CN102212740B - VN/TiN-powder-containing high-chromium cast iron and preparation method thereof, and wear-resistant part - Google Patents
VN/TiN-powder-containing high-chromium cast iron and preparation method thereof, and wear-resistant part Download PDFInfo
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- CN102212740B CN102212740B CN201110137773A CN201110137773A CN102212740B CN 102212740 B CN102212740 B CN 102212740B CN 201110137773 A CN201110137773 A CN 201110137773A CN 201110137773 A CN201110137773 A CN 201110137773A CN 102212740 B CN102212740 B CN 102212740B
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Abstract
The invention discloses a VN/TiN-powder-containing high-chromium cast iron and a preparation method thereof, and a wear-resistant part. The technical scheme is as follows: the VN/TiN-powder-containing high-chromium cast iron is characterized in that the purity of the VN powder is 99.5%, and the purity of the TiN powder is 99.3%; the VN powder accounts for 2-4 wt% of the high-chromium cast iron, and the TiN powder accounts for 2-4 wt% of the high-chromium cast iron; and the high-chromium cast iron also comprises 3.1-3.9% of C, 18-22% of Cr, 0.5-1.0% of Si, 0.6-1.6% of Mo, 0.6-1.2% of Mn, 0.1-0.4% of Ni, 0.04-0.09% of V, 0.011-0.031% of S, 0.018-0.030% of P and the balance of iron as base material. The VN/TiN powder can be used as a high-chromium cast iron molten metal base and a nucleation core for solidifying carbides, thereby enhancing the wear resistance of the castings; the VN/TiN powder is utilized to reinforce the high-chromium cast iron material, so that wear-resistant shot blasting device blades made of the high-impact-resistant frictional-wear-resistant high-chromium cast iron can be formed; and since the VN/TiN powder is added by an in-furnace addition method, the nanoparticles are added to perform a strengthening effect, and argon gas added into the furnace protects the molten metal.
Description
Technical field
The present invention relates to a kind of cast iron materials, especially relate to a kind of VN of containing, TiN powder rich chromium cast iron, this cast iron Preparation Method and make the method for wearing piece with this kind cast iron materials.
Background technology
In the prior art, rich chromium cast iron has good wear resisting property, therefore, as the shot-blasting machine upper-part that wear resistance is had relatively high expectations, all adopts high chromium cast iron material to be processed into.But in use there is following disadvantage in this kind rich chromium cast iron: bear frictional wear especially under impact frictional wear situation at it, foundry goods is prone to the phenomenon that peel off layer by layer on the surface, thereby causes the foundry goods wear out failure.
Summary of the invention
The objective of the invention is to overcome the defective that exists in the prior art, the method that provides a kind of rich chromium cast iron, this rich chromium cast iron preparation method and this cast iron to make wearing piece, it is nano level VN that this scheme adopts granularity, the TiN powder is used for changing M
7C
3The pattern of carbide, thereby the wear resistance of enhancing rich chromium cast iron, the technical scheme of employing is: a kind of VN of containing, TiN powder rich chromium cast iron; It is characterized in that: said VN, TiN powder are that purity is that 99.5% VN and purity are the TiN of 99.3 %, and it is the VN of 2-4% and the TiN of 2-4% that said powder accounts for the rich chromium cast iron weight percentage, and said rich chromium cast iron also comprises 3.1-3.9%C; 18-22%Cr, 0.5-1.0%Si, 0.6-1.6%Mo; 0.6-1.2%Mn, 0.1-0.4%Ni, 0.04-0.09%V; 0.011-0.031%S, 0.018-0.030%P, surplus are the body material of iron.
Technical scheme of the present invention also has: said VN, TiN powder mean particle size are the 20-40 nanometer.
Technical scheme of the present invention also has: said preparation method may further comprise the steps:
1) with medium-frequency induction furnace said body material is carried out melting, smelting temperature is 1440-1550 ℃, obtains matrix metal liquid;
2) in the fusion process with the carburetting of graphite carburelant, glass collection slag slagging-off;
3) pour pouring method in said VN, the TiN powder employing stove, obtain the rich chromium cast iron liquation;
4) with said rich chromium cast iron liquation cast after coagulation, obtain the said VN of containing, TiN powder rich chromium cast iron.
Technical scheme of the present invention also has: the preparation method of said wearing piece comprises the steps:
1) with medium-frequency induction furnace said body material is carried out melting, smelting temperature is 1440-1550 ℃;
2) skim in the fusion process, deoxidation, the carburetting of graphite carburelant is adopted in refining, the slagging-off of glass collection slag;
3) under argon gas is carried, said VN, TiN powder are poured in the bag, it is 0.25MPa that argon gas pours pressure, and powder flow is 1.5g/min, inflates after 2-3 minute, leaves standstill 2 minutes, obtains the rich chromium cast iron liquation, waiting for pouring;
4) said rich chromium cast iron liquation is poured in the metal mold casting mold, teeming temperature is 1340-1450 ℃, pours into a mould postcooling to 150-200 ℃, broken shell, and cool to room temperature obtains foundry goods;
5) with said foundry goods through the excision cast gate after, put into shot-blasting machine and carry out impeller blasting;
6) insulation was taken out air cooling to room temperature after 30 minutes after the foundry goods after will clearing up was heated to 920-960 ℃ in box heat treatment furnace;
7) foundry goods after the cleaning in the step 6) is reheated 220-260 ℃ after air cooling to room temperature, carry out low-temperaturetempering and handle, accomplish the processing of wearing piece.
Technical scheme of the present invention also has: said wearing piece is the shot-blasting machine blade.
Technical scheme of the present invention also has: said blade will can use after the compensation through dynamic balancing measurement.
Beneficial effect of the present invention is: 1) VN and TiN powder can be used as the forming core core that rich chromium cast iron molten metal matrix and carbide solidify; Suppressing crystalline grows up; Obtain evenly tiny equi-axed crystal; Can change the growth morphology of carbide, control the direction of growth of carbide, thereby improve the wear resistance of foundry goods greatly.
2) utilize VN and TiN powder to strengthen high chromium cast iron material, can form the wear-resisting impeller head blade of anti-HI high impact frictional wear rich chromium cast iron.Therefore, utilize VN and TiN nano-powder both can change rich chromium cast iron crystal growth pattern, change martensitic growthhabit, improve the hardness of material greatly; Can improve the friction and wear behavior under the material at high temperature again, obviously play the effect of opposing high temperature friction and wear.General using VN and TiN powder strengthen the blade of rich chromium cast iron, and its friction resistant polishing machine can reach 10 times of common rich chromium cast iron blade.
3) VN and TiN powder adopt addition method in the stove, and the nano particle that adds has on the one hand played strengthening effect, and what in stove, add on the other hand is argon gas; Protected molten metal; The gas-entrained impurity of emersion is run out of outside the molten metal in the adition process, makes molten metal obtain the purified effect, the impeller head blade strength that utilizes this molten metal to make; Comprehensive mechanical property such as toughness and hardness index is good, and resistance to abrasion improves greatly.
Embodiment
Specify in the face of the present invention down.The invention discloses a kind of VN, TiN powder rich chromium cast iron, in this kind rich chromium cast iron, powder is arranged, powder is that purity is that 99.5% VN and purity are the TiN of 99.3 %, and it is the VN of 2-4% and the TiN of 2-4% that powder accounts for the rich chromium cast iron weight percentage; This rich chromium cast iron also comprises 3.1-3.9%C, 18-22%Cr, 0.5-1.0%Si; 0.6-1.6%Mo, 0.6-1.2%Mn, 0.1-0.4%Ni; 0.04-0.09%V, 0.011-0.031%S, 0.018-0.030%P, surplus are the body material of iron.Used powder mean particle size is the 20-40 nanometer.
The preparation method of this high chromium cast iron material is: the preparation method may further comprise the steps:
1) with medium-frequency induction furnace said body material is carried out melting, smelting temperature is 1440-1550 ℃, obtains matrix metal liquid, and this electric furnace is 250 kg medium-frequency induction furnaces;
2) in the fusion process with the carburetting of graphite carburelant, glass collection slag slagging-off;
3) pour pouring method in VN, the TiN powder employing stove, obtain the rich chromium cast iron liquation;
4) with said rich chromium cast iron liquation cast after coagulation, obtain the said VN of containing, TiN powder rich chromium cast iron.
The wearing piece that adopts this rich chromium cast iron to process, wearing piece is the preparation method comprise the steps:
1) with medium-frequency induction furnace body material is carried out melting, smelting temperature is 1440-1550 ℃;
2) skim in the fusion process, deoxidation, the carburetting of graphite carburelant is adopted in refining, the slagging-off of glass collection slag;
3) under argon gas is carried, said VN, TiN powder are poured in the bag, it is 0.25MPa that argon gas pours pressure, and powder flow is 1.5g/min, inflates after 2-3 minute, leaves standstill 2 minutes, obtains the rich chromium cast iron liquation, waiting for pouring;
4) the rich chromium cast iron liquation is poured in the metal mold casting mold, teeming temperature is 1340-1450 ℃, pours into a mould postcooling to 150-200 ℃, broken shell, and cool to room temperature obtains foundry goods;
5) with foundry goods through the excision cast gate after, put into shot-blasting machine and carry out impeller blasting, used shot-blasting machine is the Q326 shot-blasting machine;
6) insulation was taken out air cooling to room temperature after 30 minutes after the foundry goods after will clearing up was heated to 920-960 ℃ in box heat treatment furnace;
7) foundry goods after the cleaning in the step 6) is reheated 220-260 ℃ after air cooling to room temperature, carry out low-temperaturetempering and handle, accomplish the processing of wearing piece.
Can adopt this kind method to accomplish the processing of wearing piece on the shot-blasting machine, can be parts such as shot wheel, blade, when making the shot-blasting machine blade, blade will can use after the compensation through dynamic balancing measurement.
Certainly, above-mentioned explanation is not a limitation of the present invention, and the present invention also is not limited only to above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also belong to protection scope of the present invention.
Claims (4)
1. preparation method who contains VN, TiN powder high chromium cast iron material, said VN, TiN powder are that purity is that 99.5% VN and purity are the TiN of 99.3 %, it is the VN of 2-4% and the TiN of 2-4% that said powder accounts for the rich chromium cast iron weight percentage; Said rich chromium cast iron also comprises 3.1-3.9%C, 18-22%Cr, 0.5-1.0%Si; 0.6-1.6%Mo, 0.6-1.2%Mn, 0.1-0.4%Ni; 0.04-0.09%V; 0.011-0.031%S, 0.018-0.030%P, surplus are the body material of iron, it is characterized in that: said preparation method may further comprise the steps:
1) with medium-frequency induction furnace said body material is carried out melting, smelting temperature is 1440-1550 ℃, obtains matrix metal liquid;
2) in the fusion process with the carburetting of graphite carburelant, glass collection slag slagging-off;
3) pour pouring method in said VN, the TiN powder employing stove, obtain the rich chromium cast iron liquation;
4) with said rich chromium cast iron liquation cast after coagulation, obtain the said VN of containing, TiN powder rich chromium cast iron.
2. wearing piece that contains VN, TiN powder rich chromium cast iron, said VN, TiN powder are that purity is that 99.5% VN and purity are the TiN of 99.3 %, and it is the VN of 2-4% and the TiN of 2-4% that said powder accounts for the rich chromium cast iron weight percentage; Said rich chromium cast iron also comprises 3.1-3.9%C, 18-22%Cr, 0.5-1.0%Si; 0.6-1.6%Mo, 0.6-1.2%Mn, 0.1-0.4%Ni; 0.04-0.09%V; 0.011-0.031%S, 0.018-0.030%P, surplus are the body material of iron, it is characterized in that: the preparation method of said wearing piece comprises the steps:
1) with medium-frequency induction furnace said body material is carried out melting, smelting temperature is 1440-1550 ℃;
2) skim in the fusion process, deoxidation, the carburetting of graphite carburelant is adopted in refining, the slagging-off of glass collection slag;
3) under argon gas is carried, said VN, TiN powder are poured in the bag, it is 0.25MPa that argon gas pours pressure, and powder flow is 1.5g/min, inflates after 2-3 minute, leaves standstill 2 minutes, obtains the rich chromium cast iron liquation, waiting for pouring;
4) said rich chromium cast iron liquation is poured in the metal mold casting mold, teeming temperature is 1340-1450 ℃, pours into a mould postcooling to 150-200 ℃, broken shell, and cool to room temperature obtains foundry goods;
5) with said foundry goods through the excision cast gate after, put into shot-blasting machine and carry out impeller blasting;
6) insulation was taken out air cooling to room temperature after 30 minutes after the foundry goods after will clearing up was heated to 920-960 ℃ in box heat treatment furnace;
7) foundry goods after the cleaning in the step 6) is reheated 220-260 ℃ after air cooling to room temperature, carry out low-temperaturetempering and handle, accomplish the processing of wearing piece.
3. according to the wearing piece of the said rich chromium cast iron of claim 2, it is characterized in that: said wearing piece is the shot-blasting machine blade.
4. according to the wearing piece of the said rich chromium cast iron of claim 3, it is characterized in that: said blade will can use after the compensation through dynamic balancing measurement.
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| CN201110137773A CN102212740B (en) | 2011-05-26 | 2011-05-26 | VN/TiN-powder-containing high-chromium cast iron and preparation method thereof, and wear-resistant part |
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| CN201110137773A CN102212740B (en) | 2011-05-26 | 2011-05-26 | VN/TiN-powder-containing high-chromium cast iron and preparation method thereof, and wear-resistant part |
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| CN102212740B true CN102212740B (en) | 2012-10-03 |
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| CN102814491B (en) * | 2012-09-09 | 2013-06-12 | 吉林大学 | High-strength gray cast iron enhancer and strengthening treatment process thereof |
| CN103817607B (en) * | 2014-02-26 | 2016-01-20 | 江苏久联冶金机械制造有限公司 | A kind of preparation method of wear-resisting shot blast machine blade |
| CN107739969A (en) * | 2017-09-30 | 2018-02-27 | 南京赛达机械制造有限公司 | A kind of antifouling titanium alloy turbine blade and preparation method thereof |
| CN111101077B (en) * | 2018-10-26 | 2021-08-17 | 宝山钢铁股份有限公司 | Low-cost high-wear-resistance stretch reducing roller and heat treatment process thereof |
| US20240052462A1 (en) * | 2021-01-12 | 2024-02-15 | Weir Minerals Australia Ltd | Primary Carbide Refinement In Hypereutectic High Chromium Cast Irons |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4870931A (en) * | 1987-05-30 | 1989-10-03 | Nippon Piston Ring Co., Ltd. | Rocker arm having wear resistant scuffing resistant portion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07316754A (en) * | 1994-05-25 | 1995-12-05 | Riken Corp | Alloy used for cam lobe for insert-casting cam shaft and cam lobe using the same |
| CN100560743C (en) * | 2006-12-07 | 2009-11-18 | 首钢总公司 | The method of producing ultra-low phosphoretic steel by molten steel dephosphorising outside furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4870931A (en) * | 1987-05-30 | 1989-10-03 | Nippon Piston Ring Co., Ltd. | Rocker arm having wear resistant scuffing resistant portion |
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| JP特开平7-316754A 1995.12.05 |
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Owner name: SHANDONG KAITAI ABRATOR MACHINERY CO., LTD. Free format text: FORMER NAME: SHANDONG KAITAI SHOT-BLASTING MACHINERY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 256217 Zouping City, Shandong province Qingyang town resident Patentee after: Safe ball blast machinery incorporated company is opened in Shandong Address before: 256217 Zouping City, Shandong province Qingyang town resident Patentee before: Shandong Kaitai Shot-Blasting Machinery Co., Ltd. |