CN101435053A - Nickel-chromium-rare earth powder metallurgy high-temperature alloy and use thereof - Google Patents
Nickel-chromium-rare earth powder metallurgy high-temperature alloy and use thereof Download PDFInfo
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- CN101435053A CN101435053A CNA2008102436166A CN200810243616A CN101435053A CN 101435053 A CN101435053 A CN 101435053A CN A2008102436166 A CNA2008102436166 A CN A2008102436166A CN 200810243616 A CN200810243616 A CN 200810243616A CN 101435053 A CN101435053 A CN 101435053A
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Abstract
The invention relates to a nickel-chromium rare earth powder smelting high-temperature alloy, and the compositions thereof by weight are as follows: 19 percent to 22 percent of nickel, 24 percent to 27 percent of chromium, 0.8 percent to 1.6 percent of niobium, 0.8 percent to 1.7 percent of silicon, 0.5 percent to 1.0 percent of titanium, 0.25 percent to 0.4 percent of carbon, 0.05 percent to 0.1 percent of rare earth element, 0 percent to 1.5 percent of manganese, 0 percent to 0.05 percent of sulfur, 0 percent to 0.05 percent of phosphorus, 0 percent to 0.05 percent of molybdenum and the balance of iron. The alloy has higher temperature strength and high-temperature stability as well as good friction resistance and corrosion resistance, and can be used as the materials for preparing a nozzle ring of a turbocharger, a nozzle ring of a micro turbine or a seat ring of an engine valve.
Description
Technical field
The present invention relates to a kind of nickel-chromium-rare earth powder metallurgy high-temperature alloy and as the application of component materials such as turbine supercharger nozzle ring, miniature gas turbine nozzle ring or engine valve retainer.
Background technology
The engine configurations turbo-supercharger can significantly improve power, reduces exhaust pollution, improve economic performance, is one of topmost technological development direction of present engine, and in recent years, the demand of whole world turbo-supercharger increases progressively significantly, has a extensive future.
Nineteen ninety is for the later stage, along with the automobile emissions standards and the energy-conservation requirement of increasingly stringent, and advanced country and area beginning variable turbocharging technologies in applicating geometric cross section on engine such as the U.S., Japan, Europe.This variable-geometry cross section turbo-supercharger belongs to current vehicle motor field advanced person's third generation turbo-supercharger, it can reduce Automotive Emission Pollution, make motor vehicle emission meet new request of national standard at present, more domestic supercharging blower enterprises are in positive research and development.Nozzle ring is the core component of variable-geometry cross section turbo-supercharger, because nozzle ring is work under high temperature (600～1100 ℃), combustion gas impact, vibration and high frequency variable velocity motion state, parts such as blade, subpanel directly contact with high-temperature fuel gas simultaneously, in addition, blade rotor and subpanel, driving-disc and crank (shift fork) constitute friction pair, and this has just proposed extremely strict requirement to the material of nozzle ring.The high-temperature behavior of part material such as jet blade, subpanel, as high temperature and creep resistance ability, hot strength, rub resistance, erosion resistance etc., determined the reliability of nozzle ring assembly work, the manufacturing accuracy of parts such as jet blade, subpanel, blade shape, mutual movement clearance etc. then have a direct impact the performance of nozzle ring.
The turbo-supercharger major failure in variable-geometry cross section has that nozzle ring is stuck, the nozzle ring not working, lose and regulate or situations such as control combustion gas effect, and its basic reason is due to part deformations such as jet blade, subpanel, driving-disc, oxidation, frictional wear and the repeated stress failure etc.
Turbine supercharger nozzle ring is except to geometrical shape, outside the requirement of tolerance of dimension aspect, its material is had higher requirement, and this material must have: good high-temperature stability is creep resisting ability, to guarantee enough hot strengths such as jet blade, subpanel; Good crocking resistance with the frictional wear that reduces each accessory part of nozzle ring, guarantee the movement clearance of each friction pair, thereby guarantee that nozzle ring goes slick; Good anti-oxidant, erosion resistance is with the corrosion of sulphur, carbon monoxide etc. in opposing high temperature oxidation and the combustion gas, prevents that oxide shedding engaging friction pair from causing nozzle ring clamping stagnation, stuck and can not turn round.
At present, the material preferably of making turbine supercharger nozzle ring mostly is nickel-base cast superalloy, refractory alloy cast iron or high temperature powder metallurgy.Comparatively speaking, China's technical foundation aspect superalloy is better, but superalloy cost height.At present, cast alloy iron mainly contains two kinds in CrMo alloy iron and chrome molybdenum soft steel, and the former frictional property is better, and latter's toughness is better, and both can not take into account simultaneously, and the manufacturing process complexity.For powder metallurgy high-temperature alloy, it mainly contains external HK30 powder metallurgy high-temperature alloy, adopts metallic powder injection moulding process, and manufacturing cost is lower, and the manufacturing accuracy height abroad is extensive use of, has broad prospects, but its tensile strength is lower, usually below 650Mpa; And, because external nickel resources is abundant, the shared composition of nickel content is higher in the chemical ingredients of existing powder metallurgy high-temperature alloy, and to the improvement of each performance with to improve also be to finish by raising nickel content, when material hardness is brought up to HV150, when use temperature was brought up to 900 ℃ of left and right sides, its nickel content need be broken through 30% (weight) usually; And China's nickel resources rareness, the nickel material cost is higher, applies to military field as strategic resource usually.Therefore press for and find a kind of material that can reduce cost and satisfy variable-geometry (cross section) turbo-supercharger service requirements.
Summary of the invention
In order to solve the problem of above-mentioned existence, the objective of the invention is to provides a kind of nickel-chromium-rare earth powder metallurgy high-temperature alloy that at high temperature has higher creep resisting ability, antioxidant property, corrosion resistance nature, crocking resistance in conjunction with the abundant characteristics of China's rare earth resources.
For achieving the above object, the technical solution adopted in the present invention is: a kind of nickel-chromium-rare earth powder metallurgy high-temperature alloy, wherein the weight percentage of each component is: nickel 19%～22%, chromium 24%～27%, niobium 0.8～1.6%, silicon 0.8～1.7%, titanium 0.5～1.0%, carbon 0.25～0.4%, rare earth element 0.05～0.1%, manganese 0～1.5%, sulphur 0～0.05%, phosphorus 0～0.05%, molybdenum 0～0.05%, iron are surplus.
Said rare earth element is preferably lanthanum, cerium or/and the scandium element.
Another purpose of the present invention provides above-mentioned nickel-chromium-rare earth powder metallurgy high-temperature alloy as the application of making component materials such as turbine supercharger nozzle ring, miniature gas turbine nozzle ring or engine valve retainer.
It is creep resisting ability that this alloy has good high-temperature stability, can guarantee enough hot strengths such as jet blade, subpanel; Have good crocking resistance, can reduce each accessory part of nozzle ring frictional wear, guarantee the movement clearance of each friction pair, thereby guarantee that nozzle ring goes slick; Have good anti-oxidant, erosion resistance, the corrosion that can resist sulphur, carbon monoxide etc. in high temperature oxidation and the combustion gas, thoroughly stifled exhausted because of secondary nozzle ring clamping stagnation, the stuck bad phenomenon that can not turn round that causes of oxide shedding engaging friction.
This nickel-chromium-rare earth powder metallurgy high-temperature alloy is applied to make the supercharging blower nozzle ring, and its good high-temperature stability is that creep resisting ability can guarantee enough hot strengths such as jet blade, subpanel, guarantees the enough elastic force of wear ring; Good crocking resistance can guarantee the work-ing life of wear ring; Good scratch-resistant performance with the frictional wear that reduces each mating parts of nozzle ring, guarantee the movement clearance of each friction pair, thereby guarantee that nozzle ring goes slick, reliable operation; Good anti-oxidant, erosion resistance is with the corrosion of sulphur, carbon monoxide etc. in opposing high temperature oxidation and the combustion gas, prevents that oxide shedding engaging friction pair from causing nozzle ring clamping stagnation, stuck and can not turn round.
In addition, the all work under high temperature (600～1100 ℃) environment of high temperature component such as miniature gas turbine nozzle ring, engine valve retainer, turbo-supercharger lining, need bear very high impact, high vibration, high friction, exhaust gas corrosion etc., this environment is similar to the Working environment of said nozzle ring, so alloy material of the present invention can satisfy the performance requriements of these parts fully.
Micro-alloying technology is the effective means that improves iron and steel, alloy material over-all properties, in the Essential Chemistry composition of iron and steel, add micro-strong carbide forming element Ti, Nb, V etc., the present invention is on the basis of existing nickel chromium triangle powder metallurgy high-temperature alloy, by optimizing and adjust the ratio of each chemical ingredients, suitably increase titanium elements and China than horn of plenty and the rare earth more cheap etc. with respect to nickel element, improve and improve the comprehensive technical performance of this material with this.
The adding of rare earth element can pure effectively alloy, eliminates the harm of harmful element (being impurity).Not to add rare earth elements such as cerium, lanthanum can purify crystal boundary, improve oxide film and basic adhesivity, also can improve the hot workability of alloy, in smelting, play deoxidation, desulfurization, purification alloy solution and sweep effect, and oxidation-resistance, the erosion resistance that improves alloy played an important role.The rare earth element scandium is usually used in alloying (additive of alloy), with intensity, hardness and the heat-resisting and performance of improving alloy.In molten iron, add a spot of scandium, can significantly improve the performance of cast iron;
Because rare earth element is polymerization Jin Jing circle partially often, thereby will causing too much that the alloy crystal boundary is poly-partially, addition causes fragility, therefore, the rare earth addition is controlled at that (to contain 0.1%) below 0.1% comparatively suitable.
In addition, titanium as adding element, can change the performance of iron and steel in iron and steel, makes steel under same tempering temperature, has higher intensity and hardness, or same hardness requires to be tempered to higher temperature down; Ti, Nb, V have refined crystalline strengthening as micro alloying element to steel, phase transformation strengthening, the effect of precipitation strength is improved mechanical property, but the add-on of titanium is advisable with 0.5%～1.0%.
In addition, Ti, Nb, V, Cr, Mo, elements such as w can also improve the creep rupture strength and the creep-resistant property of material, prevent the generation of crackle, can also prevent the hydrogen-type corrosion of iron and steel.
The component of alloy of the present invention and addition are to test according to Theoretical Calculation with through practice repeatedly to obtain, and compare with existing nickel-chrome alloy steel, and nickel-chromium-rare earth powder metallurgy high-temperature alloy material of the present invention has following beneficial effect:
1, the adding of rare earth element can improve the erosion resistance and the high-temperature behavior of alloy, has improved the relatively poor shortcoming of nickel chromium triangle sintered alloy high-temperature behavior; Can widen the use range of nozzle ring, the work-ing life of having improved supercharging blower at 950 ℃ of following steady operations.
2, the adding of titanium elements and to the adjustment of other composition improved alloy mechanical property, anti-oxidant,, the creep-resisting, corrosion-resisting performance, nickel-chromium-rare earth powder metallurgy high-temperature alloy material hardness scope of the present invention is HV150～220.
3, material of the present invention has been owing to added trace elements such as rare earth and titanium, improved the indexs such as flowability that forming materials adds the liquation in man-hour through facts have proved, makes to have had better manufacturing process performance.
4, this alloy material is of many uses, not only can be used for the supercharging blower nozzle ring, can also be used for component such as miniature gas turbine nozzle ring, engine valve retainer and valve actuating mechanism high temperature component and turbo-supercharger lining.
5, the mix proportion scheme of above-mentioned materials of the present invention fully in conjunction with China's national situation, is effectively saved the nickel element resource, utilizes China's rare earth and other resource than horn of plenty, has reduced manufacturing cost simultaneously.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is described further.
Embodiment 1
Nickel-chromium-rare earth powder metallurgy high-temperature alloy, its composition weight percentage is: nickel 19%, chromium 27%, niobium 1.0%, silicon 1.0%, titanium 1.0%, carbon 0.4%, rare earth (lanthanum La) 0.1%, manganese 1.2%, molybdenum 0.02%, iron surplus.
Embodiment 2
Nickel-chromium-rare earth powder metallurgy high-temperature alloy, its composition weight content is: nickel 22%, chromium 24%, niobium 1.5%, silicon 1.5%, titanium 0.6%, carbon 0.25%, rare earth (cerium Ce) 0.05%, sulphur 0.01%, phosphorus 0.02%, surplus is an iron.
Embodiment 3
A kind of nickel-chromium-rare earth powder metallurgy high-temperature alloy, by than, its weight percentage is: nickel 20%, chromium 26%, niobium 1.0%, silicon 1.7%, titanium 0.8%, carbon 0.3%, rare earth (scandium Sc) 0.08%, manganese 1.0%, sulphur 0.05%, phosphorus 0.01%, molybdenum 0.01%, surplus is an iron.
Embodiment 4
A kind of nickel-chromium-rare earth powder metallurgy high-temperature alloy, its each component weight percentage is: nickel 21%, chromium 25%, niobium 1.2%, 1.2% silicon, titanium 0.7%, carbon 0.35%, rare earth (lanthanum and cerium) 0.06%, manganese 0.05%, phosphorus 0.05%, molybdenum 0.05%, surplus is an iron.
More than each routine nickel-chromium-rare earth powder metallurgy high-temperature alloy all adopt present mature technology, be prepared from as methods such as powder metallurgy forming or powder metallurgy injection moldings.
Above-mentioned each routine nickel chromium triangle powder metallurgy high-temperature alloy material is made the reliability that the turbine supercharger nozzle ring blade can obviously improve supercharging blower, improves corrosion-resistant, rub resistance and mechanical property, improves the serviceability of turbine supercharger nozzle ring greatly.Component such as the miniature gas turbine jet blade of making by this material, engine valve retainer, turbo-supercharger lining, under the high corrosion of high temperature Working environment, still can reach good running effect, can not be subjected to the corrosion of combustion gas or frictional wear in use, performance and work-ing life improve greatly.
This alloy low cost of manufacture can realize producing in batches for component such as turbine supercharger nozzle ring, and considers to be applicable to fully China from economy and resource view.
Claims (5)
1, a kind of nickel-chromium-rare earth powder metallurgy high-temperature alloy, its weight consists of: nickel 19%～22%, chromium 24%～27%, niobium 0.8%～1.6%, silicon 0.8%～1.7%, titanium 0.5%～1.0%, carbon 0.25%～0.4%, rare earth element 0.05%～0.1%, manganese 0～1.5%, sulphur 0～0.05%, phosphorus 0～0.05%, 0%～0.05% molybdenum, iron is surplus.
2, nickel-chromium-rare earth powder metallurgy high-temperature alloy according to claim 1 is characterized in that described rare earth is that lanthanum, cerium are or/and the scandium element.
3, the nickel-chromium-rare earth powder metallurgy high-temperature alloy of claim 1 is characterized in that in turbo-supercharger the application as the nozzle ring material.
4, nickel-chromium-rare earth powder metallurgy high-temperature alloy according to claim 1, the application in the supercharging blower wear ring.
5, nickel-chromium-rare earth powder metallurgy high-temperature alloy according to claim 1, the application in turbo-supercharger lining, miniature gas turbine nozzle ring, engine valve retainer and valve actuating mechanism high temperature component.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008102436166A CN101435053A (en) | 2008-12-10 | 2008-12-10 | Nickel-chromium-rare earth powder metallurgy high-temperature alloy and use thereof |
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| CNA2008102436166A CN101435053A (en) | 2008-12-10 | 2008-12-10 | Nickel-chromium-rare earth powder metallurgy high-temperature alloy and use thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106185669A (en) * | 2016-08-26 | 2016-12-07 | 常熟中德重机有限公司 | A kind of wear-resisting type hoist roller |
| CN107949650A (en) * | 2016-07-29 | 2018-04-20 | 三菱制钢株式会社 | Heat resisting casting |
| CN110465667A (en) * | 2019-09-25 | 2019-11-19 | 广西科技大学 | A kind of turbocharger vanes and preparation method thereof |
| CN113549845A (en) * | 2021-06-29 | 2021-10-26 | 安徽森拓新材料有限公司 | High-performance powder metallurgy valve seat ring material |
-
2008
- 2008-12-10 CN CNA2008102436166A patent/CN101435053A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107949650A (en) * | 2016-07-29 | 2018-04-20 | 三菱制钢株式会社 | Heat resisting casting |
| CN106185669A (en) * | 2016-08-26 | 2016-12-07 | 常熟中德重机有限公司 | A kind of wear-resisting type hoist roller |
| CN110465667A (en) * | 2019-09-25 | 2019-11-19 | 广西科技大学 | A kind of turbocharger vanes and preparation method thereof |
| CN110465667B (en) * | 2019-09-25 | 2022-04-22 | 广西科技大学 | Turbocharger blade and preparation method thereof |
| CN113549845A (en) * | 2021-06-29 | 2021-10-26 | 安徽森拓新材料有限公司 | High-performance powder metallurgy valve seat ring material |
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Open date: 20090520 |