CN1626686A - Method for producing ageing steel of martensite without cobalt in high tensile and high toughness - Google Patents
Method for producing ageing steel of martensite without cobalt in high tensile and high toughness Download PDFInfo
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- CN1626686A CN1626686A CN 200310119052 CN200310119052A CN1626686A CN 1626686 A CN1626686 A CN 1626686A CN 200310119052 CN200310119052 CN 200310119052 CN 200310119052 A CN200310119052 A CN 200310119052A CN 1626686 A CN1626686 A CN 1626686A
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- cobalt
- maraging steel
- steel
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- 230000032683 aging Effects 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 6
- 239000010959 steel Substances 0.000 title claims abstract description 6
- 239000010941 cobalt Substances 0.000 title claims description 11
- 229910017052 cobalt Inorganic materials 0.000 title claims description 11
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims description 11
- 229910000734 martensite Inorganic materials 0.000 title abstract description 6
- 238000004519 manufacturing process Methods 0.000 title description 8
- 238000005482 strain hardening Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000005097 cold rolling Methods 0.000 claims abstract description 4
- 229910001240 Maraging steel Inorganic materials 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 14
- 238000011056 performance test Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 15
- 238000005242 forging Methods 0.000 description 7
- 239000010936 titanium Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Heat Treatment Of Steel (AREA)
Abstract
A machining technology for the aged 18(Ni)-series non-Co martensite steel with high strength and toughness includes hot working, cold working by direct cold rolling or machining without solution treatment, ageing at 400-600 deg.C for 0.5-3 hrs, and air or water cooling. Its advantages are short period and simplified heat treatment.
Description
Technical field:
The present invention relates to the new process for processing of the serial high-strength and high ductility maraging steel of 18 (Ni), specifically be applied in the production process of T250, T300 series cobalt-free maraging steel.
Technical background:
Maraging steel is with its excellent high-strength and high ductility and good processing properties and be applied in the numerous areas.The maraging steel of widespread use at present is be the no cobalt type of 18 (Ni) maraging steel of reinforced alloys element with nickel, molybdenum, titanium etc., and its trade mark has T200, T250, T300, T350 etc. (table 1 is the composition and the performance of the serial cobalt-free maraging steel of 18Ni type T).By table 1 as seen, cobalt-free maraging steel has very high intensity and toughness cooperates, and does not contain the precious metal cobalt simultaneously, thereby has saved production cost greatly, has also overcome the difficulty that China's cobalt resource lacks.But the present inventor finds in the actual production, and the production technique of cobalt-free maraging steel is comparatively loaded down with trivial details, and the production cycle is long, and the thermal treatment cost is higher.For this reason, be necessary to develop a kind of complete processing of new cobalt-free maraging steel, directly purpose is a simplified processing process, shortens the production cycle.So the complete processing of developing new cobalt-free maraging steel has the very necessity and the good prospects for application of reality.
The composition and the performance of table 1 18Ni type cobalt-free maraging steel
| The trade mark | Chemical ingredients/wt% | Mechanical property |
| Ni??????Mo???????Ti????????Al?????????Fe | ?σ bσ 0.2?δ 5ψ????K IC/Mpa??/MPa??/％?/％?/MPam 1/2 | |
| ?T200 ?T250 | 10～19 3～3.5 0.15～0.8 0.05～0.15 surplus 10～19 4.6～5.1 0.8～1.5 0.05～0.15 surplus | 1500??1400??10??60??155～200 1850??1750??8???55??120 |
| ?T?300 ?T?350 | 15～19 4.7～5.2 1.5～1.8 0.05～0.15 surplus 15～19 4.2 1.8～2.5 0.1 surpluses | ?2050??2000??7??40??80 ?2450??2400??6??25??35～50 |
Summary of the invention:
The objective of the invention is to propose a kind of working method of new cobalt-free maraging steel, under the prerequisite that guarantees various mechanical performance indexs under its former thermal treatment process, simplified processing process shortens the production cycle, simultaneously a large amount of save energy adapt to the industrial requirement of producing in enormous quantities.
The invention provides a kind of no cobalt high-strength and high ductility maraging steel working method, be applicable to the serial maraging steel of 18 (Ni), comprise hot-work, cold working, ageing treatment step, it is characterized in that:
In the cold working step, save solution treatment, cold rolling or mechanical workout is directly carried out;
In the ageing treatment step, higher 400 ℃-600 ℃ of treatment temp, shorter 0.5-3 of treatment time hour, air cooling or be cooled to room temperature.
The present invention does not have in the cobalt high-strength and high ductility maraging steel working method, and the steel ingot that forges the prerequisite confession is to smelt acquisition in strict accordance with traditional chemical ingredients and smelting technology.
The present invention does not have cobalt high-strength and high ductility maraging steel working method, can make indexs such as the intensity of 18 (Ni) cobalt-free maraging steel and plasticity reach level under original cobalt-free maraging steel complete processing, and other performance index are also near its level.
Usually, it is believed that its highly malleablized mechanism mainly is solution strengthening and precipitation strength, the Ni that wherein utilizes titanium and molybdenum to separate out in the serial cobalt-free maraging steel of 18 (Ni) in ag(e)ing process
3Mo and Ni
3It is main reinforcement means that Ti reaches highly malleablized.That is: (1) is by the austenite cool to room temperature under the high temperature, because martensite end of a period transition temperature more than room temperature, forms lath martensite completely; (2) carry out ageing treatment subsequently, control aging temp and aging time make the precipitated phase of oversaturated Ti, Mo and Ni separate out from martensitic border of lath and lath inside.Thereby reach the purpose of highly malleablized maraging steel.
The complete processing of the present invention 18 (Ni) cobalt-free maraging steel and the difference of the maximum of traditional 18Ni cobalt-free maraging steel complete processing are the effects of having abandoned solution treatment, improved the temperature of ageing treatment, shortened the time of ageing treatment, realized the influence of nickel, molybdenum, titanium equally the obdurability of lath martensite.In this technology, final forging temperature can not be lower than 850 ℃, evenly avoids producing mixed crystal with the distortion that guarantees alloy; Aging temp will be controlled at 500 ℃ or higher temperature, to reach the dual purpose of precipitation strength and destressing.Final forging temperature is low excessively, and matrix is easy to generate mixed crystal; Aging temp is low excessively, then makes the aging time lengthening, and precipitated phase easily segregation takes place and reduces intensity in the alloy, or makes the performance of alloy inhomogeneous.In the course of processing of a lot of alloys, this link of solution treatment is all arranged, its main purpose is austenitic homogenizing and eliminates forging stress etc.In this complete processing, owing to omitted this procedure, certain for this reason higher final forging temperature and relative higher aging temp of guaranteeing, particularly important to realizing highly malleablized.
Embodiment:
The concrete complete processing that the present invention does not have cobalt high-strength and high ductility maraging steel is as follows:
Hot-work: steel ingot was handled 1-10 hour in 1120 ℃ of-1200 ℃ of homogenizing, and concrete soaking time is decided on the steel ingot size; Forge into bar and breaking down blank, the breaking down blank is rolled into the performance test blank 1200 ℃ of open rollings through multi-pass;
Cold working: if rolled sheet metal, can be on the basis of hot rolling slab direct cold rolling; If mechanical workout, can direct mechanical processing on the basis of forging bar.Here 600 ℃ of-900 ℃ of solution treatment in the traditional technology have been saved.
Ageing treatment: through after the cold working, 520 ℃ ageing treatment 0.5-3 hour, specifically decide on workpiece size, air cooling or water-cooled are to room temperature.
Embodiment
Three kind of 18 (Ni) serial cobalt-free maraging steel, each 10kg furnace charge, the chemical ingredients after its pair vacuum metling is as shown in table 2.Open forging through 1150 ℃, 850 ℃ of finish-forgings become after the Φ 18mm bar, and air cooling is machined into the mechanical property sample to room temperature, and 510 ℃ of timeliness 2.5 hours, air cooling was to room temperature subsequently then.Mechanical property is relatively as table 3 under its mechanical property and the former complete processing.
Table 2:
Table 3:
Claims (2)
1, a kind of no cobalt high-strength and high ductility maraging steel working method is applicable to the serial maraging steel of 18 (Ni), comprises hot-work, cold working, ageing treatment step, it is characterized in that:
In the cold working step, save solution treatment, cold rolling or mechanical workout is directly carried out;
In the ageing treatment step, higher 400 ℃-600 ℃ of treatment temp, shorter 0.5-3 of treatment time hour, air cooling or be cooled to room temperature.
2, according to the described no cobalt high-strength and high ductility maraging steel working method of claim 1, it is characterized in that: in the described hot procedure, steel ingot was handled 1-10 hour in 1120 ℃ of-1200 ℃ of homogenizing, forge into bar and breaking down blank, the breaking down blank is rolled into the performance test blank 1200 ℃ of open rollings through multi-pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101190522A CN1328395C (en) | 2003-12-12 | 2003-12-12 | Method for producing ageing steel of martensite without cobalt in high tensile and high toughness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101190522A CN1328395C (en) | 2003-12-12 | 2003-12-12 | Method for producing ageing steel of martensite without cobalt in high tensile and high toughness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1626686A true CN1626686A (en) | 2005-06-15 |
| CN1328395C CN1328395C (en) | 2007-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101190522A Expired - Fee Related CN1328395C (en) | 2003-12-12 | 2003-12-12 | Method for producing ageing steel of martensite without cobalt in high tensile and high toughness |
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|---|---|
| CN (1) | CN1328395C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104259240A (en) * | 2014-09-12 | 2015-01-07 | 攀钢集团江油长城特殊钢有限公司 | 18Ni-200 steel bar and preparation method thereof |
| CN107974626A (en) * | 2017-11-09 | 2018-05-01 | 苏州汉汽航空科技有限公司 | A kind of aviation high intensity parts are without cobalt green wood preparation method for material |
| CN109055690A (en) * | 2018-10-26 | 2018-12-21 | 西安长峰机电研究所 | A kind of heat treatment method improving Maraging steel comprehensive performance |
| CN110280764A (en) * | 2019-07-22 | 2019-09-27 | 陕西科技大学 | A kind of Maraging steel and preparation method thereof based on SLM molded part |
| CN113186464A (en) * | 2021-04-25 | 2021-07-30 | 东北大学 | Ultra-low carbon high-strength high-plasticity martensitic steel and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107993B (en) * | 1985-11-02 | 1987-09-02 | 北京钢铁学院 | Maraging steel containing no cobalt |
| CN1014079B (en) * | 1988-08-22 | 1991-09-25 | 冶金工业部钢铁研究总院 | Maraging steel and method of its production |
| JP3503959B2 (en) * | 1993-01-08 | 2004-03-08 | 日新製鋼株式会社 | High-strength stainless steel excellent in toughness and method for producing the same |
-
2003
- 2003-12-12 CN CNB2003101190522A patent/CN1328395C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104259240A (en) * | 2014-09-12 | 2015-01-07 | 攀钢集团江油长城特殊钢有限公司 | 18Ni-200 steel bar and preparation method thereof |
| CN104259240B (en) * | 2014-09-12 | 2016-03-09 | 攀钢集团江油长城特殊钢有限公司 | A kind of 18Ni-200 rod iron and preparation method thereof |
| CN107974626A (en) * | 2017-11-09 | 2018-05-01 | 苏州汉汽航空科技有限公司 | A kind of aviation high intensity parts are without cobalt green wood preparation method for material |
| CN109055690A (en) * | 2018-10-26 | 2018-12-21 | 西安长峰机电研究所 | A kind of heat treatment method improving Maraging steel comprehensive performance |
| CN110280764A (en) * | 2019-07-22 | 2019-09-27 | 陕西科技大学 | A kind of Maraging steel and preparation method thereof based on SLM molded part |
| CN113186464A (en) * | 2021-04-25 | 2021-07-30 | 东北大学 | Ultra-low carbon high-strength high-plasticity martensitic steel and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1328395C (en) | 2007-07-25 |
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