CN112605608A - Manufacturing method of composite centrifuge - Google Patents
Manufacturing method of composite centrifuge Download PDFInfo
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- CN112605608A CN112605608A CN202011218649.2A CN202011218649A CN112605608A CN 112605608 A CN112605608 A CN 112605608A CN 202011218649 A CN202011218649 A CN 202011218649A CN 112605608 A CN112605608 A CN 112605608A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
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Abstract
The invention discloses a manufacturing method of a composite material centrifuge. A manufacturing method of a composite material centrifuge comprises the following steps: the method comprises the steps of manufacturing a zirconium material → diffusion annealing → processing according to drawings → explosive cladding → grinding and cleaning before welding → covering of a zirconium plate → welding → diffusion annealing → assembling. The invention has good corrosion resistance and wear resistance and high cost performance.
Description
Technical Field
The invention relates to the field of centrifuge manufacturing, in particular to a manufacturing method of a composite centrifuge.
Background
The centrifugal machine is a device for realizing solid-liquid separation by utilizing centrifugal force, is widely used in the fields of pharmacy and chemical industry, and solid and liquid produced in the industries of pharmacy, chemical industry and the like often have stronger corrosivity, and solid particles in the solid and liquid cause more serious abrasion to materials, so that solid-liquid contact parts at the core part of the centrifugal machine are required to have higher corrosion resistance and abrasion resistance.
At present, a solid-liquid contact part at the core part of the centrifuge adopts a single-layer stainless steel material or a titanium material, wherein the stainless steel material is easy to corrode by acids and can be corroded by hydrochloric acid with the concentration of more than 7 percent, sulfuric acid with the concentration of more than 5 percent, nitric acid, aqua regia or dilute alkali solution at normal temperature; the performance of the titanium material excessively depends on the purity of the material, the purity of the titanium is not enough, the overall processing performance and the high-temperature resistance of the titanium material are poor, high-purity titanium is needed for achieving an ideal effect of the performance of the whole centrifuge, a large amount of titanium material is used for a solid-liquid contact part at the core part of the centrifuge to achieve good corrosion resistance and wear resistance, and the cost performance is low. Therefore, a new manufacturing method of a centrifuge is needed to solve the above problems.
Disclosure of the invention
The invention provides a manufacturing method of a composite centrifuge, which aims to solve the technical problems of poor corrosion resistance, poor wear resistance and low cost performance of the existing centrifuge.
In order to achieve the above object, the present invention provides a method for manufacturing a composite centrifuge, comprising the steps of:
step 1: manufacturing zirconium materials required by solid-liquid contact components of the scraper group, the cover group and the rotary drum, and performing diffusion annealing on the zirconium materials in a vacuum state, wherein the speed of temperature rise and cooling is not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, and the heat preservation temperature is not more than 200 ℃;
step 2: machining the zirconium material obtained in the step 1, and after machining is finished, performing diffusion annealing treatment on the zirconium material part in a vacuum state, wherein the heating and cooling speed is not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, and the heat preservation temperature is not more than 200 ℃;
and step 3: processing and manufacturing the discharge hopper, the outer shell, the bearing seat, the transmission component, the bottom plate, the floating platform and the shock absorber according to a drawing;
and 4, step 4: making a multilayer composite board required by a solid-liquid contact part of the cover group and the rotary drum, and performing explosive cladding on the stainless steel and the zirconium material obtained in the step 2 by adopting an explosive cladding process to form the multilayer composite board;
and 5: before welding, the position needing welding is polished and cleaned by cleaning fluid.
Step 6: welding the multilayer composite board obtained in the step 4 with other stainless steel parts, wherein the welding process adopts tungsten inert gas shielded welding, and the welding current is as follows: 10-150A; welding voltage: 5-10V, inert gas flow: 6-20L/min, welding speed: 5-10 cm/min;
and 7: after the welding in the step 6 is finished, covering the surface of the multilayer composite board by adopting a zirconium board;
and 8: carrying out riveting on the zirconium plate and the multilayer composite plate, welding after riveting, adopting tungsten inert gas shielded welding in the welding process, and welding current: 10-150A; welding voltage: 5-10V, inert gas flow: 6-20L/min, welding speed: 5-10 cm/min;
and step 9: after the welding in the step 8 is finished, diffusion annealing treatment is carried out on the whole in a vacuum state, the heating process and the cooling speed are not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, and the heat preservation temperature is not more than 200 ℃;
step 10: and (6) assembling the whole machine.
As a preferable technical scheme, after the welding position is polished in the step 5, the welding position is firstly cleaned by mixed liquid of 0.2-0.4% of nitric acid and 0.1-0.2% of potassium ferricyanide, and then cleaned by 0.3-0.5% of acetone.
As a preferred technical scheme, when the zirconium plate and the multilayer composite plate are welded in the step 8, a gap of 10-20cm is reserved and not welded, the reserved gap is welded after welding, and the welding position is polished.
Preferably, a titanium material is added between the stainless steel material and the zirconium material in step 4, and the three-layer composite plate is manufactured by performing explosion cladding on the stainless steel material, the titanium material and the zirconium material in sequence.
Preferably, the thickness of the titanium material is not more than 1 mm.
The invention has the beneficial effects that:
1) the zirconium material has extremely strong corrosion resistance at normal temperature and high temperature, and the wear resistance is very good, compared with stainless steel and titanium material, the corrosion resistance and the wear resistance of the zirconium material are the best, the scraper group belongs to the core component of the centrifuge, and the solid-liquid contact component of the scraper group is immersed in solid and liquid, so that the solid-liquid contact component of the scraper group has extremely high requirements on the corrosion resistance and the wear resistance, the whole scraper group is made of the zirconium material, the corrosion resistance and the wear resistance are greatly improved, the volume ratio of the solid-liquid contact component of the scraper group is small, and the cost performance of the scraper group made of the zirconium material is very high;
2) the cover group and the rotary drum in the centrifuge can partially contact solid and liquid, but the most part of the cover group and the rotary drum can not be immersed in the solid and liquid, the multilayer composite plate compounded by zirconium materials and stainless steel can improve the corrosion resistance and reduce the manufacturing cost, and the overall strength of the multilayer composite plate is better than that of stainless steel materials or titanium materials; the multilayer composite board adopts an explosive cladding manufacturing method, so that the connection effect of the zirconium material and the stainless steel material is improved, the overall physical performance is improved, and various performances of the manufactured multilayer composite board are obviously better than those of a multilayer board formed by common welding;
3) the solid-liquid contact components of the cover group and the rotary drum are multilayer composite plates formed by compounding zirconium materials and stainless steel materials, the corrosion resistance of a solid-liquid contact part can be enhanced on the basis of a traditional structure, and the corrosion resistance of the multilayer composite plates is obviously better than that of a single-layer solid-liquid contact component made of stainless steel materials or titanium materials; meanwhile, the multilayer composite board can ensure better corrosion resistance and better rigidity and wear resistance, can not cause over-high cost under the condition of improving various performances, and has cost performance obviously higher than that of stainless steel, zirconium or titanium;
4) before and after the zirconium material is processed and after the relevant parts of the zirconium material are welded, diffusion annealing in a vacuum state is carried out, the heating and cooling speed is not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, the heat preservation temperature is not more than 200 ℃, and in the state, the internal tissues of the zirconium material, the stainless steel material and the welded part are homogenized, the internal stress is eliminated, and the performance is improved.
Drawings
FIG. 1 shows a schematic diagram of the centrifuge of the present invention.
In the figure, 1 is a discharge hopper, 2 is a scraper group, 3 is a cover group, 4 is an outer shell, 5 is a rotary drum, 6 is a bearing seat, 7 is a transmission part, 8 is a bottom plate, 9 is a floating platform, 10 is a shock absorber
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
Referring to the drawings, the embodiment of the invention provides a manufacturing method of a composite centrifuge, which comprises the following steps:
step 1: the method comprises the steps of manufacturing a zirconium material required by solid-liquid contact components of a scraper group 2, a cover group 3 and a rotary drum 5, and performing diffusion annealing on the zirconium material in a vacuum state, wherein the heating and cooling speed is not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, the heat preservation temperature is not more than 200 ℃, the diffusion annealing in the vacuum state can homogenize the internal structure of the zirconium material, so that various performances of the zirconium material are improved, the heating and cooling speed is not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, the heat preservation temperature is not more than 200 ℃, the internal structure of the zirconium material is more uniform in the temperature range, and the stress eliminating effect of the method is better;
step 2: machining the zirconium material obtained in the step 1, and after the zirconium material is machined, performing diffusion annealing treatment on a zirconium material part in a vacuum state, wherein the heating and cooling speed is not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, the heat preservation temperature is not more than 200 ℃, and the internal structure of the zirconium material is changed due to the machining temperature, so that the internal part of the zirconium material can be uniformly refined by performing annealing once after machining, and good machining performance is kept;
and step 3: processing and manufacturing a discharge hopper 1, an outer shell 4, a bearing seat 6, a transmission part 7, a bottom plate 8, a floating platform 9 and a shock absorber 10 according to a drawing;
and 4, step 4: the multilayer composite board required by the solid-liquid contact component of the cover group 3 and the rotary drum 5 is manufactured, the stainless steel and the zirconium material are subjected to explosion cladding to form the multilayer composite board by adopting an explosion cladding process, the effect of connecting the zirconium material and the stainless steel material by utilizing the explosion cladding is best, the explosion cladding cannot generate negative influence on the zirconium material and the stainless steel material, one surface of the zirconium material after cladding is in contact with solid and liquid, and cannot be corroded by liquid such as strong acid and the like; preferably, a titanium material is added between the stainless steel material and the zirconium material in the step, the three-layer composite board is manufactured by explosion cladding according to the sequence of the stainless steel material, the titanium material and the zirconium material, further preferably, the thickness of the titanium material is not more than 1mm, the strength of the multilayer composite board can be further enhanced by adding the titanium material, the titanium material is connected with the stainless steel material and the zirconium material in the middle, the effect is better, the performance of the stainless steel material and the performance of the zirconium material can be better compatible, the damage to the overall performance due to too large difference of the performance of the stainless steel material and the performance of the zirconium material can be reduced, the thickness of the titanium material is not more than 1mm, the problem can be solved and the ideal effect can be achieved below 1 mm;
and 5: before welding, polishing the position to be welded, and cleaning with cleaning fluid;
step 6: welding the multilayer composite board obtained in the step 4 with other stainless steel parts, wherein the welding process adopts tungsten inert gas shielded welding, and the welding current is as follows: 10-150A; welding voltage: 5-10V, inert gas flow: 6-20L/min, welding speed: 5-10 cm/min;
and 7: after the welding in the step 6 is finished, the surfaces of the multilayer composite boards are covered by zirconium boards;
and 8: carrying out riveting on the zirconium plate and the multilayer composite plate, welding the zirconium plate and the multilayer composite plate by riveting, wherein the welding process adopts tungsten inert gas shielded welding, and welding current is as follows: 10-150A; welding voltage: 5-10V, inert gas flow: 6-20L/min, welding speed: 5-10cm/min, the zirconium plate and the multilayer composite plate are riveted, so that the overall strength is better, and the overall wear resistance can be improved by welding; the welding process can enable the welding effect of the zirconium material to be better, when the preferred riveted zirconium plate is welded with the zirconium plate on the composite plate, a gap of 10-20cm is reserved for non-welding during welding, the gap is used for exhausting gas during welding between the riveted zirconium plates, the reserved gap is welded after welding is finished, and the welding position is polished;
and step 9: after the welding in the step 8 is finished, performing diffusion annealing treatment on the whole in a vacuum state, wherein the heating process and the cooling speed are not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, the heat preservation temperature is not more than 200 ℃, and the diffusion annealing treatment in the vacuum state can enable the inner part of the welding seam of the zirconium material to be uniformly refined due to the fact that the residence time of the welding seam of the zirconium material and the heat affected zone at high temperature is increased and the cooling speed is slow, so that the effect is better when the temperature is not more than 200;
step 10: and (6) assembling the whole machine.
Example 1
A method of manufacturing a composite centrifuge, comprising the steps of:
step 1: manufacturing zirconium materials required by solid-liquid contact components of the scraper group 2, the cover group 3 and the rotary drum 5, and performing diffusion annealing on the zirconium materials in a vacuum state, wherein the heating and cooling speed is 1 ℃/1 minute, the heat preservation time is 24 hours, the heat preservation temperature is 200 ℃, the internal structure of the zirconium materials can be homogenized by the diffusion annealing in the vacuum state, various performances of the zirconium materials are improved, the heating and cooling speed is 1 ℃/1 minute, the heat preservation time is 24 hours, and the heat preservation temperature is 200 ℃;
step 2: machining the zirconium material obtained in the step 1, and after machining is completed, performing diffusion annealing treatment on the zirconium material part in a vacuum state, wherein the heating and cooling speed is 1 ℃/1 minute, the heat preservation time is 24 hours, and the heat preservation temperature is 200 ℃;
and step 3: processing and manufacturing a discharge hopper 1, an outer shell 4, a bearing seat 6, a transmission part 7, a bottom plate 8, a floating platform 9 and a shock absorber 10 according to a drawing;
and 4, step 4: manufacturing three-layer composite plates required by solid-liquid contact parts of a cover group 3 and a rotary drum 5, and performing explosion cladding on stainless steel, titanium and zirconium by adopting an explosion cladding process to form the three-layer composite plates, wherein the thickness of the titanium is 1 mm;
and 5: before welding, polishing the position to be welded, firstly cleaning the position to be welded by using a mixed solution of 0.2 percent of nitric acid and 0.1 percent of potassium ferricyanide, and then cleaning the position to be welded by using 0.3 percent of acetone;
step 6: welding the three-layer composite plate obtained in the step 4 with other stainless steel parts, wherein the welding process adopts tungsten inert gas shielded welding, and the welding current is as follows: 10A; welding voltage: 5V, inert gas flow: 6L/min, welding speed: 5 cm/min;
and 7: after the welding in the step 6 is finished, covering the surfaces of the three layers of composite plates by adopting zirconium plates;
and 8: the zirconium plate and the three-layer composite plate are riveted and then welded, the welding process adopts tungsten inert gas shielded welding, and the welding current is as follows: 10A; welding voltage: 5V, inert gas flow: 6L/min, welding speed: 5cm/min, reserving a gap of 10cm for non-welding when the riveted zirconium plate and the three-layer composite plate are welded, finishing welding the reserved gap after welding, and polishing the welding position;
and step 9: after the welding in the step 8 is finished, performing diffusion annealing treatment on the whole in a vacuum state, wherein the heating process and the cooling speed are 1 ℃/1 minute, the heat preservation time is 24 hours, and the heat preservation temperature is 200 ℃;
step 10: and (6) assembling the whole machine.
Example 2
A method of manufacturing a composite centrifuge, comprising the steps of:
step 1: manufacturing zirconium materials required by solid-liquid contact parts of the scraper group 2, the cover group 3 and the rotary drum 5, and performing diffusion annealing on the zirconium materials in a vacuum state, wherein the heating and cooling speed is 0.8 ℃/1 minute, the heat preservation time is 26 hours, the heat preservation temperature is 180 ℃, the internal structure of the zirconium materials can be homogenized by the diffusion annealing in the vacuum state, various performances of the zirconium materials are improved, the heating and cooling speed is 0.8 ℃/1 minute, the heat preservation time is 26 hours, and the heat preservation temperature is 180 ℃;
step 2: machining the zirconium material obtained in the step 1, and after machining is completed, performing diffusion annealing treatment on the zirconium material part in a vacuum state, wherein the heating and cooling speed is 0.8 ℃/1 minute, the heat preservation time is 26 hours, and the heat preservation temperature is 180 ℃;
and step 3: processing and manufacturing a discharge hopper 1, an outer shell 4, a bearing seat 6, a transmission part 7, a bottom plate 8, a floating platform 9 and a shock absorber 10 according to a drawing;
and 4, step 4: manufacturing three-layer composite plates required by solid-liquid contact parts of a cover group 3 and a rotary drum 5, and performing explosion cladding on stainless steel, titanium and zirconium by adopting an explosion cladding process to form the three-layer composite plates, wherein the thickness of the titanium is 0.8 mm;
and 5: before welding, polishing the position to be welded, firstly cleaning the position to be welded by using a mixed solution of 0.4 percent of nitric acid and 0.2 percent of potassium ferricyanide, and then cleaning the position to be welded by using 0.5 percent of acetone;
step 6: welding the three-layer composite plate obtained in the step 4 with other stainless steel parts, wherein the welding process adopts tungsten inert gas shielded welding, and the welding current is as follows: 150A; welding voltage: 10V, inert gas flow: 20L/min, welding speed: 10 cm/min;
and 7: after the welding in the step 6 is finished, covering the surfaces of the three layers of composite plates by adopting zirconium plates;
and 8: the zirconium plate and the three-layer composite plate are riveted and then welded, the welding process adopts tungsten inert gas shielded welding, and the welding current is as follows: 150A; welding voltage: 10V, inert gas flow: 20L/min, welding speed: 10cm/min, reserving a gap of 20cm for non-welding when the riveted zirconium plate and the three-layer composite plate are welded, finishing welding the reserved gap after welding, and polishing the welding position;
and step 9: after the welding in the step 8 is finished, performing diffusion annealing treatment on the whole in a vacuum state, wherein the heating process and the cooling speed are 0.8 ℃/1 minute, the heat preservation time is 26 hours, and the heat preservation temperature is 180 ℃;
step 10: and (6) assembling the whole machine.
Example 3
A method of manufacturing a composite centrifuge, comprising the steps of:
step 1: manufacturing zirconium materials required by solid-liquid contact components of the scraper group 2, the cover group 3 and the rotary drum 5, and performing diffusion annealing on the zirconium materials in a vacuum state, wherein the heating and cooling speed is 1 ℃/1 minute, the heat preservation time is 24 hours, the heat preservation temperature is 200 ℃, the internal structure of the zirconium materials can be homogenized by the diffusion annealing in the vacuum state, various performances of the zirconium materials are improved, the heating and cooling speed is 1 ℃/1 minute, the heat preservation time is 24 hours, and the heat preservation temperature is 200 ℃;
step 2: machining the zirconium material obtained in the step 1, and after machining is completed, performing diffusion annealing treatment on the zirconium material part in a vacuum state, wherein the heating and cooling speed is 1 ℃/1 minute, the heat preservation time is 24 hours, and the heat preservation temperature is 200 ℃;
and step 3: processing and manufacturing a discharge hopper 1, an outer shell 4, a bearing seat 6, a transmission part 7, a bottom plate 8, a floating platform 9 and a shock absorber 10 according to a drawing;
and 4, step 4: manufacturing three-layer composite plates required by solid-liquid contact parts of a cover group 3 and a rotary drum 5, and performing explosion cladding on stainless steel, titanium and zirconium by adopting an explosion cladding process to form the three-layer composite plates, wherein the thickness of the titanium is 0.9 mm;
and 5: before welding, polishing the position to be welded, firstly cleaning the position to be welded by using a mixed solution of 0.3 percent of nitric acid and 0.2 percent of potassium ferricyanide, and then cleaning the position to be welded by using 0.4 percent of acetone;
step 6: welding the three-layer composite plate obtained in the step 4 with other stainless steel parts, wherein the welding process adopts tungsten inert gas shielded welding, and the welding current is as follows: 10A; welding voltage: 5V, inert gas flow: 6L/min, welding speed: 5 cm/min;
and 7: after the welding in the step 6 is finished, covering the surfaces of the three layers of composite plates by adopting zirconium plates;
and 8: the zirconium plate and the three-layer composite plate are riveted and then welded, the welding process adopts tungsten inert gas shielded welding, and the welding current is as follows: 10A; welding voltage: 5V, inert gas flow: 6L/min, welding speed: 5cm/min, reserving a 15cm gap for non-welding when the riveted zirconium plate and the three-layer composite plate are welded, finishing welding the reserved gap after welding, and polishing the welding position;
and step 9: after the welding in the step 8 is finished, performing diffusion annealing treatment on the whole in a vacuum state, wherein the heating process and the cooling speed are 1 ℃/1 minute, the heat preservation time is 24 hours, and the heat preservation temperature is 200 ℃;
step 10: and (6) assembling the whole machine.
The foregoing examples are given solely for the purpose of illustrating the invention and are not to be construed as limiting the embodiments, and other variations and modifications in form thereof will be suggested to those skilled in the art upon reading the foregoing description, and it is not necessary or necessary to exhaustively enumerate all embodiments and all such obvious variations and modifications are deemed to be within the scope of the invention.
Claims (5)
1. A method of manufacturing a composite centrifuge, comprising the steps of:
step 1: manufacturing zirconium materials required by solid-liquid contact components of the scraper group (2), the cover group (3) and the rotary drum (5), and performing diffusion annealing on the zirconium materials in a vacuum state, wherein the heating and cooling speed is not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, and the heat preservation temperature is not more than 200 ℃;
step 2: machining the zirconium material obtained in the step 1, and after machining is finished, performing diffusion annealing treatment on the zirconium material part in a vacuum state, wherein the heating and cooling speed is not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, and the heat preservation temperature is not more than 200 ℃;
and step 3: machining according to a drawing to manufacture a discharge hopper (1), an outer shell (4), a bearing seat (6), a transmission component (7), a bottom plate (8), a floating platform (9) and a shock absorber (10);
and 4, step 4: making a multilayer composite board required by solid-liquid contact parts of a cover group (3) and a rotary drum (5), and performing explosion cladding on the stainless steel and the zirconium obtained in the step (2) by adopting an explosion cladding process to form the multilayer composite board;
and 5: before welding, the position needing welding is polished and cleaned by cleaning fluid.
Step 6: welding the multilayer composite board obtained in the step 4 with other stainless steel parts, wherein the welding process adopts tungsten inert gas shielded welding, and the welding current is as follows: 10-150A; welding voltage: 5-10V, inert gas flow: 6-20L/min, welding speed: 5-10 cm/min;
and 7: after the welding in the step 6 is finished, covering the surface of the multilayer composite board by adopting a zirconium board;
and 8: carrying out riveting on the zirconium plate and the multilayer composite plate, welding after riveting, adopting tungsten inert gas shielded welding in the welding process, and welding current: 10-150A; welding voltage: 5-10V, inert gas flow: 6-20L/min, welding speed: 5-10 cm/min;
and step 9: after the welding in the step 8 is finished, diffusion annealing treatment is carried out on the whole in a vacuum state, the heating process and the cooling speed are not more than 1 ℃/1 minute, the heat preservation time is not less than 24 hours, and the heat preservation temperature is not more than 200 ℃;
step 10: and (6) assembling the whole machine.
2. The method as claimed in claim 1, wherein the step 5 of polishing the welding site is followed by cleaning with a mixture of 0.2-0.4% nitric acid and 0.1-0.2% potassium ferricyanide, and then cleaning with 0.3-0.5% acetone.
3. The manufacturing method of the composite centrifuge as claimed in claim 1, wherein in the step 8, when the zirconium plate and the multilayer composite plate are welded, a gap of 10-20cm is reserved and not welded, after the welding is completed, the reserved gap is welded, and the welded part is polished.
4. The method for manufacturing a composite centrifuge according to claim 1, wherein a titanium material is added between the stainless steel material and the zirconium material in step 4, and the three-layer composite plate is manufactured by explosion cladding in the order of stainless steel material-titanium material-zirconium material.
5. The method of claim 4, wherein the titanium material has a thickness of no more than 1 mm.
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| CN101850641A (en) * | 2010-05-21 | 2010-10-06 | 西北有色金属研究院 | Preparation method for zirconium/steel metal composite board |
| CN103480504A (en) * | 2013-09-02 | 2014-01-01 | 张家港市永达机械制造有限公司 | Upper suspension type centrifugal machine |
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| CN104741880A (en) * | 2015-04-15 | 2015-07-01 | 西安天力金属复合材料有限公司 | Zirconium/steel composite board preparation method |
| CN105478707A (en) * | 2015-12-29 | 2016-04-13 | 四川华星炉管有限公司 | Method for producing conical section drum by using vertically centrifugal casting process |
| CN111356540A (en) * | 2017-09-15 | 2020-06-30 | 伊米尔技术有限公司 | Integrated water-based waste conversion system |
| CN107838545A (en) * | 2017-12-13 | 2018-03-27 | 安徽宝泰特种材料有限公司 | A kind of zirconium steel blast weldering composite plate special tooling |
| CN108410336A (en) * | 2018-03-02 | 2018-08-17 | 南京信息工程大学 | A kind of solder resist of water base aluminium alloy high-temperature process |
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