CN1214374A - Surface metallurgical technology to precipitate hardened stainless steel - Google Patents
Surface metallurgical technology to precipitate hardened stainless steel Download PDFInfo
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- CN1214374A CN1214374A CN 98119059 CN98119059A CN1214374A CN 1214374 A CN1214374 A CN 1214374A CN 98119059 CN98119059 CN 98119059 CN 98119059 A CN98119059 A CN 98119059A CN 1214374 A CN1214374 A CN 1214374A
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Abstract
The present invention relates to metal surface metallurgy and specifically solid surface metallurgical process to form deposited hardened stainless steel on the surface of common metal. It features that one high alloy layer is first formed on the surface of metal by double layer glow ion metal-diffusing technology and hardened stainless steel is then deposited through soid solution and aging treatment. The said technology can save great amount of noble alloy elements, product obtained by the technology is easy to machine, low in cost and excellent performance.
Description
Surface metallurgical technology to precipitate hardened stainless steel of the present invention belongs to the category of surface metallurgic.It particularly is a kind of solid state surface metallurgical technology of PH Stainless Steel.
The present PH Stainless Steel of using is solidified and is formed through solid solution and ageing treatment to solid state crystallization by liquid state by smelting process.
In the aircraft industry of develop rapidly, many component surface working temperatures are very high, must satisfy certain intensity requirements and (it is generally acknowledged σ
b1500MN/m
2More than) and structure on high specific tenacity (intensity/proportion) is arranged, because of the specific tenacity of aluminium alloy and titanium alloy higher, so on aircraft industry, obtain bigger application.But aluminium alloy is at 150 ℃, and titanium alloy all significantly reduces in its specific tenacity more than 450 ℃, and titanium alloy costs an arm and a leg complex process.PH Stainless Steel is utilized intermetallic compound Ni
3Al, Ni
3Ti, Ni
3Mo, AB
2(Laplace phase), x phase precipitation hardening can obtain high intensity (σ
bCan reach 2000MN/m
2).Therefore this precipitation hardening ultrahigh-strength steel obtains widespread use aspect aircraft industry.
In the PH Stainless Steel of using at present, only require that in many aspects the steel surface has high performance, can satisfy service requirements.Yet because this steel vacuum metling moulding, whole whole high quality steel manufacturings, complex process, and cost height.Cause the waste of many valuable alloying elements.
Existing laid-open U.S. Patents, the patent No. is 4,520,268, relates to a kind of surface-alloying process, promptly only emphasizes to infiltrate alloying element at matrix surface, and technical finesse is not subsequently narrated.Disclosed in addition Chinese patent CN87104358.0 utilizes double glow plasma surface alloying technique to form the high alloy layer to carry out carburizing, quench treatment later on.Its strengthening mechanism realizes by carbide.
Surface metallurgical technology to precipitate hardened stainless steel purpose of the present invention is to utilize double glow plasma surface alloying technique or other surface metallurgical technology of having invented, at first infiltrates alloying element on the cheaper iron surface of price, forms surface alloying layer; Carry out solid solution and timeliness subsequently and handle, make surface alloying layer reach higher intensity and hardness, thereby satisfy when using performance requriements the surface.
The present invention is a kind of surface metallurgical technology to precipitate hardened stainless steel technology, be will insert in the enclosed vacuum container desire co-diffusioning alloy element form source electrode, by the workpiece of alloying element as negative electrode, public anode and auxiliary cathode.Be furnished with two cover adjustable direct supply of 0～1500V or the adjustable direct current pulse power sources of 0～1500V between negative electrode, source electrode and anode, the final vacuum of vacuum vessel is not less than 10
-1Pa, charge into rare gas element such as argon gas, nitrogen during work, operating air pressure is generally at 5～1333Pa, 900～1000 ℃ of workpiece metallic cementation temperature, voltage between negative electrode and the anode-400～-1500V, source electrode and anode voltage-900V～-1500V, the invention is characterized in that the hollow cathode effect that utilizes in the glow discharge heats metallic cementation, and forming a high alloy layer at workpiece surface, alloy layer composition scope is: Cr:13～25%; Ni:0～10%; Co:12～25%; Mo:1～5%; Al:0～3%; Ti:0～1%; Cu:0～5%; V:0～1%; Nb:0～1%; Ta:0～1%.Carry out 800～1100 ℃ solid solution and 300～500 ℃ ageing treatment subsequently, make alloying element in the alloy layer with Ni
3Al, Ni
3Ti, Ni
3Mo, AB
2(Laplace phase), x phase or Fe
2Evenly tiny separating out of the form disperse of intermetallic compounds such as Mo forms the surface precipitation hardening stainless steel.
Be provided with negative electrode, anode, auxiliary cathode and source electrode in workpiece places among the present invention, can charge into again in the time of can being evacuated and working in the auxiliary cathode cavity in the container of rare gas element medium (as argon gas, nitrogen).Between workpiece and the workpiece, between workpiece and the auxiliary cathode, between workpiece and the source electrode, the distance between source electrode and the auxiliary cathode between 10mm～20mm to produce equi-potential or non-equi-potential hollow cathode effect.The desire co-diffusioning alloy element of forming source electrode mainly refers to alloying elements such as molybdenum, vanadium, chromium, cobalt, titanium, aluminium, tantalum, nickel, niobium, copper.Oozed the steel that workpiece material is carbon containing≤0.10% among the present invention, steel alloy, stainless steel, high temperature steel, nickel-base alloy, metallic substance such as titanium base alloy.Being formed alloy layer by the workpiece surface of alloying element, should be intermetallic compound through the precipitated phase of solid solution and ageing treatment rear surface alloy layer, and what separate out with other precipitation hardening steel is alloy carbide, and alloy nitride etc. are different.
This shows because surface-alloying process and subsequent disposal technology are made up effectively, thereby make technology have advanced person's characteristics.
The workpiece of art breading of the present invention can satisfy the situation of having relatively high expectations for surface property, as the aforementioned in the aircraft industry.For some surface requirements height and heart portion also requires high-strength work piece not only, can at first select the base material of higher-strength to carry out treatment process of the present invention again, can reach its service requirements.
Of the present inventionly specifically execute real process and finish like this;
As negative electrode, desire co-diffusioning alloy element is as source electrode with workpiece, and auxiliary cathode is hollow, can be the barrel-shaped of square, garden shape or other shape.Place one can be evacuated and can charge into rare gas element them with in the sealed vessel that forms certain gaseous tension.This pressurized vessel final vacuum is not less than 10
-1Pa, can charge into certain gaseous media during work, as argon gas, operating air pressure is generally at 5Pa～1333Pa, and the adjustable direct supply of two covers, the 0～1500v that is disposed or high-pressure pulse direct current source are connected (two common anodes of power supplys) respectively with negative electrode, source electrode and anode in the vacuum vessel.When workpiece is placed, require between the workpiece surface or workpiece surface and auxiliary cathode surface between, source electrode surface and cathode surface, 10mm～20mm apart between source electrode surface and the auxiliary cathode surface.Source electrode is made up of desire co-diffusioning alloy element molybdenum, chromium, cobalt, nickel, aluminium element.The imitated workpiece shape of its shape is parallel opposed with it.In operating air pressure and operating voltage range, workpiece (negative electrode) and workpiece, workpiece and auxiliary cathode, workpiece and source electrode, source electrode and source electrode produce the intensive hollow cathode discharge between source electrode and the auxiliary cathode.Enforcement parameter cathode potential of the present invention is-450V that the current potential of source electrode is-1200V.3 kinds of compositions of PH Stainless Steel that matrix surface behind double-layer metallic glow ion cementation forms, as follows:
Sample 1:Cr:14.5%, Ni:8%, Mo:2.5%, Al:1%
Sample 2:Cr:12%, Ni:4.5%, Co:12.5%, Mo:5%
Sample 3:Cr:15%, Ni:0.2%, Co:20%; Mo:3%
In order to form surperficial high performance PH Stainless Steel, after formation contains cobalt, molybdenum, the contour alloy layer of chromium, to carry out follow-uply, solution treatment and timeliness are handled.Solid solution temperature is at 800～1100 ℃, and aging temperature is at 300～500 ℃.Make the processed workpiece top layer reach PH Stainless Steel hardness and performance by solid solution and ageing treatment.
Present embodiment hardened precipitated phase is intermetallic compound such as Ni
3Mo, AB
2And Fc
2Mo.
Claims (4)
1. a surface metallurgical technology to precipitate hardened stainless steel technology is to form source electrode with inserting desire co-diffusioning alloy element in the enclosed vacuum container, by the workpiece of alloying element as negative electrode, public anode and auxiliary cathode, be furnished with adjustable direct supply or the adjustable direct current pulse power source of 0～1500v of two cover 0～1500v between negative electrode, source electrode and anode, the final vacuum of vacuum vessel is not less than 10
-1Pa, charge into rare gas element (as Ar) during work, operating air pressure is generally at 5～1333Pa, 900～1000 ℃ of workpiece metallic cementation temperature, voltage between negative electrode and the anode-400～-1500V, source electrode and anode voltage-900～-1500V, it is characterized in that utilizing the hollow cathode effect in the glow discharge to heat metallic cementation and form a high alloy layer, alloy layer composition range: Cr:13～25% at workpiece surface; Ni:0～10%; Co:12～25%; Mo:1～5%; Al:0～3%; Ti:0～1%; Cu:0～5%; V:0～1%; Nb:0～1%; Ta:0～1% carries out 800～1100 ℃ solid solution and 300～500 ℃ ageing treatment subsequently, makes alloying element in the alloy layer with Ni
3Al, Ni
3Ti, Ni
3Mo, AB
2(Laplace phase) or x phase, Fe
2Evenly tiny separating out of the form disperse of intermetallic compounds such as Mo forms the surface precipitation hardening stainless steel.
2. according to the method for right 1: be provided with negative electrode, anode in workpiece places, auxiliary cathode and source electrode, can charge into again in the time of can being evacuated and working in the auxiliary cathode cavity in the container of rare gas element medium argon, between workpiece and the workpiece, between workpiece and the auxiliary cathode, between workpiece and the source electrode, distance between source electrode and the auxiliary cathode is between 10mm～20mm, to produce equi-potential or non-equi-potential hollow cathode effect, the desire co-diffusioning alloy element of forming source electrode mainly is meant alloying elements such as molybdenum, chromium, vanadium, brill, titanium, aluminium, tantalum, nickel, niobium.
3. according to the method for right 1, oozed metallic substance such as steel that workpiece material is carbon containing≤0.10%, steel alloy, stainless steel, high temperature steel, nickel-base alloy, titanium base alloy.
4. according to the method for right 1, the strengthening phase that surface alloying layer is separated out should mainly be an intermetallic compound, and what separate out with other precipitation hardening steel is that alloy carbide is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98119059A CN1109124C (en) | 1998-10-14 | 1998-10-14 | Surface metallurgical technology to precipitate hardened stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98119059A CN1109124C (en) | 1998-10-14 | 1998-10-14 | Surface metallurgical technology to precipitate hardened stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1214374A true CN1214374A (en) | 1999-04-21 |
| CN1109124C CN1109124C (en) | 2003-05-21 |
Family
ID=5226250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98119059A Expired - Fee Related CN1109124C (en) | 1998-10-14 | 1998-10-14 | Surface metallurgical technology to precipitate hardened stainless steel |
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| CN (1) | CN1109124C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340897C (en) * | 2001-12-19 | 2007-10-03 | 塞尔豪约特国际锻造股份公司 | Spectacle frame |
| CN100434565C (en) * | 2005-12-31 | 2008-11-19 | 武汉科技大学 | Process for preparing anti-bacteria stainless steel by double-layer glowing method |
| CN101838793A (en) * | 2010-04-03 | 2010-09-22 | 桂林电子科技大学 | Surface ferrite stainless steel and preparation method thereof |
| US8034197B2 (en) * | 2007-06-19 | 2011-10-11 | Carnegie Mellon University | Ultra-high strength stainless steels |
| CN104109842A (en) * | 2014-07-22 | 2014-10-22 | 桂林电子科技大学 | Surface hafnium-permeated+carburized high-temperature-resistant stainless steel and preparation method thereof |
| CN105745337A (en) * | 2013-12-02 | 2016-07-06 | 陶氏环球技术有限责任公司 | Precipitation hardening of tantalum coated metals |
| CN106381474A (en) * | 2016-08-31 | 2017-02-08 | 江苏华力金属材料有限公司 | Preparation method of composite wear-resistant coating on surface of stainless steel plate |
| CN115537505A (en) * | 2022-11-18 | 2022-12-30 | 太原科技大学 | Method for accelerating precipitation speed of copper-rich phase of copper-containing steel by electric pulse |
| US11692232B2 (en) * | 2018-09-05 | 2023-07-04 | Gregory Vartanov | High strength precipitation hardening stainless steel alloy and article made therefrom |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1016363B (en) * | 1989-05-30 | 1992-04-22 | 太原工业大学 | Technology of coating ion metal-infiltration on surface of metallic part |
| CN1089664A (en) * | 1993-01-06 | 1994-07-20 | 长春市华光热处理技术研究所 | Metallized cutting tool material and carburizing tech |
| CN1110332A (en) * | 1995-03-20 | 1995-10-18 | 长春市华光热处理技术研究所 | Postheating treatment process after metallic cementation |
-
1998
- 1998-10-14 CN CN98119059A patent/CN1109124C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340897C (en) * | 2001-12-19 | 2007-10-03 | 塞尔豪约特国际锻造股份公司 | Spectacle frame |
| CN100434565C (en) * | 2005-12-31 | 2008-11-19 | 武汉科技大学 | Process for preparing anti-bacteria stainless steel by double-layer glowing method |
| US9562274B2 (en) | 2007-06-19 | 2017-02-07 | Carnegie Mellon University | Method of making ultra-high strength stainless steels |
| US8034197B2 (en) * | 2007-06-19 | 2011-10-11 | Carnegie Mellon University | Ultra-high strength stainless steels |
| CN101838793A (en) * | 2010-04-03 | 2010-09-22 | 桂林电子科技大学 | Surface ferrite stainless steel and preparation method thereof |
| CN105745337A (en) * | 2013-12-02 | 2016-07-06 | 陶氏环球技术有限责任公司 | Precipitation hardening of tantalum coated metals |
| US9963757B2 (en) | 2013-12-02 | 2018-05-08 | Dow Global Technologies Llc | Precipitation hardening of tantalum coated metals |
| CN105745337B (en) * | 2013-12-02 | 2018-06-19 | 陶氏环球技术有限责任公司 | The precipitation-hardening of the metal of tantalum coating |
| CN104109842A (en) * | 2014-07-22 | 2014-10-22 | 桂林电子科技大学 | Surface hafnium-permeated+carburized high-temperature-resistant stainless steel and preparation method thereof |
| CN106381474A (en) * | 2016-08-31 | 2017-02-08 | 江苏华力金属材料有限公司 | Preparation method of composite wear-resistant coating on surface of stainless steel plate |
| CN106381474B (en) * | 2016-08-31 | 2019-01-22 | 江苏华力金属材料有限公司 | The preparation method of stainless steel surface composite anti-wear coating |
| US11692232B2 (en) * | 2018-09-05 | 2023-07-04 | Gregory Vartanov | High strength precipitation hardening stainless steel alloy and article made therefrom |
| CN115537505A (en) * | 2022-11-18 | 2022-12-30 | 太原科技大学 | Method for accelerating precipitation speed of copper-rich phase of copper-containing steel by electric pulse |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1109124C (en) | 2003-05-21 |
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