CN1109125C - Fe-W-Mo-Co type surface aged hardened alloy - Google Patents
Fe-W-Mo-Co type surface aged hardened alloy Download PDFInfo
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- CN1109125C CN1109125C CN98119062A CN98119062A CN1109125C CN 1109125 C CN1109125 C CN 1109125C CN 98119062 A CN98119062 A CN 98119062A CN 98119062 A CN98119062 A CN 98119062A CN 1109125 C CN1109125 C CN 1109125C
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Abstract
The present invention relates to an iron, tungsten, molybdenum and cobalt type surface age-hardening alloy which belongs to the field of solid state surface metallurgy, particularly to the preparation of a surface iron, tungsten, molybdenum and cobalt alloy and a solid solution age treatment process thereof. The present invention is characterized in that a tungsten source, a molybdenum source and a cobalt source are prepared; an iron, tungsten, molybdenum and cobalt high-alloy layer is formed on the surface of a selected backing material by using a double-layer glow ion infiltration metal technique; by solid dissolving and ageing treatment, obvious age hardening is generated. The iron, tungsten, molybdenum and cobalt type surface age-hardening alloy has the characteristics of simple heat treatment technique, small workpiece deformation after the heat treatment and high hardness. After metals are infiltrated, by the solid dissolving and the ageing treatment, the hardness is increased to 1000 to 1200Hv<0.2> from 400Hv<0.2> in a solid dissoving state. The iron, tungsten, molybdenum and cobalt type surface age-hardening alloy can be used for making cutting tools and can be used for the technical field of high wear resistance.
Description
A kind of metallurgical category of method metal surface that forms ferrotungsten molybdenum cobalt high alloy infiltration layer on the iron-base workpiece surface of the present invention.
Common metallurgic product iron, tungsten, molybdenum, cobalt aged hardened alloy have been listed U.S.'s metallurgic product catalogue in, in " rapid steel and thermal treatment thereof " book by China Machine Press's publication that Guo Geng three is shown relevant introduction are arranged.Domestic to iron, tungsten, molybdenum, cobalt type, iron, tungsten, molybdenum, cobalt, nickel type alloy are also studied, and the research article is published in mechanical engineering material magazine in 1993.Iron, tungsten, molybdenum, cobalt aged hardened alloy are demonstrating very big superiority aspect titanium alloy and the nickel base superalloy processing.But because its high alloy content, particularly high cobalt contents makes this alloy toughness deficiency, costs an arm and a leg, and these have all influenced the widespread use of this alloy.
A kind of method that forms ferrotungsten molybdenum cobalt high alloy infiltration layer on iron-base workpiece surface of the present invention disclose a kind ofly carries out iron, tungsten, molybdenum, cobalt-base alloyization on cheap iron surface, the technical scheme of formation iron, tungsten, molybdenum, Co type surface aged hardened alloy.
A kind of its technical characterictic of method that forms ferrotungsten molybdenum cobalt high alloy infiltration layer on the iron-base workpiece surface is to adopt tungsten, molybdenum, cobalt source, the derived components cobalt is 37～45%, tungsten is 28～35%, molybdenum is 25～35%, utilizes double glow plasma surface alloying technique to form iron, tungsten, molybdenum, cobalt high alloy infiltration layer at soft steel, technically pure iron, high carbon steel, low alloy steel substrate surface.The composition range of its surperficial infiltration layer is that cobalt is 18～30%, and tungsten is 9～20%, and molybdenum is 5～15% all the other iron.Tissue after iron, tungsten, molybdenum, Co type surface aged hardened alloy metallic cementation, solid solution, the timeliness, internal layer is different because of selected base material, and textura epidermoidea is respectively alloy ferrite and the intermetallic compound, low-carbon alloy martensite and residual a small amount of austenite and the not molten intermetallic compound of part, tempered martensite and tiny intermetallic compound of separating out in a large number and the originally not molten intermetallic compound that are distributed on the matrix.
Utilize double glow plasma surface alloying technique to carry out surface alloying, its plasma surface alloying process is metallic cementation temperature θ: 1150～1260 ℃, metallic cementation time t 〉=4 hours, working gas: industrial straight argon, stove internal gas pressure P:30～100Pa, source voltage V:900～1400v, source current area density σ: 2.5～4mA/cm
2, cathode voltage V:350～600v, cathodic current area density σ: 1.3～3mA/cm
2Carry out solid solution and ageing treatment after iron, tungsten, molybdenum, the Co type surface aged hardened alloy metallic cementation, its thermal treatment process is solid solubility temperature θ: 1200～1260 ℃, decide with workpiece size heat-up time, cools off in the oil; Aging temp θ: 500～560 ℃, 20～60 minutes heat-up times, iron, tungsten, molybdenum, Co type surface aged hardened alloy are by solid solution and the age hardening of ageing treatment generation intensive.Its sclerosis feature is that the intermetallic compound by diffusion-precipitation hardens, and hardness is by the 400Hv of solid solution attitude after the timeliness
0.2Rise to 1000～1200Hv
0.2, 2 hours surface hardnesses of 700 ℃ of heating are still at 600～700Hv
0.2
Concrete implementation step of the present invention is as follows:
1. source electrode is made
Utilize the nucleidic mass of tungsten, molybdenum, cobalt, utilize the transformational relation of atomic percent and mass percent, utilize tungsten, molybdenum, the data such as sputtering raste of cobalt under the 1kev energy to carry out the design of source electrode composition, make source electrode with powder metallurgy process.The source electrode composition is a cobalt: 37～45%, and tungsten: 28～35%, molybdenum: 25～35%.As requested, source electrode can be made into different shape, as: tabular, strip, brush shape.
2. workpiece is selected
As required, workpiece can be soft steel, technically pure iron, high carbon steel, low alloy steel.When the carbon amount greater than 0.2% the time, before surface alloying, carry out the carbonization treatment of top layer certain depth earlier, the precipitation strength of intermetallic compound mainly takes place in the top layer when guaranteeing timeliness.
3. double-layer metallic glow ion cementation
In furnace for double-layer metallic glow ion cementation, be source electrode with the source that makes, be negative electrode with selected workpiece, be that working gas carries out surface alloying with technical pure Ar.Concrete plasma surface alloying process as previously mentioned.
4. solid solution, ageing treatment
The metallic cementation sample is heated in high-temperature salt furnace, cool off in the oil then.Sample after the solution treatment is carried out ageing treatment in tempering stove, concrete thermal treatment process as previously mentioned.During timeliness by separating out (FeCo)
3(WMo)
2, (FeCo)
7(WMo)
6, (FeCo)
2(WMo) disperse phase generation intensive age hardening effect.
Iron, tungsten, molybdenum, Co type surface aged hardened alloy are compared with common iron, tungsten, molybdenum, cobalt type aged hardened alloy has following advantage: 1. because surface alloy is to obtain by solid-state metallurgical method, so there is not intermetallic compound in the alloy one time, intermetallic compound is small and dispersed extremely, like this when solid solution, overwhelming majority intermetallic compound all is dissolved in the matrix, be that most of alloying element all participates in precipitation strength, improved hardening effect.Contrast as can be known by Vickers' hardness and Rockwell hardness, the timeliness hardness of iron, tungsten, molybdenum, Co type surface aged hardened alloy surpasses 70HRC, and promptly hardness substantially exceeds the level of common iron, tungsten, molybdenum, cobalt type aged hardened alloy 68.5HRC.2. owing to be surface alloying, thereby save a large amount of alloying elements, particularly cobalt, saved resource, reduced cost, improved competition capability.3. experiment showed, that comparing surface alloy obtains satisfied performance with common iron, tungsten, molybdenum, cobalt type aged hardened alloy at the composition range of broad and the processing range of broad, thereby plasma surface alloying process and thermal treatment process are easy to all carry out.4. because surface alloy has the gradient composition, with common alloy phase ratio, it not only has high intensity, and also has good toughness.
Iron, tungsten, molybdenum, Co type surface aged hardened alloy are compared with surperficial rapid steel has following advantage: 1. thermal treatment process is simple.The thermal treatment process of iron, tungsten, molybdenum, Co type surface aged hardened alloy is solution treatment+ageing treatment, and the thermal treatment process of surperficial rapid steel is solution treatment+carburizing treatment+quench treatment+temper.Can find out that from thermal treatment process it is simple many that the thermal treatment process of the thermal treatment process specific surface rapid steel of iron, tungsten, molybdenum, Co type surface aged hardened alloy is wanted, like this, it can save the energy, reduce cost, reduce heat treatment deformation, improve the qualification rate of product.2. excellent property.Iron, tungsten, molybdenum, Co type surface aged hardened alloy hardness after solution treatment is 400Hv
0.2, the hardness after ageing treatment reaches 1000～1200Hv
0.2, and the maximum hardness after the surperficial rapid steel thermal treatment is at 750Hv
0.2Therefore, the performance of iron, tungsten, molybdenum, Co type surface aged hardened alloy is much better than the performance of surperficial rapid steel.The anti-softening test result of high temperature shows iron, tungsten, molybdenum, Co type surface aged hardened alloy 700 ℃ of insulations 2 hours, and hardness still keeps 600～700Hv
0.2, and surperficial rapid steel is incubated 2 hours for 700 ℃, hardness but has only 350Hv
0.2Illustrate that the high temperature resistance softening power of iron, tungsten, molybdenum, Co type surface aged hardened alloy is much better than the high temperature resistance softening power of surperficial rapid steel.Iron, tungsten, molybdenum, Co type surface aged hardened alloy not only can be used for cutting cutlery, and can be used for the high abrasion field.
Embodiment 1, with tungsten: 35%, molybdenum: 20%, cobalt: 45% alloy is a source electrode, is workpiece with the technically pure iron, carries out metallic cementation with double glow plasma surface alloying technique by following technology: V the moon=-450v, cathodic current area density σ=1.65mA/cm
2, the V source=-1100v, source current area density σ=3.42mA/cm
2, metallic cementation temperature θ=1240 ℃, t=6 hour metallic cementation time, air pressure P=40Pa.Behind the metallic cementation, the alloying constituent on top layer is a cobalt: 25%, and tungsten: 12%, molybdenum: 9% all the other iron.
Embodiment 2, carry out solid solution and ageing treatment with the surface alloy of embodiment 1, and technology is: solid solubility temperature θ=1240 ℃, heating is 5 minutes in the salt stove, cools off in the oil then.The solid solution sample is carried out ageing treatment in 540 ℃ tempering stove, aging time 40 minutes.Hardness 420Hv after the solid solution
0.2, hardness 1200Hv after the timeliness
0.2During timeliness by separating out (FeCo)
3(WMo)
2, (FeCo)
7(WMo)
6, (FeCo)
2(WMo) disperse phase generation intensive age hardening effect.
Claims (2)
1. method that forms ferrotungsten molybdenum cobalt high alloy infiltration layer on iron-base workpiece surface, it is characterized in that adopting tungsten cobalt source, derived components: cobalt is 37～45%, tungsten is 28～35%, molybdenum is 25～35%, utilize double glow plasma surface alloying technique at soft steel, technically pure iron, high carbon steel, the low alloy steel substrate surface forms iron, cobalt, tungsten, molybdenum high alloy infiltration layer, the composition range of its surface alloying layer is a cobalt 18～30%, tungsten 9～20%, molybdenum 5～15%, all the other iron, carry out solid solution and ageing treatment after the ferrotungsten molybdenum Co type surface aged hardened alloy metallic cementation, thermal treatment process is 1200～1260 ℃ of solid solubility temperatures, and decide with workpiece size heat-up time, cools off in the oil; 500～560 ℃ of aging temps, 20～60 minutes heat-up times, textura epidermoidea is respectively alloy ferrite and distribution intermetallic compound, low-carbon alloy martensite and residual a small amount of austenite and the not molten intermetallic compound of part, tempered martensite and tiny intermetallic compound of separating out in a large number and originally not molten intermetallic compound thereon after metallic cementation, solid solution, the timeliness, and interior layer tissue is different because of selected base material.
2. according to a kind of method that forms ferrotungsten molybdenum cobalt high alloy infiltration layer on the iron-base workpiece surface of claim 1, described carbon steel, low alloy steel base material carbon content were carried out the dark carbonization treatment in top layer earlier greater than 0.2% o'clock before surface alloying.
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| Application Number | Priority Date | Filing Date | Title |
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| CN98119062A CN1109125C (en) | 1998-10-14 | 1998-10-14 | Fe-W-Mo-Co type surface aged hardened alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN98119062A CN1109125C (en) | 1998-10-14 | 1998-10-14 | Fe-W-Mo-Co type surface aged hardened alloy |
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| CN1214375A CN1214375A (en) | 1999-04-21 |
| CN1109125C true CN1109125C (en) | 2003-05-21 |
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| CN98119062A Expired - Fee Related CN1109125C (en) | 1998-10-14 | 1998-10-14 | Fe-W-Mo-Co type surface aged hardened alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101323936B (en) * | 2008-07-14 | 2010-10-13 | 株洲硬质合金集团有限公司 | Cemented carbides big product aging treatment process |
| CN102936716A (en) * | 2012-11-06 | 2013-02-20 | 高金菊 | Method for preparing cobalt-based alloy layer on surface of TC4 titanium alloy |
| CN109234669B (en) * | 2018-09-20 | 2020-06-16 | 湖北上大模具材料科技股份有限公司 | Preparation method of Co-infiltrated plastic die steel and die steel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106757A (en) * | 1985-09-10 | 1987-04-15 | 电子工业部工艺研究所 | High-light ion metal-doping device and method thereof |
| CN1034229A (en) * | 1987-06-20 | 1989-07-26 | 太原工业大学 | Ion implantation technique for cutting tools |
| CN1047705A (en) * | 1989-05-30 | 1990-12-12 | 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 CN98119062A patent/CN1109125C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106757A (en) * | 1985-09-10 | 1987-04-15 | 电子工业部工艺研究所 | High-light ion metal-doping device and method thereof |
| CN1034229A (en) * | 1987-06-20 | 1989-07-26 | 太原工业大学 | Ion implantation technique for cutting tools |
| CN1047705A (en) * | 1989-05-30 | 1990-12-12 | 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 |
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