CN1072733A - Ionic nitridation technology with rare earth catalytic permeating - Google Patents
Ionic nitridation technology with rare earth catalytic permeating Download PDFInfo
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- CN1072733A CN1072733A CN 91107932 CN91107932A CN1072733A CN 1072733 A CN1072733 A CN 1072733A CN 91107932 CN91107932 CN 91107932 CN 91107932 A CN91107932 A CN 91107932A CN 1072733 A CN1072733 A CN 1072733A
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- energizer
- rare earth
- ionitriding
- rare
- nitrogen
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Abstract
The invention discloses a kind of ionitriding new technology of adding rare-earth energizer, be applicable to the thermo-chemical treatment of metallic surface.Energizer is the mishmetal that contains lanthanum and cerium.Because rare earth does not have element and has the intensive chemically reactive, can form corresponding compounds with oxygen, hydrogen, nitrogen effect, and can accelerate the decomposition of nitrogen, hydrogen compound, therefore, in in ion-nitriding furnace that workpiece is packed into, add the mishmetal energizer, can realize the rare earth catalytic cementation ionitriding.The present invention and conventional ion nitriding are compared, and infiltration rate is obviously accelerated, and generally can improve 25～40%, and nitrided layer hardness distributes mild, and infiltration layer fragility reduces.Simultaneously, processing method of the present invention is simple, be easy to grasp, and the rare earths material wide material sources, therefore, remarkable in economical benefits.
Description
The present invention is the metallic surface thermo-chemical treatment, is a kind of ionitriding new technology of adding rare-earth energizer.
The workpiece of handling through ionitriding has high wear resistance and good anti-fatigue performance.But the explained hereafter cycle of adopting feeding mixed gas hydrogeneous, nitrogen to carry out ionitriding at present is long, and energy consumption is big, and the especially ionitriding of stainless steel part because of there is oxide film in the surface, needs the longer time nitriding.Japan JD59-035672 patent adopts methods such as adding supporting electrode, utilizes glow discharge to make workpiece be warming up to 300～450 ℃, reduces and the elimination oxide film, 500～600 ℃ of nitridings, can make complex part obtain the uniform nitriding layer to the greatest extent.This method is being produced effects not quite aspect obviously shortening the production cycle.At present, all exploring an effective catalytic cementation technology that improves nitriding speed both at home and abroad.
Purpose of the present invention overcomes above-mentioned the deficiencies in the prior art exactly, provides a kind of processing method simple, and infiltration rate is obviously accelerated, the ionic nitridation technology with rare earth catalytic permeating that easy handling is grasped.
The present invention finishes in the following manner.In in stove that workpiece is packed into, the mishmetal (wherein the content sum of lanthanum and cerium is greater than 35%) that will contain lanthanum and cerium is hung on the grate or be placed on the negative plate face, vacuumizes then, feeds ammonia, add high pressure and electric current, just realized the rare earth catalytic cementation ionitriding.And best content of rare earth is that to contain lanthanum and cerium be 40%～50% mishmetal.
Rare earth element has the intensive chemically reactive, and it can form corresponding compounds with oxygen, hydrogen, nitrogen effect, and can accelerate the decomposition of nitrogen, hydrogen compound.In the ionitriding process, the gases such as ammonia that contain the nitrogen element are ionized, and when having high-octane nitrogen ion and hydrogen ion bombardment workpiece surface, also make rare earth generation ionization.Rare earth ion is adsorption of nitrogen, hydrogen ion and help gaseous activation not only, also can be deposited on workpiece surface, has an effect with oxide film and plays the effect of clean workpiece.On the other hand, have high density dislocation in the ion-nitriding layer, the rare earth element that is deposited on the surface also can infiltrate workpiece along the dislocation district.These rare earth ions (containing atom) are further attached nitrogen atom again, the top layer nitrogen concentration is improved and forms corresponding nitride, promote simultaneously nitrogen-atoms along the dislocation district to the steel internal divergence.
Technological process according to above principle invention is provided by following embodiment, will be of a size of the 38C of φ 20mm * 10mm
lM
OAI, 40C
r, 4C
r14Ni14W2M
O, 20C
rM
nThe Ti steel each 4 with contain lanthanum and cerium about 45%, 2 of the mishmetals about heavy 0.25kg are together put on the negative plate face of LD-25 type ion-nitriding furnace, are evacuated to 10
-2Behind the torr, feed ammonia and make air pressure remain on 2～5 torrs, voltage, electric current are respectively 600V, and 60A, nitriding temperature are 530 ℃, and nitriding time is 3～7 hours.Compare with the conventional ion nitriding, obtain following result:
1, infiltration rate can improve 25～40%;
2, nitrided layer hardness distributes gently, and infiltration layer fragility reduces;
3, polishing machine is further enhanced.
Detailed data please be seen following synopsis
The rare-earth energizer wide material sources that the present invention uses, cheap, and can use repeatedly.Adopt this technology obviously to reduce the production cycle, enhance productivity remarkable in economical benefits.
530 ℃ of ionitriding layer depth (mm) synopsis
Claims (3)
1, a kind of ionitriding technology of adding energizer, it is characterized in that: energizer is the mishmetal that contains lanthanum and cerium, wherein the content sum of lanthanum and cerium is greater than 35%.
2, ionitriding technology according to claim 1 is characterized in that: the optimum value of lanthanum and cerium content sum is 40%～50% in the energizer.
3, ionitriding technology according to claim 1 is characterized in that: energizer is hung on the frame in nitriding furnace or is placed on the negative plate face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107932 CN1025225C (en) | 1991-11-23 | 1991-11-23 | Ionic nitridation technology with rare earth catalytic permeating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107932 CN1025225C (en) | 1991-11-23 | 1991-11-23 | Ionic nitridation technology with rare earth catalytic permeating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1072733A true CN1072733A (en) | 1993-06-02 |
| CN1025225C CN1025225C (en) | 1994-06-29 |
Family
ID=4908935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91107932 Expired - Fee Related CN1025225C (en) | 1991-11-23 | 1991-11-23 | Ionic nitridation technology with rare earth catalytic permeating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025225C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100363528C (en) * | 2006-01-24 | 2008-01-23 | 哈尔滨意锋稀土材料开发有限公司 | Chemical heat treatment for solid rare earth accelerant |
| CN100363529C (en) * | 2005-09-19 | 2008-01-23 | 哈尔滨意锋稀土材料开发有限公司 | Permeation promoter for organic RE chemical heat treatment and its application |
| CN1966761B (en) * | 2006-11-03 | 2010-09-22 | 广东世创金属科技有限公司 | Method for adding rare earth into rare earth modified coating in ion plating |
| CN103849830A (en) * | 2014-03-29 | 2014-06-11 | 蚌埠铁路五金建材总厂 | Catalytic penetrating agent applied to nitriding treatment of railway public-work fittings |
| CN104988457A (en) * | 2014-03-31 | 2015-10-21 | 浙江机电职业技术学院 | Multi-element fast nitriding solid powder energizer |
| CN112029964A (en) * | 2020-08-31 | 2020-12-04 | 中铁二十局集团有限公司 | Method for manufacturing wear-resistant hob body |
| CN112176277A (en) * | 2020-09-28 | 2021-01-05 | 常州市汇丰天元热处理有限公司 | Quick-acting nitriding method for intergranular corrosion resistant structural steel |
-
1991
- 1991-11-23 CN CN 91107932 patent/CN1025225C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100363529C (en) * | 2005-09-19 | 2008-01-23 | 哈尔滨意锋稀土材料开发有限公司 | Permeation promoter for organic RE chemical heat treatment and its application |
| CN100363528C (en) * | 2006-01-24 | 2008-01-23 | 哈尔滨意锋稀土材料开发有限公司 | Chemical heat treatment for solid rare earth accelerant |
| CN1966761B (en) * | 2006-11-03 | 2010-09-22 | 广东世创金属科技有限公司 | Method for adding rare earth into rare earth modified coating in ion plating |
| CN103849830A (en) * | 2014-03-29 | 2014-06-11 | 蚌埠铁路五金建材总厂 | Catalytic penetrating agent applied to nitriding treatment of railway public-work fittings |
| CN104988457A (en) * | 2014-03-31 | 2015-10-21 | 浙江机电职业技术学院 | Multi-element fast nitriding solid powder energizer |
| CN112029964A (en) * | 2020-08-31 | 2020-12-04 | 中铁二十局集团有限公司 | Method for manufacturing wear-resistant hob body |
| CN112029964B (en) * | 2020-08-31 | 2022-06-17 | 中铁二十局集团有限公司 | Method for manufacturing wear-resistant hob body |
| CN112176277A (en) * | 2020-09-28 | 2021-01-05 | 常州市汇丰天元热处理有限公司 | Quick-acting nitriding method for intergranular corrosion resistant structural steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1025225C (en) | 1994-06-29 |
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