with silver (referred to as graphite column) by casting method to form a metallic silver sheath. Since the density of metallic silver is 10.5g/cm 3 , while that of graphite is only 1.8g/cm 3 , the graphite column is subject to great buoyancy in molten metallic silver. In order not to make the graphite column float up when casting silver metal, and not let the graphite column touch the crucible wall, the graphite column must be fixed before casting and suspended at the center of the graphite crucible.
发明内容： Invention content:
本发明的目的是提供一种热等静压用石墨金属包套的制备装置，在石墨表面均匀的包覆金属。The purpose of the present invention is to provide a preparation device for a graphite metal sheath for hot isostatic pressing, which evenly coats the metal on the graphite surface.
本发明的技术方案是：Technical scheme of the present invention is:
热等静压用石墨金属包套的制备装置，该装置设有石墨柱、金属棒、石墨垫片、石墨坩埚盖、石墨坩埚、浇铸口，石墨坩埚内装有石墨柱，石墨柱四周留有用于填充金属的间隙，石墨柱下表面与石墨坩埚内底部设置的石墨垫片之间插设有金属棒，石墨柱上表面与石墨坩埚顶部设置的石墨坩埚盖之间插设有金属棒，石墨柱上表面设有石墨垫片，金属棒穿过该石墨垫片，石墨坩埚盖上开设有浇铸口。A preparation device for graphite metal jackets for hot isostatic pressing. The device is equipped with graphite columns, metal rods, graphite gaskets, graphite crucible covers, graphite crucibles, and casting ports. The graphite crucible is equipped with graphite columns. The metal gap is filled, a metal rod is inserted between the lower surface of the graphite column and the graphite gasket set at the bottom of the graphite crucible, and a metal rod is inserted between the upper surface of the graphite column and the graphite crucible cover set on the top of the graphite crucible, and the graphite column A graphite gasket is arranged on the upper surface, and a metal rod passes through the graphite gasket, and a casting port is opened on the graphite crucible cover.
所述的热等静压用石墨金属包套的制备装置，石墨柱下表面与石墨坩埚内底部设置的石墨垫片之间保持2～5mm的间隙；石墨柱上表面的石墨垫片与石墨坩埚顶部设置的石墨坩埚盖之间保持60～80mm的间隙；石墨柱侧面与石墨坩埚内壁之间保持4～6mm的间隙。In the preparation device for hot isostatic pressing with a graphite metal sheath, a gap of 2 to 5 mm is maintained between the lower surface of the graphite column and the graphite gasket arranged at the inner bottom of the graphite crucible; the graphite gasket on the upper surface of the graphite column and the graphite crucible Keep a gap of 60-80 mm between the graphite crucible lids set on the top; keep a gap of 4-6 mm between the side of the graphite column and the inner wall of the graphite crucible.
所述的热等静压用石墨金属包套的制备装置，石墨柱分上层石墨柱、中间石墨柱、下层石墨柱，中间石墨柱、下层石墨柱的一面带圆柱形凸台，另一面带相同尺寸的圆柱形凹孔，上层石墨柱两面都带圆柱形凹孔，上层石墨柱、中间石墨柱、下层石墨柱对接，对接后的石墨柱最上表面和最下表面都是凹孔；对接后的石墨柱下表面凹孔中插入一段直径与凹孔直径尺寸相同的金属棒，该金属棒的另一端插上带有与金属棒直径尺寸相同凹孔，且外径略小于坩埚内径的石墨垫片，该石墨垫片与石墨坩埚内壁间隙为0.5-1.0mm；对接后的石墨柱上表面插入与凹孔直径尺寸相同的金属棒，金属棒套入一片外径与石墨柱外径相同的石墨垫片，该石墨垫片与石墨柱上表面接触；在金属棒的另一端插上带有与金属棒直径尺寸相同凹孔的石墨坩埚盖，通过石墨坩埚盖上面的孔插入金属棒，顶在石墨柱上表面的石墨垫片上。In the preparation device for hot isostatic pressing with a graphite metal sheath, the graphite column is divided into an upper layer graphite column, a middle graphite column, and a lower layer graphite column. One side of the middle graphite column and the lower layer graphite column has a cylindrical boss, and the other side has the same Cylindrical concave holes of the same size, the upper graphite column has cylindrical concave holes on both sides, the upper graphite column, the middle graphite column, and the lower graphite column are butted, and the upper and lower surfaces of the graphite column after butt joint are concave holes; A metal rod with the same diameter as the hole is inserted into the concave hole on the lower surface of the graphite column, and the other end of the metal rod is inserted with a graphite gasket with the same concave hole as the metal rod, and the outer diameter is slightly smaller than the inner diameter of the crucible , the gap between the graphite gasket and the inner wall of the graphite crucible is 0.5-1.0mm; the upper surface of the docked graphite column is inserted into a metal rod with the same diameter as the concave hole, and the metal rod is inserted into a graphite pad with the same outer diameter as the graphite column The graphite gasket is in contact with the upper surface of the graphite column; insert a graphite crucible cover with a concave hole with the same diameter as the metal rod at the other end of the metal rod, insert the metal rod through the hole on the graphite crucible cover, and push it against the graphite crucible. Graphite gasket on the upper surface of the column.
本发明的有益效果是：The beneficial effects of the present invention are:
1、在制造浸金属石墨需要进行热等静压处理，才能使熔融的金属均匀地渗透进石墨材料的孔隙中。本发明采用轴向固定和径向固定法将石墨柱悬于石墨坩埚内，在热等静压处理前通过浇铸的方法，在石墨表面均匀的包覆金属，形成石墨金属包套。1. Hot isostatic pressing is required in the manufacture of metal-impregnated graphite, so that the molten metal can evenly penetrate into the pores of the graphite material. The invention adopts the axial fixing and radial fixing methods to suspend the graphite column in the graphite crucible, and uniformly coats the metal on the graphite surface by a casting method before the hot isostatic pressing treatment to form a graphite metal sheath.
2、本发明尤其适用于热等静压处理前在圆柱形石墨外表面包覆金属银，制备银包套。采用轴向固定和径向固定法，由于固定了欲浸银石墨柱在坩埚中的位置，缩小了石墨柱与坩埚的间隙，减少了金属银的浸渍余量，降低了制造成本。浇铸出的金属银包覆石墨柱，银包套厚度均匀、完整，提高了成品率。2. The present invention is especially suitable for coating metallic silver on the outer surface of cylindrical graphite before hot isostatic pressing to prepare a silver sheath. By adopting axial fixing and radial fixing methods, since the position of the graphite column to be impregnated with silver is fixed in the crucible, the gap between the graphite column and the crucible is reduced, the impregnation allowance of metallic silver is reduced, and the manufacturing cost is reduced. The cast metal silver-coated graphite column has uniform and complete thickness of the silver-coated sleeve, which improves the yield of finished products.
附图说明： Description of drawings:
图1是热等静压用石墨金属包套的制备装置结构示意图。Fig. 1 is a schematic structural diagram of a preparation device for a graphite metal sheath for hot isostatic pressing.
1石墨柱I；2石墨柱II；3石墨柱III；4金属钨棒I；5石墨垫片I；6金属钨棒II；7石墨垫片II；8石墨坩埚盖；9石墨坩埚；10金属钨棒III；11浇铸口。1 graphite column I; 2 graphite column II; 3 graphite column III; 4 metal tungsten rod I; 5 graphite gasket I; 6 metal tungsten rod II; 7 graphite gasket II; 8 graphite crucible cover; Tungsten rod III; 11 casting port.
具体实施方式： Detailed ways:
本发明在热等静压处理前通过浇铸的方法，在石墨表面均匀的包覆金属，形成石墨金属包套，包覆金属可以为银、铜、铝或巴氏合金等。The present invention uniformly coats metal on the graphite surface by casting method before hot isostatic pressing to form a graphite metal sheath, and the coating metal can be silver, copper, aluminum or babbitt alloy and the like.
以在石墨柱外表面包覆金属银为例，采用轴向固定和径向固定的方法将石墨柱悬于石墨坩埚内。如图1所示，将欲浸银石墨加工成圆柱，一种石墨柱I1、石墨柱III3一面带圆柱形凸台，另一面带相同尺寸的圆柱形凹孔；另一种石墨柱II2两面都带圆柱形凹孔。将加工好的圆柱形石墨柱对接起来，石墨柱I1位于中间，石墨柱II2、石墨柱III3分别位于石墨柱I1上、下两端，使对接后最上表面和最下表面都是凹孔。在下表面凹孔中插入一小段直径与凹孔直径尺寸相同的金属钨棒I4，金属钨棒I4的另一端插上一片带有与金属钨棒I4直径尺寸相同凹孔，且外径略小于坩埚内径的石墨垫片I5，石墨垫片I5与石墨坩埚9内壁间隙为0.5-1.0mm；石墨垫片I5与石墨柱III3下表面保持2～5mm的间隙。欲浸银石墨柱上表面插入1根与凹孔直径尺寸相同的长金属钨棒II6，套入一片外径与石墨柱相同的石墨垫片II7，并且与欲浸银石墨柱II2上表面接触，石墨柱II2上表面的石墨垫片II7与石墨坩埚9顶部设置的石墨坩埚盖8之间保持60～80mm的间隙；石墨柱侧面与石墨坩埚9内壁之间保持4～6mm的间隙。在金属钨棒II6的另一端插上带有与金属钨棒直径尺寸相同凹孔的石墨坩埚盖8，通过石墨坩埚盖8上面的小孔插入3～4根金属钨棒III10，顶在石墨垫片II7上，石墨坩埚盖8上开有浇铸口11。将这一组装体整体装入石墨坩埚9，让石墨坩埚盖8刚好盖住石墨坩埚9上口。Taking the coating of metallic silver on the outer surface of the graphite column as an example, the graphite column is suspended in the graphite crucible by means of axial fixing and radial fixing. As shown in Figure 1, the graphite to be impregnated with silver is processed into a cylinder, a graphite column I1 and a graphite column III3 have a cylindrical boss on one side, and a cylindrical concave hole of the same size on the other side; another graphite column II2 has both sides. With cylindrical recess. Butt the processed cylindrical graphite columns, graphite column I1 is located in the middle, graphite column II2 and graphite column III3 are respectively located at the upper and lower ends of graphite column I1, so that the uppermost surface and the lowermost surface are concave holes after docking. Insert a short metal tungsten rod I4 with the same diameter as the concave hole in the concave hole on the lower surface, and insert a piece of metal tungsten rod I4 with a concave hole with the same diameter and size as the metal tungsten rod I4, and the outer diameter is slightly smaller than the crucible The inner diameter of the graphite gasket I5, the gap between the graphite gasket I5 and the inner wall of the graphite crucible 9 is 0.5-1.0 mm; the graphite gasket I5 and the lower surface of the graphite column III3 maintain a gap of 2-5 mm. Insert a long metal tungsten rod II6 with the same diameter as the concave hole on the upper surface of the graphite column to be impregnated with silver, insert a graphite gasket II7 with the same outer diameter as the graphite column, and make contact with the upper surface of the graphite column II2 to be impregnated with silver. A gap of 60-80mm is maintained between the graphite gasket II7 on the upper surface of the graphite column II2 and the
欲浸银石墨柱I1、石墨柱II2、石墨柱III3通过金属钨棒I4、石墨垫片I5、石墨坩埚底和金属钨棒II6、石墨坩埚盖8的支撑作用轴向被固定，又通过与金属钨棒I4连接的石墨垫片5、石墨垫片II7和石墨坩埚盖8的支撑作用径向被固定，使欲浸银石墨柱悬于石墨坩埚内。The graphite column I1, graphite column II2, and graphite column III3 to be impregnated with silver are axially fixed through the support of metal tungsten rod I4, graphite gasket I5, graphite crucible bottom, metal tungsten rod II6, and
浇铸银时，将装好的石墨坩埚装入真空感应炉内，坩埚上面放置装有金属银的另一坩埚。抽真空后加热，抽真空排气1小时，真空度为100-500Pa，熔融的金属银通过坩埚盖浇铸口11流入石墨坩埚9内，充满石墨柱周围空间，将石墨柱浸入熔融金属银内包覆起来，在1300℃恒温30分钟停炉，冷却后取出，浇铸出的金属银包覆石墨柱，银包套厚度均匀、完整。钨棒的支撑固定作用克服了熔融金属银对石墨柱产生的浮力，使石墨柱不飘浮起来；石墨垫片的径向定位作用使浸银石墨柱碰不到石墨坩埚壁。坩埚内的上部留有足量的金属银，以便下道工序热等静压时不让石墨柱暴露在银的外面。但是由于金属银的膨胀系数比石墨的膨胀系数大得多，浇铸冷却后石墨柱上表面与金属银的交界处会开裂，将石墨上表面暴露出来。因此，在石墨柱II2上表面盖上一片石墨垫片II7，将余量银与石墨柱II2隔开，石墨柱表面不再开裂。为了不使石墨垫片II7飘浮起来，通过石墨坩埚盖上面的小孔插入3～4根金属钨棒III10，顶在石墨垫片II7上。When casting silver, put the installed graphite crucible into the vacuum induction furnace, and place another crucible with metallic silver on the crucible. Heating after vacuuming, vacuuming and exhausting for 1 hour, the vacuum degree is 100-500Pa, the molten silver metal flows into the graphite crucible 9 through the
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8425817B2 (en) | 2010-05-06 | 2013-04-23 | Rolls-Royce Plc | Mould assembly |
| CN114699881A (en) * | 2022-03-10 | 2022-07-05 | 北京航化节能环保技术有限公司 | Self-cooling graphite quenching absorber and absorbing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1239284C (en) * | 2001-12-03 | 2006-02-01 | 北京有色金属研究总院 | Method for directly preparing TiNi shape memory alloy pipe joint from element powders |
| CN1803713A (en) * | 2006-01-16 | 2006-07-19 | 番禺得意精密电子工业有限公司 | Graphite product and method for making the same |
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2007
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8425817B2 (en) | 2010-05-06 | 2013-04-23 | Rolls-Royce Plc | Mould assembly |
| CN114699881A (en) * | 2022-03-10 | 2022-07-05 | 北京航化节能环保技术有限公司 | Self-cooling graphite quenching absorber and absorbing device |
| CN114699881B (en) * | 2022-03-10 | 2024-05-31 | 北京航化节能环保技术有限公司 | Self-cooling graphite quenching absorber and absorption device |
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| Publication number | Publication date |
|---|---|
| CN101450870B (en) | 2011-02-09 |
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