CN1884604A - Plasma surface metallurgical high chromium high molybdenum high-carbon steel and its preparation method - Google Patents
Plasma surface metallurgical high chromium high molybdenum high-carbon steel and its preparation method Download PDFInfo
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- CN1884604A CN1884604A CN 200510021197 CN200510021197A CN1884604A CN 1884604 A CN1884604 A CN 1884604A CN 200510021197 CN200510021197 CN 200510021197 CN 200510021197 A CN200510021197 A CN 200510021197A CN 1884604 A CN1884604 A CN 1884604A
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Abstract
This invention exposed a kind of plasma surface metallurgy high-chrome, high-molybdenum and high-carbon steel and its preparation method. On the surface of carburizing steel, penetrating the main alloying element chrome, and assistant alloying elements molybdenum or tungsten can form the alloy diffusion layer that solid solution on the surface of substrate or alloy diffusion layer + depositing layer. Them supersaturating and plasma carbonizing can form the high-chrome, high-molybdenum and high-carbon alloy layer. At last quenching and tempering can form the high-chrome, high-molybdenum and high-carbon surface, which content 10-15% chrome, 6-8% molybdenum and 2.0-3.0% carbon. The wearability, rigidity and red hardness are excellent.
Description
(1) technical field:
The present invention relates to surface metallurgic, specifically a kind of plasma surface metallurgical high chromium high molybdenum high-carbon steel and preparation method thereof
(2) background technology:
Mainly be to adopt two kinds of methods improving ferrous materials aspect wear-resisting at present: a kind of is to adopt the method for whole preparation to make high-abrasive material preferably, as high mangaenese steel, high chromium steel, rapid steel etc.High mangaenese steel generally uses under the bigger condition of the power of withstanding shocks, and use range is limited.Exist in the high chromium steel the eutectic carbides tissue of considerable influence is arranged work-ing life.Added more alloying element in the rapid steel,, will cause the waste of alloying element for the higher part of surface size accuracy requirement.The resource of alloying element tungsten, molybdenum worldwide surveys with minable reserves and only enough used in 40～60 years, adds that hiding reserves also only reached 100 years, and therefore saving alloying element has the important strategic meaning.Another kind is to adopt the surface-treated method, improves the wear resisting property on surface.General surface treatment method is by changing composition, tissue and the structure on surface, improving the performance on surface, thereby increase the service life.As settled layer such as the titanium nitride, titanium carbide and the chromium nitride that form high rigidity at steel surface or carry out diffusion layers such as carburizing, nitrogenize and sulfurizing.But the formed settled layer of these methods is often relatively poor because of bonding force, in use, very easily produces and peels off, and formed diffusion layer is limited because of improving wear resistance, influences work-ing life equally.
(3) summary of the invention:
The objective of the invention is to disclose and a kind ofly formed the incrust chromium high molybdenum high high-carbon strengthening layer of one deck by the converted steel material surface, and the equal surface metallurgical high chromium high molybdenum high-carbon steel and preparation method thereof preferably of rigid, red hardness, wear resistance.
Plasma surface metallurgical high chromium high molybdenum high-carbon steel of the present invention, be to be infiltrated main addition element chromium by the converted steel material surface, and the assistant alloy molybdenum, formation is dissolved in chromium, molybdenum alloy diffusion layer or chromium, the molybdenum alloy diffusion layer+settled layer of steel surface, and then carries out the over-saturation ion carburizing, glowdischarge carburizing, form chromium high molybdenum high high carbon alloy layer, quench at last and tempering form the high carbon-coating of formed surperficial chromium high molybdenum high, chromium content 10～15%, the content 6～8% of molybdenum, carbon content 2.0～3.0%.
The preparation method of high chromium high molybdenum high-carbon steel of the present invention comprises the steps:
1, in vacuum apparatus, the diameter that a hollow is set is the iron container of 40～80mm, as cathode construction, will be placed in this iron container by the converted steel material, presses 10 * 10mm on the circumference of iron container
2Area settle chromium silk, the molybdenum filament of diameter 3～8mm, long 10～30mm, the chromium silk is 13: 1 with the number ratio of molybdenum filament, and a high-voltage DC power supply is set between vacuum apparatus shell and cathode construction simultaneously; Earlier vacuum apparatus is evacuated down to 10
-1Pa, charge into the working gas argon gas, to vacuum tightness 20～30Pa, between vacuum apparatus shell and cathode construction, add high-voltage dc voltage again, produced glow discharge by the converted steel material surface, high-voltage subatmospheric cleaning is by converted steel material surface number minute, after treating that aura is stable, progressively add argon gas to 30～60Pa, adjust high-voltage dc voltage, be incubated when being raised to 950～1050 ℃ by the converted steel material temperature, promptly enter the plasma surface alloying process process, the alloying element that is ionized is atom, ionic condition is adsorbed in by the converted steel material surface, High temperature diffusion enters by in the converted steel material, forms the alloy layer of chromium high molybdenum high;
2, incite somebody to action being placed in the ion carburizing, glowdischarge carburizing equipment of alloying by the converted steel material, be evacuated down to 1Pa when above, begin with the external heat source heating by the converted steel material, after treating to be raised to 900～1050 ℃ by the converted steel material temperature, feed methane gas and nitrogen, throughput ratio is: 1～3: 7～10, volts DS adds high pressure, make and produced glow discharge between converted steel material and the carburizing furnace shell, carry out ion carburizing, glowdischarge carburizing technology, described external heat source with the output rating ratio of glow discharge is: 10～7: 3～1;
3, after carburizing finishes, charge into nitrogen to malleation, can reach 6bar, it is air-cooled to carry out high pressure, implements quenching technology; Through 150～200 ℃ of low-temperaturetemperings, can obtain the high chromium high molybdenum high-carbon steel of vacuum plasma treatment at last.
The technology characteristics of plasma surface metallurgical high chromium high molybdenum high-carbon steel of the present invention is: the Technology of formed chromium high molybdenum high high carbon alloy layer, adopt plasma surface metallurgic vacuum processing technique technology fully, promptly in vacuum apparatus, utilize the ultimate principle of glow discharge, by glow discharge with solid chromium, molybdenum is with atom, the ionic form sputters out, these atoms, ion will be by diffusion, formed chromium by converted steel material matrix surface, the molybdenum alloy diffusion layer, also can form chromium, molybdenum alloy diffusion layer+settled layer, the over-saturation ion carburizing, glowdischarge carburizing will make the surface reach chromium high molybdenum high high carbon alloy layer, and last vacuum hardening and tempering reach the purpose of strengthening surface.
Show that according to test the average relative wear resistance of the high chromium high molybdenum high-carbon steel that is obtained is 2.2 times of GCr15 carburizing and quenching steel, surface hardness average out to 1300HV
0.025, through 690 ℃ of tempering 4 hours, the alloy layer surface hardness still remained on 595
0.025About HV, suitable with metallurgical rapid steel.Wear resistance, hardness and red hardness are all higher, are fine high-abrasive materials.
Assistant alloy element of the present invention also can be a tungsten.
The invention has the advantages that: (1), adopt cheap, aboundresources, convenient and simple carbon steel material as the body material that is oozed, reduced product cost; (2), utilize the point discharge in the glow discharge, atoms metal, ion that the effect of hollow cathode effect and sputter bombardment can provide desire to infiltrate easily do not have environmental pollution; (3), only infiltrate less alloying element, just reached higher surface property, economize on resources and the energy at material surface; (4), the effect of vacuum-treat and ion bombardment not only realizes easily infiltrating for the surface of chrome-bearing alloy element, and reaches the requirement of high level; (5), the high chromium high molybdenum high-carbon steel wear resistance, hardness and the red hardness that are obtained are all higher, are fine high-abrasive materials.
(4) embodiment:
Oozed sample by the converted steel material with the Q235 steel, the key step of its preparation method is as follows:
In vacuum apparatus, placement one is of a size of the hollow iron container of 80 * 50 * 5mm (diameter * height * wall thickness) earlier, above by per 10 * 10mm
2Area settle that diameter 5mm is long to be chromium silk and the molybdenum filament of 30mm, chromium is 13: 1 with the number ratio of molybdenum.Place three Q235 steel samples in the iron container of hollow, it is of a size of 20 * 20 * 5mm (long * wide * thick), is oozed specimen surface through mechanical polishing.Be evacuated down to 10
-1Pa, charge into the working gas argon gas, to vacuum tightness 20Pa, between vacuum apparatus shell and sample, add high direct voltage, specimen surface produces glow discharge, high-voltage subatmospheric cleaning specimen surface is about 3 minutes, after treating that aura is stable, progressively aerating is pressed onto 50Pa, making alive, make and oozed sample and be warmed up to about 1000 ℃, begin to carry out the plasma surface alloying process process.Be incubated after 3 hours, turn off direct supply, furnace cooling is to room temperature, and can obtain thickness is the alloying layer that contains chromium and molybdenum of 100um.
Second step was carried out ion carburizing, glowdischarge carburizing.The sample on above-mentioned surface alloying is placed in the ion carburizing, glowdischarge carburizing equipment, is evacuated down to 1Pa, begin to utilize the external heat source heating sample, treat sample to 980 ℃, feed methane gas and nitrogen, throughput ratio is: 1: 10.And the volts DS that adds high pressure, making to be oozed between sample and the carburizing furnace shell to produce glow discharge, external heat source with the output rating ratio of glow discharge is: 10: 3, carry out ion carburizing, glowdischarge carburizing technology.Be incubated 6 hours, turn off DC high-voltage power supply, external heat source and pumped vacuum systems.Charge into nitrogen to malleation, reach 6bar.In this process, open cooling blower, it is air-cooled to carry out high pressure, implements quenching technology.When being cooled to below 80 ℃, sample is come out of the stove.Can obtain through the quenching sample behind the supersaturated carburizing.
Through the low-temperaturetempering of 150 ℃ * 2h, can obtain the steel with chromium high molybdenum high high-carbon strengthening layer of vacuum plasma treatment at last, its surperficial chrome content is 12%, contain that molybdenum is 7%, carbon content is 2.4%.
Claims (3)
1, a kind of plasma surface metallurgical high chromium high molybdenum high-carbon steel, it is characterized in that: infiltrated main addition element chromium by the converted steel material surface, and assistant alloy molybdenum, form solid solution in the alloy diffusion layer or the alloy diffusion layer+settled layer of matrix surface, and then carry out the over-saturation ion carburizing, glowdischarge carburizing, form chromium high molybdenum high high carbon alloy layer, quench at last and tempering form, the high carbon-coating of formed surperficial chromium high molybdenum high, chromium content is 10～15%, the content of molybdenum is 6～8%, and carbon content is 2.0～3.0%.
2, the preparation method of a kind of plasma surface metallurgical high chromium high molybdenum high-carbon steel as claimed in claim 1 is characterized in that comprising the steps:
(1) in vacuum apparatus, the diameter that a hollow is set is the iron container of 40～80mm, as cathode construction, will be placed in this iron container by the converted steel material, presses 10 * 10mm on the circumference of iron container
2Area settle chromium silk, the molybdenum filament of diameter 3～8mm, long 10～30mm, earlier vacuum apparatus is evacuated down to 10
-1Pa, charge into the working gas argon gas, to vacuum tightness 20～30Pa, between vacuum apparatus shell and cathode construction, add high-voltage dc voltage again, produced glow discharge by the converted steel material surface, high-voltage subatmospheric cleaning is by converted steel material surface number minute, after treating that aura is stable, progressively add argon gas to 30～60Pa, adjust high-voltage dc voltage, be incubated when being raised to 950～1050 ℃ by the converted steel material temperature, promptly enter the plasma surface alloying process process, the alloying element that is ionized is atom, ionic condition is adsorbed in by the converted steel material surface, High temperature diffusion enters by in the converted steel material, forms the alloy layer of chromium high molybdenum high;
(2) incite somebody to action being placed in the ion carburizing, glowdischarge carburizing equipment of alloying by the converted steel material, be evacuated down to 1Pa when above, begin with the external heat source heating by the converted steel material, after treating to be raised to 900～1050 ℃ by the converted steel material temperature, feed methane gas and nitrogen, throughput ratio is: 1～3: 7～10, volts DS adds high pressure, make and produced glow discharge between converted steel material and the carburizing furnace shell, carry out ion carburizing, glowdischarge carburizing technology, described external heat source with the output rating ratio of glow discharge is: 10～7: 3～1;
(3) after carburizing finishes, charge into nitrogen to malleation, can reach 6bar, it is air-cooled to carry out high pressure, implements quenching technology; Through 150～200 ℃ of low-temperaturetemperings, can obtain the high chromium high molybdenum high-carbon steel of vacuum plasma treatment at last.
3, the preparation method of a kind of plasma surface metallurgical high chromium high molybdenum high-carbon steel according to claim 2 is characterized in that: the number ratio of chromium silk and molybdenum filament is 13: 1.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838793A (en) * | 2010-04-03 | 2010-09-22 | 桂林电子科技大学 | Surface ferrite stainless steel and preparation method thereof |
| CN101195913B (en) * | 2007-01-25 | 2010-12-08 | 桂林电子科技大学 | Technique for forming chromium carbon nitrogen surface alloying layer by plasma composite process low-temperature |
| CN103459617A (en) * | 2011-03-29 | 2013-12-18 | 谢夫勒科技股份两合公司 | Method for producing a hardened, coated metal component |
| CN103981528A (en) * | 2014-05-15 | 2014-08-13 | 张佑锋 | Method for permeating tough ceramic into head of hammer |
| CN104195507A (en) * | 2014-09-16 | 2014-12-10 | 朱忠良 | Method for preparing reinforcing layer through plasma surface molybdenum and chromium co-osmosis of low-carbon steel |
| CN107881398A (en) * | 2017-11-14 | 2018-04-06 | 平潭诚信智创科技有限公司 | A kind of wearability high-carbon steel formula and preparation method thereof |
| CN107881293A (en) * | 2017-11-18 | 2018-04-06 | 蚌埠市嘉实机电设备制造有限公司 | A kind of processing method of low-shrinkage mould |
| CN112063964A (en) * | 2020-09-22 | 2020-12-11 | 扬州华芯金属科技有限公司 | Energy-saving and environment-friendly stainless steel surface hardening process method |
| CN113718210A (en) * | 2021-07-23 | 2021-11-30 | 广东白云学院 | Method for enhancing wear resistance of iron product and iron product |
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2005
- 2005-06-25 CN CNB2005100211978A patent/CN100476008C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101195913B (en) * | 2007-01-25 | 2010-12-08 | 桂林电子科技大学 | Technique for forming chromium carbon nitrogen surface alloying layer by plasma composite process low-temperature |
| CN101838793A (en) * | 2010-04-03 | 2010-09-22 | 桂林电子科技大学 | Surface ferrite stainless steel and preparation method thereof |
| CN103459617A (en) * | 2011-03-29 | 2013-12-18 | 谢夫勒科技股份两合公司 | Method for producing a hardened, coated metal component |
| CN103459617B (en) * | 2011-03-29 | 2015-07-01 | 谢夫勒科技股份两合公司 | Method for producing a hardened, coated metal component |
| CN103981528A (en) * | 2014-05-15 | 2014-08-13 | 张佑锋 | Method for permeating tough ceramic into head of hammer |
| CN103981528B (en) * | 2014-05-15 | 2016-08-24 | 张佑锋 | Tup head oozes toughness pottery process |
| CN104195507A (en) * | 2014-09-16 | 2014-12-10 | 朱忠良 | Method for preparing reinforcing layer through plasma surface molybdenum and chromium co-osmosis of low-carbon steel |
| CN107881398A (en) * | 2017-11-14 | 2018-04-06 | 平潭诚信智创科技有限公司 | A kind of wearability high-carbon steel formula and preparation method thereof |
| CN107881293A (en) * | 2017-11-18 | 2018-04-06 | 蚌埠市嘉实机电设备制造有限公司 | A kind of processing method of low-shrinkage mould |
| CN112063964A (en) * | 2020-09-22 | 2020-12-11 | 扬州华芯金属科技有限公司 | Energy-saving and environment-friendly stainless steel surface hardening process method |
| CN113718210A (en) * | 2021-07-23 | 2021-11-30 | 广东白云学院 | Method for enhancing wear resistance of iron product and iron product |
| CN113718210B (en) * | 2021-07-23 | 2024-02-27 | 广东白云学院 | Method for enhancing wear resistance of iron product and iron product |
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