CN102168228A - Medical precipitation-hardening stainless steel material and preparation method thereof - Google Patents
Medical precipitation-hardening stainless steel material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a medical precipitation-hardening stainless steel material and a preparation method thereof. The medical precipitation-hardening stainless steel material comprises the following chemical components in percentage by weight: less than or equal to 0.03 percent of carbon C, 12 to 14 percent of chromium Cr, 6 to 8 percent of nickel Ni, 2 to 4 percent of molybdenum Mo, less than or equal to 2 percent of copper Cu, 0.8 to 1.2 percent of aluminum Al, 0.5 to 0.8 percent of titanium Ti, less than or equal to 0.6 percent of silicon Si, less than or equal to 0.6 percent of manganese Mn, less than or equal to 0.03 percent of sulfur S, less than or equal to 0.035 percent of phosphorus P and the balance of ferrum Fe. The preparation method comprises the following steps of: (1) mixing according to the weight percentage of the chemical components, smelting and casting steel ingots; (2) heating the steel ingots to the temperature of between 1,050 and 1,200 DEG C, and cogging by forging or forging directly to form forge pieces with simple shapes; (3) heating forging stocks to the temperature of between 1,050 and 1,200 DEG C, performing hot rolling to form bars and plates, and performing air cooling to the room temperature; (4) machining mechanically to manufacture medical equipment parts; and (5) aging the medical equipment parts at the temperature of between 400 and 500 DEG C under vacuum. The stainless steel material has the characteristics of no toxicity, high strength, corrosion resistance, rush resistance, weldability and high rigidity.
Description
Technical field
The present invention relates to a kind of medical stainless steel material, relate in particular to a kind of medical PH Stainless Steel material and preparation method thereof, belong to medicine equipment material technology field.
Background technology
In medical instruments field, for the material and the product that under high-temperature steam sterilization and the environment that contacts blood, body fluid, physiological saline, use, have particular requirement aspect mechanical property and the solidity to corrosion, requiring not burn into non-corrosive, intensity height, hardness height, anti-fight, counter-bending, antitorque commentaries on classics, sharp, the continuous sword of cutting edge, not turned.
At present, domestic existing Cr13, martensite type stainless steels such as 9Cr18, though can pass through quench treatment, improve hardness, but because of anti-oxidant, corrosion resistance nature is low, use is easily got rusty, easily harden during welding, martensitic precipitation replaces by 0Cr17Ni4Cu4Nb (being called for short 17-4) gradually in recent years, but the 17-4 stainless steel need carry out martensitic transformation by solution treatment, also need to carry out the martensite precipitation hardening by ageing treatment, the system of heat treatment process complexity, and it is on the low side to handle back hardness, and its HRC value is generally about 40, the highlyest can only reach 42, be not suitable for making osteotome, apparatus such as bone drill or shearing.Therefore, the research of special-purpose medicine equipment material is in the field of businessly extremely expected and is paid close attention to.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of medical PH Stainless Steel material and preparation method thereof, the characteristics that this stainless material has nontoxicity, intensity height, anti-oxidant, corrosion-resistant, non-corrosive, easily processes, can weld, thermal treatment process is easy are suitable for making various medicine equipments.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of medical PH Stainless Steel material provided by the invention, its chemical ingredients consists of by weight percentage: carbon C≤0.03%, chromium Cr 12～14%, nickel 6～8%, molybdenum Mo 2～4%, copper Cu≤2%, aluminium Al 0.8～1.2%, titanium Ti≤0.5～0.8%, silicon Si≤0.6%, manganese Mn≤0.6%, sulphur S≤0.03%, phosphorus P≤0.035%, surplus are iron Fe.
A kind of medical PH Stainless Steel preparation methods provided by the invention comprises the steps:
(1), prepares burden, melting, teeming by described chemical ingredients and weight percentage ranges thereof;
(2) steel ingot is heated to 1050～1200 ℃, forms forging stock or directly forge the forging of simple shape through hammer cogging;
(3) with forging stock reheat to 1050～1200 in the step (2) ℃, carrying out hot rolling, to be processed into slab or the diameter of thick 12～28mm be the bar of Φ 8～30mm, and air cooling is to room temperature then;
(4), make the medical device product parts through mechanical workout;
(5) the medical device product parts being carried out vacuum aging at 400～500 ℃ handles.
A kind of medical PH Stainless Steel material provided by the invention and preparation method thereof after melting, the teeming, through 1050～1200 ℃ of hot-work, forges, rolling or draw, pull out into bar, sheet material or silk material; Product component after the machining need only be handled through 400～500 ℃ of vacuum agings, by precipitation hardening, can obtain the mechanical property of high strength, high rigidity, and the HRC value can reach 50～58, and the product component surface can keep the original machining state of light.Through using proof, product component is under the high-temperature steam sterilized environment, and contacting non-corrosive under blood, body fluid and the physiological saline situation repeatedly, and anti-fight, counter-bending anti-twist, cutting edge is sharp, has intensity height, hardness height, corrosion-resistant, rustless characteristics, and have good toughness and cutting ability, be ideal 1,2 class medicine equipment proprietary materials.
Embodiment
Below technical scheme of the present invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
A kind of medical PH Stainless Steel material provided by the invention, its chemical ingredients consists of by weight percentage: carbon C≤0.03%, chromium Cr 12～14%, nickel 6～8%, molybdenum Mo 2～4%, copper Cu≤2%, aluminium Al 0.8～1.2%, titanium Ti 0.5～0.8%, silicon Si≤0.6%, manganese Mn≤0.6%, sulphur S≤0.03%, phosphorus P≤0.035%, surplus are iron Fe.
Stainless steel of the present invention is compared with the 0Cr17Ni4Cu4Nb martensitic precipitation, has reduced chromium content, has increased nickel content, adds 2～4% molybdenums simultaneously, to strengthen matrix and to improve anti-oxidant, corrosion resistance; And increase aluminium, titanium elements, and improve the age hardening effect, improve alloy property.
Medical PH Stainless Steel preparation methods provided by the invention comprises the steps:
(1) by described chemical ingredients and weight percentage ranges thereof, prepares burden, use vacuum induction melting, teeming;
(2) steel ingot is heated to 1050～1200 ℃, forms forging stock or directly forge the forging of simple shape through hammer cogging, final forging temperature is 820 ℃.In order to obtain crystal grain thinning and best mechanical property, when 820～930 ℃ of finish-forgings, add aximal deformation value, at least greater than 20%, the forging natural air cooling is to room temperature;
(3) with forging stock reheat to 1050～1200 in the step (2) ℃, carry out hot rolling and be processed into the slab of thick 12～28mm or be rolled into the bar that diameter is Φ 8～30mm, air cooling is to room temperature then;
(4) forging, bar, sheet material make the medical device product parts through mechanical workout; Do not need solution treatment or anneal before the processing;
(5) the medical device product parts are carried out vacuum aging at 400～500 ℃ and handle, separate out mutually by second and make martensite secondary sedimentation sclerosis, obtain high strength, high rigidity.
A kind of medical PH Stainless Steel material provided by the invention and preparation method thereof adopts vacuum induction melting, teeming, again through 1050～1200 ℃ of hot-work, forges, rolling or draw, pull out into bar, sheet material or silk material; Product component after the machining need only be handled through 400～500 ℃ of vacuum agings, by precipitation hardening, can obtain the mechanical property of high strength, high rigidity, and the HRC value can reach 50～58, and the product component surface can keep the original machining state of light.Through using proof, product component is under the high-temperature steam sterilized environment, and contacting non-corrosive under blood, body fluid and the physiological saline situation repeatedly, and anti-fight, counter-bending anti-twist, cutting edge is sharp, has intensity height, hardness height, corrosion-resistant, rustless characteristics, and have good toughness and cutting ability, be ideal 1,2 class medicine equipment proprietary materials.
Embodiment 1
According to stainless steel chemical component scope of the present invention and proportioning thereof, prepare burden, with vacuum induction melting 3 stoves, 3 steel ingots of cast, 20 kilograms on every steel ingot, its chemical analysis one-tenth is respectively in table 1.
The chemical ingredients of the medical PH Stainless Steel material that table 1 embodiment 1 provides
Above-mentioned steel ingot forges into Φ 10, Φ 20, Φ 30mm bar and 20 * 20 * 500mm square stock then through 1050～1200 ℃ of heating, forges the back air cooling to room temperature; Above-mentioned bar and square stock through mechanical workout, are made the surgery instrument product component, as tup, bone drill, bone file, opening cutter, pulp cavity file etc.; Above-mentioned then surgery instrument product component is imitated through 400～500 ℃ of vacuum and is handled, and its Mechanics Performance Testing the results are shown in table 2; Actual tested for hardness is listed in table 3.
The mechanical property of the medical PH Stainless Steel material that table 2 embodiment 1 provides
The medical PH Stainless Steel material that table 3 embodiment 1 provides is through the measured hardness HRC value of 400～500 ℃ of vacuum agings processing
Embodiment 2
According to stainless steel chemical component scope of the present invention and proportioning thereof, prepare burden, with 200kg vacuum induction melting 2 stoves, 2 the 180kg steel ingots of casting, its chemical analysis becomes to be respectively in table 4.
The chemical ingredients of the medical PH Stainless Steel material that table 4 embodiment 2 provides
Above-mentioned steel ingot is through 1050～1200 ℃ of heating, and hammer cogging is swaged into wide by 200 * thick 40mm square billet then, is rolled into the sheet material of the wide 200mm of thick 12～28mm again, forges the back air cooling to room temperature; Above-mentioned sheet material through cutting and machine tooling, is made 30 cover (180) pulp cavity files, and finished product pulp cavity file is after 400～500 ℃ of vacuum agings are handled, and the HRC hardness value reaches 50～58, and its tested for hardness is listed in table 5; Product is good through clinical application effect, the appearance light, and anticorrosive non-corrosive, durable and sharp, the actual measurement mechanical property is listed in table 6.
The medical PH Stainless Steel material of table 5 embodiment 2 confessions is through the measured hardness HRC value of 400～500 ℃ of vacuum agings processing
The mechanical property of the medical PH Stainless Steel material that table 6 embodiment 2 provides
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection domain with claim.
Claims (2)
1. a medical PH Stainless Steel material is characterized in that its chemical ingredients consists of by weight percentage: carbon C≤0.03%, chromium Cr 12～14%, nickel 6～8%, molybdenum Mo 2～4%, copper Cu≤2%, aluminium Al 0.8～1.2%, titanium Ti 0.5～0.8%, silicon Si≤0.6%, manganese Mn≤0.6%, sulphur S≤0.03%, phosphorus P≤0.035%, surplus is iron Fe.
2. a medical PH Stainless Steel preparation methods is characterized in that, comprises the steps:
(1), prepares burden, melting, teeming by described chemical ingredients of claim 1 and weight percentage ranges thereof;
(2) steel ingot is heated to 1050～1200 ℃, forms forging stock or directly forge the forging of simple shape through hammer cogging;
(3) with forging stock reheat to 1050～1200 in the step (2) ℃, carrying out hot rolling, to be processed into slab or the diameter of thick 12～28mm be the bar of Φ 8～30mm, and air cooling is to room temperature then;
(4), make the medical device product parts through mechanical workout;
(5) the medical device product parts being carried out vacuum aging at 400～500 ℃ handles.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714063A (en) * | 2014-12-03 | 2016-06-29 | 北京有色金属研究总院 | Preparation method of 0Cr17Ni4Cu4Nb precipitation-hardening stainless steel bar |
| CN111235473A (en) * | 2020-01-18 | 2020-06-05 | 湖州久旺不锈钢制品有限公司 | Stainless steel and production process thereof |
| CN114317904A (en) * | 2022-01-05 | 2022-04-12 | 无锡派克新材料科技股份有限公司 | Forming method of precipitation hardening high-temperature alloy forging for aircraft engine |
| CN115927973A (en) * | 2023-01-03 | 2023-04-07 | 中国原子能科学研究院 | Martensite stainless steel and preparation method and application thereof |
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| CN101087897A (en) * | 2004-12-23 | 2007-12-12 | 山特维克知识产权股份有限公司 | Precipitation hardenable martensitic stainless steel |
| CN101092677A (en) * | 2007-07-17 | 2007-12-26 | 陈晴祺 | Precipitation hardening type stainless steel with high density |
| JP2008056983A (en) * | 2006-08-30 | 2008-03-13 | Daido Steel Co Ltd | Precipitation hardening type stainless steel die |
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2011
- 2011-03-28 CN CN 201110075436 patent/CN102168228A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101087897A (en) * | 2004-12-23 | 2007-12-12 | 山特维克知识产权股份有限公司 | Precipitation hardenable martensitic stainless steel |
| JP2008056983A (en) * | 2006-08-30 | 2008-03-13 | Daido Steel Co Ltd | Precipitation hardening type stainless steel die |
| CN101092677A (en) * | 2007-07-17 | 2007-12-26 | 陈晴祺 | Precipitation hardening type stainless steel with high density |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714063A (en) * | 2014-12-03 | 2016-06-29 | 北京有色金属研究总院 | Preparation method of 0Cr17Ni4Cu4Nb precipitation-hardening stainless steel bar |
| CN111235473A (en) * | 2020-01-18 | 2020-06-05 | 湖州久旺不锈钢制品有限公司 | Stainless steel and production process thereof |
| CN114317904A (en) * | 2022-01-05 | 2022-04-12 | 无锡派克新材料科技股份有限公司 | Forming method of precipitation hardening high-temperature alloy forging for aircraft engine |
| CN114317904B (en) * | 2022-01-05 | 2024-01-19 | 无锡派克新材料科技股份有限公司 | Forming method of precipitation hardening high-temperature alloy forging for aero-engine |
| CN115927973A (en) * | 2023-01-03 | 2023-04-07 | 中国原子能科学研究院 | Martensite stainless steel and preparation method and application thereof |
| CN115927973B (en) * | 2023-01-03 | 2024-03-22 | 中国原子能科学研究院 | Martensitic stainless steel and preparation method and application thereof |
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Application publication date: 20110831 |