CN104313509A - Alloy with high surface heat resistance - Google Patents
Alloy with high surface heat resistance Download PDFInfo
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- CN104313509A CN104313509A CN201410562865.7A CN201410562865A CN104313509A CN 104313509 A CN104313509 A CN 104313509A CN 201410562865 A CN201410562865 A CN 201410562865A CN 104313509 A CN104313509 A CN 104313509A
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Abstract
The invention relates to an alloy with high surface heat resistance. The alloy steel comprises the following components by weight percent: 0.45-0.52% of carbon, 0.01-0.03% of graphite, 0.24-0.25% of silicon, 0.3-0.35% of manganese, 0.3-0.5% of chromium, 0.6-1.0% of nickel, 0.01-0.03% of molybdenum, 0.04-0.06% of cobalt, 0.001-0.003% of tellurium, 0.001-0.003% of nitrogen, 0.001-0.003% of neodymium, 0.003-0.005% of zirconium, 0.03-0.08% of vanadium, 0.2-0.6% of tungsten, 0.0001-0.0005% of titanium, 0.003-0.005% of boron and the balance of iron. The alloy has the beneficial effects that austenite of the alloy steel is transformed into a lower bainite structure by obtaining plenty of pearlitic matrices by virtue of a normalizing process and selecting salt bath isothermal quenching, so that the hardness, wear resistance and surface heat resistance of the alloy are greatly improved.
Description
Technical field
The present invention relates to metallic substance, especially relate to the alloy that a kind of Thermal Resistant Surface performance is high.
Background technology
Matching with automobile engine parts, not only structural strength with functionally have higher requirement, simultaneously no less important in mechanical workout, the primary condition meeting automobile and use is not only in such requirement, is also the safe and reliable guarantee increased the service life simultaneously.
Search out a kind of raising hardness and wear resisting property, the steel alloy of the middle low levels that piece surface resistance toheat is high is extremely important with regard to what show simultaneously.Contriver relies on practice for many years and the theoretical empirical of this area, proposes a kind of brand-new steel alloy formula, and this formula can solve the shortcoming of existing production auto parts machinery steel.
Summary of the invention
The object of this invention is to provide a kind of steel alloy that can overcome hardness, wear resisting property and Thermal Resistant Surface performance deficiency in existing production trolley part steel.
The present invention seeks to be achieved through the following technical solutions:
The alloy that a kind of Thermal Resistant Surface performance is high, be made up of following by weight percentage, the carbon of 0.45-0.52%, the graphite of 0.01-0.03%, the silicon of 0.24-0.25%, the manganese of 0.3-0.35%, the chromium of 0.3-0.5%, the nickel of 0.6-1.0%, the molybdenum of 0.01-0.03%, the cobalt of 0.04-0.06%, the tellurium of 0.001-0.003%, the nitrogen of 0.001-0.003%, the neodymium of 0.001-0.003%, the zirconium of 0.003-0.005%, the vanadium of 0.03-0.08%, the tungsten of 0.2-0.6%, the titanium of 0.0001-0.0005%, the boron surplus of 0.003-0.005% is iron.
Above-mentioned alloy preparation method, its interalloy by normalizing and means of isothermal quenching.Such one side obtains higher pearlite matrix, thinning microstructure, improves hardness and the wear resisting property of material; On the other hand, by remaining on the isothermal quenching in Lower Bainite Transformation district for a long time, making alloy realize austenitic isothermal transformation, obtaining lower bainite tissue.
The invention has the beneficial effects as follows:
The present invention is by preparation process before casting, and temperature-fall period, can suppress the grain growing speed of some element in alloy, makes the arrangement organized in alloy even.
By the pearly-lustre matrix that normalizing Procedure Acquisition is a large amount of, and pass through the salt bath austempering of selection 230 ± 20 DEG C, make the austenitic transformation of steel alloy become lower bainite tissue, alloy rigidity, wear resisting property and Thermal Resistant Surface performance are all greatly improved.
Embodiment
Explain the present invention below by way of specific embodiment, should be understood that, specific embodiments of the invention only can be used for explaining the present invention and can not being used for being interpreted as limitation of the present invention.
The alloy that a kind of Thermal Resistant Surface performance is high, be made up of following by weight percentage, the carbon of 0.45-0.52%, the graphite of 0.01-0.03%, the silicon of 0.24-0.25%, the manganese of 0.3-0.35%, the chromium of 0.3-0.5%, the nickel of 0.6-1.0%, the molybdenum of 0.01-0.03%, the cobalt of 0.04-0.06%, the tellurium of 0.001-0.003%, the nitrogen of 0.001-0.003%, the neodymium of 0.001-0.003%, the zirconium of 0.003-0.005%, the vanadium of 0.03-0.08%, the tungsten of 0.2-0.6%, the titanium of 0.0001-0.0005%, the boron surplus of 0.003-0.005% is iron.
The alloy preparation method that Thermal Resistant Surface performance is high, comprises the following steps:
1) prepare burden;
2) steel alloy is prepared by medium-frequency induction furnace melting; Before casting, constant temperature is carried out to molten steel and breeds 30-60 minute, then with at least 30 DEG C/min of cooling 200-300 DEG C, and then be warming up to and breed temperature, and constant temperature 30-60 minute, cast;
3) steel alloy is carried out normalizing and means of isothermal quenching; Described quenching isothermal quenching in two stages, the first stage adopts employing 230 ± 20 DEG C of salt bath austempering process to 500-550 DEG C, and quenching velocity remains on 20-25 DEG C of p.s.; Subordinate phase is aqueous solution quench, and the aqueous solution remains on 75-80 DEG C, quenching velocity remain on 25-30 DEG C per second, quenching temperature is to 130-150 DEG C; Then temper, tempering temperature is 180-220 DEG C and is incubated 2 hours, then naturally cooling.
Described batching is, is the graphite of the carbon of 0.45-0.52%, 0.01-0.03% according to weight percent, the silicon of 0.24-0.25%, the manganese of 0.3-0.35%, the chromium of 0.3-0.5%, the nickel of 0.6-1.0%, the molybdenum of 0.01-0.03%, the cobalt of 0.04-0.06%, the tellurium of 0.001-0.003%, the nitrogen of 0.001-0.003%, the neodymium of 0.001-0.003%, the zirconium of 0.003-0.005%, the vanadium of 0.03-0.08%, the tungsten of 0.2-0.6%, the titanium of 0.0001-0.0005%, the boron surplus of 0.003-0.005% is iron
Above-mentioned alloy preparation method, its Medium Alloy Steel by normalizing and means of isothermal quenching.Such one side obtains higher pearlite matrix, thinning microstructure, improves hardness and the wear resisting property of material; On the other hand, by remaining on the isothermal quenching in Lower Bainite Transformation district for a long time, making alloy realize austenitic isothermal transformation, obtaining lower bainite tissue.
In following examples of the application, be only that the composition of alloy is had any different, remaining step is identical, therefore just no longer carries out repeat specification.
Embodiment 1
The alloy that Thermal Resistant Surface performance is high, is made up of following by weight percentage, the carbon of 0.45%, the graphite of 0.01%, the silicon of 0.24%, the manganese of 0.3%, the chromium of 0.3%, the nickel of 0.6%, the molybdenum of 0.01%, the cobalt of 0.04%, the tellurium of 0.001%, the nitrogen of 0.001%, the neodymium of 0.001%, the zirconium of 0.003%, the vanadium of 0.03%, the tungsten of 0.2%, the titanium of 0.0001%, the boron surplus of 0.003% is iron.
Embodiment two
The alloy that Thermal Resistant Surface performance is high, is made up of following by weight percentage, the carbon of 0.52%, the graphite of 0.03%, the silicon of 0.25%, the manganese of 0.35%, the chromium of 0.5%, the nickel of 1.0%, the molybdenum of 0.03%, the cobalt of 0.06%, the tellurium of 0.003%, the nitrogen of 0.003%, the neodymium of 0.003%, the zirconium of 0.005%, the vanadium of 0.08%, the tungsten of 0.6%, the titanium of 0.0005%, the boron surplus of 0.005% is iron.
Embodiment three
The alloy that Thermal Resistant Surface performance is high, is made up of following by weight percentage, the carbon of 0.50%, the graphite of 0.015%, the silicon of 0.245%, the manganese of 0.32%, the chromium of 0.35%, the nickel of 0.8%, the molybdenum of 0.022%, the cobalt of 0.05%, the tellurium of 0.002%, the nitrogen of 0.0015%, the neodymium of 0.002%, the zirconium of 0.0045%, the vanadium of 0.05%, the tungsten of 0.3%, the titanium of 0.00025%, the boron surplus of 0.0035% is iron.
The present invention is not limited to above-mentioned specific embodiment, and in the case of without departing from the present invention, those skilled in the art can make various corresponding change according to the present invention, but these corresponding changes all should belong within the claimed scope of the present invention.
Claims (1)
1. the alloy that a Thermal Resistant Surface performance is high, it is characterized in that: be made up of following by weight percentage, the carbon of 0.45-0.52%, the graphite of 0.01-0.03%, the silicon of 0.24-0.25%, the manganese of 0.3-0.35%, the chromium of 0.3-0.5%, the nickel of 0.6-1.0%, the molybdenum of 0.01-0.03%, the cobalt of 0.04-0.06%, the tellurium of 0.001-0.003%, the nitrogen of 0.001-0.003%, the neodymium of 0.001-0.003%, the zirconium of 0.003-0.005%, the vanadium of 0.03-0.08%, the tungsten of 0.2-0.6%, the titanium of 0.0001-0.0005%, the boron surplus of 0.003-0.005% is iron.
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| CN201410562865.7A CN104313509A (en) | 2014-10-20 | 2014-10-20 | Alloy with high surface heat resistance |
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| CN201410562865.7A CN104313509A (en) | 2014-10-20 | 2014-10-20 | Alloy with high surface heat resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313508A (en) * | 2014-10-20 | 2015-01-28 | 郭芙 | Alloy with high surface heat resistance and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030143105A1 (en) * | 2001-11-22 | 2003-07-31 | Babak Bahar | Super-austenitic stainless steel |
| CN1807672A (en) * | 2006-02-17 | 2006-07-26 | 太原钢铁(集团)有限公司 | Middle content chromium copper, iron-containing antiseptic anticreas rustless steel sheet belt and its production method |
| US20100008813A1 (en) * | 2006-10-02 | 2010-01-14 | Dmitriy Vladimirovich SAVKIN | Hot and corrosion-resistant steel |
| CN104313508A (en) * | 2014-10-20 | 2015-01-28 | 郭芙 | Alloy with high surface heat resistance and preparation method thereof |
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2014
- 2014-10-20 CN CN201410562865.7A patent/CN104313509A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030143105A1 (en) * | 2001-11-22 | 2003-07-31 | Babak Bahar | Super-austenitic stainless steel |
| CN1807672A (en) * | 2006-02-17 | 2006-07-26 | 太原钢铁(集团)有限公司 | Middle content chromium copper, iron-containing antiseptic anticreas rustless steel sheet belt and its production method |
| US20100008813A1 (en) * | 2006-10-02 | 2010-01-14 | Dmitriy Vladimirovich SAVKIN | Hot and corrosion-resistant steel |
| CN104313508A (en) * | 2014-10-20 | 2015-01-28 | 郭芙 | Alloy with high surface heat resistance and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313508A (en) * | 2014-10-20 | 2015-01-28 | 郭芙 | Alloy with high surface heat resistance and preparation method thereof |
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Application publication date: 20150128 |