CN110923560A - Impeller material for enhancing corrosion resistance and preparation method thereof - Google Patents
Impeller material for enhancing corrosion resistance and preparation method thereof Download PDFInfo
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- CN110923560A CN110923560A CN201911311680.8A CN201911311680A CN110923560A CN 110923560 A CN110923560 A CN 110923560A CN 201911311680 A CN201911311680 A CN 201911311680A CN 110923560 A CN110923560 A CN 110923560A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses an impeller material for enhancing corrosion resistance, which comprises the following components in percentage by mass: the composition comprises the following components in percentage by mass: 5-7.5% of magnesium nitride, 3.2-4.3% of W, 0.47-0.52% of Mn, 0.7-0.92% of Sn0.03-0.05% of Nb, 15-20% of copper-plated graphite powder, 1-10% of magnesium oxide and the balance of Fe, wherein the sum of the percentages of the above components is 100%. According to the impeller material, the copper-plated graphite powder and the magnesium oxide are added to form a layer of plate protective film, so that the surface structure is not damaged while the impeller material is wear-resistant, the integrity of the surface structure is improved, the corrosion is slowed down, and the cost is low; when the inner core material is prepared, the temperature is rapidly increased, the transformation of the internal phase change can be accelerated, the inner core body and the external melting layer are combined, the temperature increasing speed is reduced, the inner core body and the external melting layer can be completely combined, and the steps are simple.
Description
Technical Field
The invention belongs to the technical field of impeller materials and preparation methods thereof, and particularly relates to an impeller material for enhancing corrosion resistance.
Background
The impeller is a disk provided with moving blades, is a component of an impulse turbine rotor, and can also be a general term for the disk and the rotating blades mounted thereon, and the impeller can be classified according to the shape and the opening and closing conditions. The impeller mainly has the following four forms: (a) closing; (b) the front half-open type; (c) the back half is opened; (d) is open.
The wear of the impeller is related to factors such as the composition, particle size, concentration, shape, impact velocity, angle of impact, chemical composition, properties of the gas, temperature and humidity of the abrasive. The non-uniformity of the gas flow inside the impeller accelerates wear. As a measure for preventing wear of the impeller: firstly, dust and corrosive gas entering a fan are reduced, and therefore a fan operation system must be modified; and secondly, the local abrasion tends to be uniform, namely the abrasion resistance of the impeller needs to be improved. The wear resistance of the impeller can be improved by adopting a material with high hardness and good wear resistance, so that the impeller manufacturing process is difficult, and the impeller is not reasonable from the economic point of view.
Disclosure of Invention
The invention aims to provide an impeller material for enhancing the corrosion resistance, and solves the problems of poor corrosion resistance and high cost of the existing impeller material.
Another object of the present invention is to provide a method for preparing an impeller material with enhanced anti-corrosive properties.
The impeller material for enhancing the corrosion resistance comprises the following components in parts by mass: the composition comprises the following components in percentage by mass: 5 to 7.5 percent of magnesium nitride, 3.2 to 4.3 percent of W, 0.47 to 0.52 percent of Mn, 0.7 to 0.92 percent of Sn, 0.03 to 0.05 percent of niobium, 15 to 20 percent of copper-plated graphite powder and 1 to 10 percent of magnesium oxide; the balance of iron, and the sum of the percentages of the components is 100 percent.
The invention adopts another technical scheme that the preparation method of the impeller material for enhancing the corrosion resistance comprises the following steps:
step 1, weighing raw materials according to the mass fractions of the following components, and specifically comprising the following components: 5 to 7.5 percent of magnesium nitride, 3.2 to 4.3 percent of W, 0.47 to 0.52 percent of Mn, 0.7 to 0.92 percent of Sn, 0.03 to 0.05 percent of niobium, 15 to 20 percent of copper-plated graphite powder and 1 to 10 percent of magnesium oxide; the balance of iron, and the sum of the percentages of the components is 100 percent;
step 2, placing the W, Mn, Sn, niobium and iron in the step 1 in a stirrer for stirring uniformly, then transferring the mixture into a vacuum heating furnace for heating and heat preservation, and cooling the furnace to normal temperature to obtain a primary blank for later use;
step 3, uniformly mixing the magnesium nitride, the magnesium oxide and the copper-plated graphite powder in the step 1 in a stirrer, and simultaneously heating and melting the mixture in a crucible to obtain surface treatment molten liquid;
and 4, completely pouring the surface treatment molten liquid in the step 3 on the surface of the primary blank in the step 2, then placing the primary blank in a vacuum melting furnace for heating and roasting, and cooling the furnace to obtain the required material.
The present invention is also characterized in that,
the heating and heat preservation parameters in the step 2 are as follows: the temperature rise is 800-850 ℃, the heat preservation time is 60-75 min, and the temperature rise rate is 2-6 ℃/min.
The parameters of heating and melting in the step 3 are as follows: the heating temperature is 240-500 ℃.
The parameters of heating and roasting in the step 4 are as follows: the temperature rise is 680-720 ℃, and the temperature rise rate is 2-4 ℃/min.
The invention has the beneficial effects that: according to the impeller material for enhancing the corrosion resistance, the copper-plated graphite powder and the magnesium oxide are added to form a layer of plate protective film, so that the surface structure is not damaged while the impeller material is wear-resistant, the integrity of the surface structure is improved, the corrosion is slowed down, and the cost is low;
the preparation method of the impeller material disclosed by the invention has the advantages that when the inner core material is prepared, the temperature is quickly increased, the conversion of internal phase change can be accelerated, the temperature increase speed is reduced by compounding the inner core body and the outer melting layer, so that the inner core body and the outer melting layer can be completely combined, the steps are simple, and the practical value is very good.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments.
The invention relates to an impeller material for enhancing the corrosion resistance, which comprises the following components in percentage by mass: the composition comprises the following components in percentage by mass: 5 to 7.5 percent of magnesium nitride, 3.2 to 4.3 percent of W, 0.47 to 0.52 percent of Mn, 0.7 to 0.92 percent of Sn, 0.03 to 0.05 percent of niobium, 15 to 20 percent of copper-plated graphite powder and 1 to 10 percent of magnesium oxide; the balance of iron, and the sum of the percentages of the components is 100 percent.
Example 1
Step 1, weighing raw materials according to the mass fractions of the following components, and specifically comprising the following components: 5% of magnesium nitride, 3.2% of W, 0.47% of Mn, 0.7% of Sn, 0.03% of niobium, 15% of copper-plated graphite powder and 1% of magnesium oxide; the balance of iron, and the sum of the percentages of the components is 100 percent;
step 2, placing the W, Mn, Sn, niobium and iron in the step 1 in a stirrer for stirring uniformly, then transferring the mixture into a vacuum heating furnace for heating and heat preservation, and cooling the furnace to normal temperature to obtain a primary blank for later use;
the heating and heat preservation parameters are as follows: the temperature rise is 800 ℃, the heat preservation time is 75min, and the temperature rise rate is 6 ℃/min;
step 3, uniformly mixing the magnesium nitride, the magnesium oxide and the copper-plated graphite powder in the step 1 in a stirrer, and simultaneously heating and melting the mixture in a crucible to obtain surface treatment molten liquid;
the parameters of heating and melting are as follows: the heating temperature is 240 ℃;
and 4, completely pouring the surface treatment molten liquid in the step 3 on the surface of the primary blank in the step 2, then placing the primary blank in a vacuum melting furnace for heating and roasting, and cooling the furnace to obtain the required material.
The parameters of heating and roasting are as follows: the temperature rise was 680 ℃ and the rate of temperature rise was 4 ℃/min.
Example 2
Step 1, weighing raw materials according to the mass fractions of the following components, and specifically comprising the following components: 7.5 percent of magnesium nitride, 4.3 percent of W, 0.52 percent of Mn, 0.92 percent of Sn, 0.05 percent of niobium, 20 percent of copper-plated graphite powder and 10 percent of magnesium oxide; the balance of iron, and the sum of the percentages of the components is 100 percent;
step 2, placing the W, Mn, Sn, niobium and iron in the step 1 in a stirrer for stirring uniformly, then transferring the mixture into a vacuum heating furnace for heating and heat preservation, and cooling the furnace to normal temperature to obtain a primary blank for later use;
the heating and heat preservation parameters are as follows: the temperature rise is 850 ℃, the heat preservation time is 60min, and the temperature rise rate is 6 ℃/min;
step 3, uniformly mixing the magnesium nitride, the magnesium oxide and the copper-plated graphite powder in the step 1 in a stirrer, and simultaneously heating and melting the mixture in a crucible to obtain surface treatment molten liquid;
the parameters of heating and melting are as follows: the heating temperature is 500 ℃;
and 4, completely pouring the surface treatment molten liquid in the step 3 on the surface of the primary blank in the step 2, then placing the primary blank in a vacuum melting furnace for heating and roasting, and cooling the furnace to obtain the required material.
The parameters of heating and roasting are as follows: the temperature rise was 720 ℃ and the rate of temperature rise was 2 ℃/min.
Example 3
Step 1, weighing raw materials according to the mass fractions of the following components, and specifically comprising the following components: 6.2 percent of magnesium nitride, 36 percent of W, 0.50 percent of Mn, 0.82 percent of Sn, 0.04 percent of niobium, 18 percent of copper-plated graphite powder and 8 percent of magnesium oxide; the balance of iron, and the sum of the percentages of the components is 100 percent;
step 2, placing the W, Mn, Sn, niobium and iron in the step 1 in a stirrer for stirring uniformly, then transferring the mixture into a vacuum heating furnace for heating and heat preservation, and cooling the furnace to normal temperature to obtain a primary blank for later use;
the heating and heat preservation parameters are as follows: the temperature rise is 820 ℃, the heat preservation time is 65min, and the temperature rise rate is 4 ℃/min;
step 3, uniformly mixing the magnesium nitride, the magnesium oxide and the copper-plated graphite powder in the step 1 in a stirrer, and simultaneously heating and melting the mixture in a crucible to obtain surface treatment molten liquid;
the parameters of heating and melting are as follows: the heating temperature is 280 ℃;
and 4, completely pouring the surface treatment molten liquid in the step 3 on the surface of the primary blank in the step 2, then placing the primary blank in a vacuum melting furnace for heating and roasting, and cooling the furnace to obtain the required material.
The parameters of heating and roasting are as follows: the temperature rise was 700 ℃ and the rate of temperature rise was 3 ℃/min.
The impeller material prepared by the above embodiments 1-3 forms a layer of plate protective film by adding copper-plated graphite powder and magnesium oxide, and does not damage the surface skin structure while being wear-resistant, thereby increasing the integrity of the surface structure, slowing down the corrosion action, and having low cost; when an internal core material, namely an initial blank, is prepared, the temperature is rapidly increased, the conversion of internal phase change can be accelerated, the temperature increasing speed is reduced in a combined type of the internal core body and an external melting layer, the two can be completely combined, the steps are simple, and the method has good practical value.
Claims (5)
1. The impeller material for enhancing the corrosion resistance is characterized by comprising the following components in parts by mass: 5 to 7.5 percent of magnesium nitride, 3.2 to 4.3 percent of W, 0.47 to 0.52 percent of Mn, 0.7 to 0.92 percent of Sn, 0.03 to 0.05 percent of niobium, 15 to 20 percent of copper-plated graphite powder and 1 to 10 percent of magnesium oxide; the balance of iron, and the sum of the percentages of the components is 100 percent.
2. The method for preparing the impeller material with the enhanced anti-corrosion performance according to claim 1, which comprises the following steps:
step 1, weighing raw materials according to the mass fractions of the following components, and specifically comprising the following components: 5 to 7.5 percent of magnesium nitride, 3.2 to 4.3 percent of W, 0.47 to 0.52 percent of Mn, 0.7 to 0.92 percent of Sn, 0.03 to 0.05 percent of niobium, 15 to 20 percent of copper-plated graphite powder and 1 to 10 percent of magnesium oxide; the balance of iron, and the sum of the percentages of the components is 100 percent;
step 2, placing the W, Mn, Sn, niobium and iron in the step 1 in a stirrer for stirring uniformly, then transferring the mixture into a vacuum heating furnace for heating and heat preservation, and cooling the furnace to normal temperature to obtain a primary blank for later use;
step 3, uniformly mixing the magnesium nitride, the magnesium oxide and the copper-plated graphite powder in the step 1 in a stirrer, and simultaneously heating and melting the mixture in a crucible to obtain surface treatment molten liquid;
and 4, completely pouring the surface treatment molten liquid in the step 3 on the surface of the primary blank in the step 2, then placing the primary blank in a vacuum melting furnace for heating and roasting, and cooling the furnace to obtain the required material.
3. The preparation method of the impeller material with the enhanced anti-corrosion performance according to claim 2, wherein the heating and heat preservation parameters in the step 2 are as follows: the temperature rise is 800-850 ℃, the heat preservation time is 60-75 min, and the temperature rise rate is 2-6 ℃/min.
4. The method for preparing the impeller material with the enhanced anti-corrosion performance according to the claim 3, wherein the parameters of the heating and melting in the step 3 are as follows: the heating temperature is 240-500 ℃.
5. The preparation method of the impeller material with the enhanced corrosion resistance, which is claimed in claim 4, is characterized in that the parameters of the heating roasting in the step 4 are as follows: the temperature rise is 680-720 ℃, and the temperature rise rate is 2-4 ℃/min.
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| CN201911311680.8A CN110923560A (en) | 2019-12-18 | 2019-12-18 | Impeller material for enhancing corrosion resistance and preparation method thereof |
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| CN201911311680.8A CN110923560A (en) | 2019-12-18 | 2019-12-18 | Impeller material for enhancing corrosion resistance and preparation method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3902823A (en) * | 1972-04-24 | 1975-09-02 | Hitachi Ltd | Impeller for gas-handling apparatus |
| JP2004167595A (en) * | 2002-11-22 | 2004-06-17 | Hirotoshi Baba | Impeller and method of machining the same |
| CN101163808A (en) * | 2005-04-18 | 2008-04-16 | 住友金属工业株式会社 | Low alloy steel |
| JP2011127203A (en) * | 2009-12-21 | 2011-06-30 | Mitsubishi Heavy Ind Ltd | Method for manufacturing impeller material |
| CN107574390A (en) * | 2016-07-04 | 2018-01-12 | 遵义拓特铸锻有限公司 | A kind of phosphoric acid material pulp pump stainless steel impeller and preparation method thereof |
| CN110042326A (en) * | 2019-05-21 | 2019-07-23 | 马鞍山市庄芝耐磨合金有限公司 | A kind of centrifugal casting agitator arm and method |
| CN110578087A (en) * | 2019-08-23 | 2019-12-17 | 徐州东坤耐磨材料有限公司 | impeller for impeller pump |
-
2019
- 2019-12-18 CN CN201911311680.8A patent/CN110923560A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3902823A (en) * | 1972-04-24 | 1975-09-02 | Hitachi Ltd | Impeller for gas-handling apparatus |
| JP2004167595A (en) * | 2002-11-22 | 2004-06-17 | Hirotoshi Baba | Impeller and method of machining the same |
| CN101163808A (en) * | 2005-04-18 | 2008-04-16 | 住友金属工业株式会社 | Low alloy steel |
| JP2011127203A (en) * | 2009-12-21 | 2011-06-30 | Mitsubishi Heavy Ind Ltd | Method for manufacturing impeller material |
| CN107574390A (en) * | 2016-07-04 | 2018-01-12 | 遵义拓特铸锻有限公司 | A kind of phosphoric acid material pulp pump stainless steel impeller and preparation method thereof |
| CN110042326A (en) * | 2019-05-21 | 2019-07-23 | 马鞍山市庄芝耐磨合金有限公司 | A kind of centrifugal casting agitator arm and method |
| CN110578087A (en) * | 2019-08-23 | 2019-12-17 | 徐州东坤耐磨材料有限公司 | impeller for impeller pump |
Non-Patent Citations (2)
| Title |
|---|
| 朱洪法: "《催化剂手册》", 31 August 2008, 金盾出版社 * |
| 翁润生: "《工业岩石学》", 31 October 1990, 中国地质大学出版社 * |
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