CN109371355A - A method of color at the control titanium alloy bearing insert class part angle of cut - Google Patents

A method of color at the control titanium alloy bearing insert class part angle of cut Download PDF

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Publication number
CN109371355A
CN109371355A CN201811396267.1A CN201811396267A CN109371355A CN 109371355 A CN109371355 A CN 109371355A CN 201811396267 A CN201811396267 A CN 201811396267A CN 109371355 A CN109371355 A CN 109371355A
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CN
China
Prior art keywords
titanium alloy
bearing insert
cut
angle
class part
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CN201811396267.1A
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Chinese (zh)
Inventor
孙振淋
师玉英
何培刚
吴彦芬
辛玉武
钱钰
张琼
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AECC Harbin Dongan Engine Co Ltd
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AECC Harbin Dongan Engine Co Ltd
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Priority to CN201811396267.1A priority Critical patent/CN109371355A/en
Publication of CN109371355A publication Critical patent/CN109371355A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

The invention belongs to titanium alloy component ion Plasma Nitriding Treatment technologies, and in particular to a kind of process for controlling color at the titanium alloy bearing insert class part angle of cut.The present invention is at a temperature of keeping 0.3~1.5L/min ammonia flow and titanium alloy bearing insert class part ion nitriding technology, inert gas is suitably poured into ion nitriding furnace, ionic nitriding furnace inner gas pressure is set to increase to 400~700Pa, and by adjusting ion nitriding furnace pulse-width controlled glow current, the aura thickness degree at the angle of cut is controlled.The stage control that the method that the present invention controls color at the titanium alloy bearing insert class part angle of cut passes through pressure and pulsewidth to glow discharge in ion nitriding furnace, effectively optimization ionic nitriding parameter, reduce aura thickness degree at the angle of cut, reduce the technological temperature at the angle of cut, so that the surface at the angle of cut is yellowish-brown, therefore deformation is small at the angle of cut, and part geometry precision meets technique requirement.

Description

A method of color at the control titanium alloy bearing insert class part angle of cut
Technical field
The invention belongs to titanium alloy component ion Plasma Nitriding Treatment technologies, and in particular to a kind of control titanium alloy bearing insert class The process of color at the part angle of cut.
Background technique
Titanium alloy bearing insert class part is during ionic nitriding, because of the wall and corner effect of glow discharge, in bearing insert Temperature superimposition is generated because aura layer is overlapped at the angle of cut of bottom, and temperature is excessively high, causes the color at the bushing angle of cut that purple sieve is presented It is blue, rather than it is golden yellow, it is easier that technological temperature is excessively high at the angle of cut, it is deformed, so that size swell, influences part geometry essence Degree.
Summary of the invention
The object of the present invention is to provide one kind to guarantee zero by color at the control titanium alloy bearing insert class part angle of cut The method of part geometric accuracy.
Technical solution of the invention are as follows: a method of color at the control titanium alloy bearing insert class part angle of cut, At a temperature of keeping 0.3~1.5L/min ammonia flow and titanium alloy bearing insert class part ion nitriding technology, to ion Suitably pour inert gas in nitriding furnace, ionic nitriding furnace inner gas pressure made to increase to 400~700Pa, and by adjusting from Sub- nitriding furnace pulse-width controlled glow current controls the aura thickness degree at the angle of cut.
It after the part is put into ion nitriding furnace, vacuumizes, vacuum degree is not more than 10Pa in furnace.
The inert gas is argon gas or nitrogen or combinations thereof.
The pulse duration range of the ion nitriding furnace technological temperature holding stage: 0.5~0.7.
The pulse duration range that the ion nitriding furnace pulsewidth increases thermophase is 0.3~0.5, ionic nitriding furnace inner gas pressure For 300~400Pa.
The titanium alloy bearing insert class part ion nitriding technology temperature is 800~950 DEG C.
The volume ratio of ammonia is not less than 6:1 in the ion nitriding furnace.
The ion nitriding furnace is additionally provided with auxiliary resistance heating system other than Heated by Glow Discharge system.
The adding thermal resistance of the auxiliary resistance heating system is located in ion nitriding furnace or its external surrounding.
The solution have the advantages that: the method that the present invention controls color at the titanium alloy bearing insert class part angle of cut passes through The stage control of pressure and pulsewidth to glow discharge in ion nitriding furnace effectively optimizes ionic nitriding parameter, reduces the angle of cut Locate aura thickness degree, reduces the technological temperature at the angle of cut, so that the surface at the angle of cut is yellowish-brown, therefore deformation is small at the angle of cut, Part geometry precision meets technique requirement.
Specific embodiment
Below with reference to embodiment, the present invention will be further described:
The method that the present invention controls color at the titanium alloy bearing insert class part angle of cut is keeping 0.3~1.5L/min ammonia At a temperature of flow and titanium alloy bearing insert class part ion nitriding technology, indifferent gas is suitably poured into ion nitriding furnace Body makes ionic nitriding furnace inner gas pressure increase to 400~700Pa, and puts by adjusting ion nitriding furnace pulse-width controlled aura Electric current controls the aura thickness degree at the angle of cut.
It after the part is put into ion nitriding furnace, vacuumizes, vacuum degree is not more than 10Pa in furnace, prevents residual gas in furnace Pollution is generated to subsequent ion nitriding process.
The volume ratio of ammonia is not less than 6:1 in the ion nitriding furnace, and the inert gas is argon gas or nitrogen or its group It closes, in the case where not influencing nitriding result, improves ionic nitriding furnace pressure.
It is adjusted when the ion nitriding furnace pulse-width adjustment using the stage, is 0.3~0.5 in the pulse duration range of temperature rise period, In technique holding stage pulsewidth are as follows: 0.5~0.7, it can control the small glow current density of different temperatures, to control aura thickness Degree.
Gas pressure is also that ladder increases in the ion nitriding furnace pulsewidth tune ion nitriding furnace, the liter before technological temperature Thermophase, furnace pressure is 300~400Pa, to match with glow current and in-furnace temperature, controls heating rate in furnace.
The titanium alloy bearing insert class part ion nitriding technology temperature be 800~950 DEG C, can accelerate nitrogen-atoms to Diffusion, Accelerate nitriding speed inside titanium alloy component.The ion nitriding furnace in order to realize that High temperature ion nitrogenizes, in addition to aura plus Outside hot systems, also need to increase auxiliary resistance heating system.The adding thermal resistance of the auxiliary resistance heating system is located at ionic nitriding In furnace or its external surrounding, so that ionic nitriding in-furnace temperature meets technique requirement.
Embodiment 1
By taking certain size titanium alloy bearing insert as an example, which is TA7.
1, part is put into the titanium alloy ionic nitriding special furnace with auxiliary thermal source, is evacuated to 7Pa.
2, when the part ionic nitriding, NH is selected3And N2Two kinds of mixed gas, two kinds of ratio of gas mixture are 6:1, heating Stage furnace inner gas pressure maintains 350Pa.
3, the temperature rise period is heated to 350 DEG C and starts to start aura, break up arc, for removing titanium alloy surface passivating film, adjusts The pulsewidth of whole ion nitriding furnace makes pulse duration range be in 0.40 ± 0.05 (pulse duration table shake).
4, it after heating reaches 900 DEG C, is kept the temperature, and increase NH3And N2The flow of mixed gas, improve furnace in air pressure extremely 550Pa, and pulse duration range is made to be promoted to 0.60 ± 0.05.
5, it in furnace after ionic nitriding heat preservation 10h, slowly reduces mixed gas in furnace and is passed through flow, be down to air pressure in furnace 350Pa, while pulse duration range is reduced to 0.40 ± 0.05, after being cooled to 350 DEG C, aura system is closed, and stop leading into furnace Enter gas.
6, it after part cools to 200 DEG C with the furnace, comes out of the stove air-cooled.
By above-mentioned process, face of the part after 900 DEG C of ion Plasma Nitriding Treatments, at the bearing insert bottom angle of cut Color is changed into yellowish-brown by pansy, meets the requirement of design.
Embodiment 2
By taking certain size titanium alloy bearing insert as an example, which is TA7.
1, part is put into the titanium alloy ionic nitriding special furnace with auxiliary thermal source, is evacuated to 10Pa.
2, when the part ionic nitriding, NH is selected3With two kinds of mixed gas of Ar, two kinds of ratio of gas mixture are 8:1, heating Stage furnace inner gas pressure maintains 300Pa.
3, the temperature rise period is heated to 300 DEG C and starts to start aura, breaks up arc, remove titanium alloy surface passivating film, adjust arteries and veins Wide scope is at 0.35 ± 0.05.
4, it after heating reaches 850 DEG C, is kept the temperature, and increase NH3With the flow of Ar mixed gas, improve furnace in air pressure extremely 600Pa, and pulse duration range is made to be promoted to 0.55 ± 0.05.
5, it in furnace after ionic nitriding heat preservation 8h, slowly reduces mixed gas in furnace and is passed through flow, be down to air pressure in furnace 300Pa, while pulse duration range is reduced to 0.35 ± 0.05, after being cooled to 300 DEG C, aura system is closed, and stop leading into furnace Enter gas.
6, it after part cools to 200 DEG C with the furnace, comes out of the stove air-cooled.
By above-mentioned process, face of the part after 850 DEG C of ion Plasma Nitriding Treatments, at the bearing insert bottom angle of cut Color is changed into yellowish-brown by pansy, meets the requirement of design.

Claims (9)

1. it is a kind of control the titanium alloy bearing insert class part angle of cut at color method, which is characterized in that keep 0.3~ It is appropriate into ion nitriding furnace at a temperature of 1.5L/min ammonia flow and titanium alloy bearing insert class part ion nitriding technology Inert gas is poured, so that ionic nitriding furnace inner gas pressure is increased to 400~700Pa, and by adjusting ion nitriding furnace pulsewidth Glow current is controlled, the aura thickness degree at the angle of cut is controlled.
2. the method for color at the control titanium alloy bearing insert class part angle of cut according to claim 1, which is characterized in that The inert gas is argon gas or nitrogen or combinations thereof.
3. the method for color at the control titanium alloy bearing insert class part angle of cut according to claim 1, which is characterized in that The pulse duration range of the ion nitriding furnace technological temperature holding stage: 0.5~0.7.
4. the method for color at the control titanium alloy bearing insert class part angle of cut according to claim 1, which is characterized in that The ion nitriding furnace pulsewidth increase thermophase pulse duration range be 0.3~0.5, ionic nitriding furnace inner gas pressure be 300~ 400Pa。
5. the method for color at the control titanium alloy bearing insert class part angle of cut according to claim 1, which is characterized in that The titanium alloy bearing insert class part ion nitriding technology temperature is 800~950 DEG C.
6. the method for color at the control titanium alloy bearing insert class part angle of cut according to claim 1, which is characterized in that The volume ratio of ammonia is not less than 6:1 in the ion nitriding furnace.
7. the method for color at the control titanium alloy bearing insert class part angle of cut according to claim 1, which is characterized in that The ion nitriding furnace is additionally provided with auxiliary resistance heating system other than Heated by Glow Discharge system.
8. the method for color at the control titanium alloy bearing insert class part angle of cut according to claim 1, which is characterized in that It after part is put into ion nitriding furnace, vacuumizes, vacuum degree is not more than 10Pa in furnace.
9. the method for color at the control titanium alloy bearing insert class part angle of cut according to claim 6, which is characterized in that The adding thermal resistance of the auxiliary resistance heating system is located in ion nitriding furnace or its external surrounding.
CN201811396267.1A 2018-11-21 2018-11-21 A method of color at the control titanium alloy bearing insert class part angle of cut Pending CN109371355A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110760788A (en) * 2019-10-29 2020-02-07 长春奥普光电技术股份有限公司 Modification treatment method for surface hardness of cast titanium alloy

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Publication number Priority date Publication date Assignee Title
CN1262341A (en) * 1999-01-23 2000-08-09 大连理工大学 Computer controlled ion nitrizing process and equipment with plasma source
CA2456520A1 (en) * 2004-01-30 2005-07-30 Hubert Patrovsky Nitriding method for improving surface characteristics of cobalt-chromium based alloys
CN102808146A (en) * 2012-09-12 2012-12-05 大连理工大学 Industrialized automatic control plasma source nitriding device and technology thereof
CN103233219A (en) * 2013-03-22 2013-08-07 常州大学 Metal TiN ceramic coating preparation process method
CN104388891A (en) * 2014-12-05 2015-03-04 西安赛福斯材料防护有限责任公司 Hardening method of inner surface of cylinder barrel of titanium and titanium alloy hydraulic cylinder
CN107858635A (en) * 2017-12-16 2018-03-30 贵州航天风华精密设备有限公司 A kind of device for the processing of T-shaped shaft sleeve parts glow ion nitriding

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1262341A (en) * 1999-01-23 2000-08-09 大连理工大学 Computer controlled ion nitrizing process and equipment with plasma source
CA2456520A1 (en) * 2004-01-30 2005-07-30 Hubert Patrovsky Nitriding method for improving surface characteristics of cobalt-chromium based alloys
CN102808146A (en) * 2012-09-12 2012-12-05 大连理工大学 Industrialized automatic control plasma source nitriding device and technology thereof
CN103233219A (en) * 2013-03-22 2013-08-07 常州大学 Metal TiN ceramic coating preparation process method
CN104388891A (en) * 2014-12-05 2015-03-04 西安赛福斯材料防护有限责任公司 Hardening method of inner surface of cylinder barrel of titanium and titanium alloy hydraulic cylinder
CN107858635A (en) * 2017-12-16 2018-03-30 贵州航天风华精密设备有限公司 A kind of device for the processing of T-shaped shaft sleeve parts glow ion nitriding

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110760788A (en) * 2019-10-29 2020-02-07 长春奥普光电技术股份有限公司 Modification treatment method for surface hardness of cast titanium alloy

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