CN106350742A - Alloy steel and preparation method thereof - Google Patents

Alloy steel and preparation method thereof Download PDF

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Publication number
CN106350742A
CN106350742A CN201610707676.3A CN201610707676A CN106350742A CN 106350742 A CN106350742 A CN 106350742A CN 201610707676 A CN201610707676 A CN 201610707676A CN 106350742 A CN106350742 A CN 106350742A
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percent
steel alloy
alloy
quenching
alloy steel
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杨雯雯
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/28—Normalising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/009—Pearlite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention relates to alloy steel and a preparation method. The alloy steel is prepared from the following raw materials in percentage by weight: 0.45 to 0.52 percent of carbon, 0.24 to 0.25 percent of silicon, 0.3 to 0.35 percent of manganese, 0.3 to 0.5 percent of chromium, 0.6 to 1.0 percent of nickel, 0.3 percent of aluminum, 0.4 percent of copper, 0.3 percent of tin, 0.02 percent of strontium, 0.3 percent of zinc, 0.03 percent of molybdenum, 0.06 percent of cobalt, 0.08 percent of alum, 0.6 percent of tungsten, 0.0001 percent of titanium, 0.003 percent of boron and the balance of iron. According to the alloy steel disclosed by the invention, a large amount of pearl matrixes are obtained through a normalizing process, and austenite of the alloy steel is changed into lower bainite microstructure through selecting isothermal quenching in a salt bath, so that the hardness, the abrasion performance and the surface heat resistance of alloy are all greatly increased.

Description

A kind of steel alloy and preparation method thereof
Technical field
The present invention relates to metal material, especially relate to a kind of steel alloy and preparation method thereof.
Background technology
Matching with automobile engine part, not only structural strength with functionally have higher requirement, simultaneously in machining Upper no less important, such requirement is not only and meets automobile using upper primary condition, is also that safe and reliable prolongation uses simultaneously The guarantee in life-span.
Search out a kind of raising hardness and anti-wear performance, the steel alloy of the high middle low content of piece surface heat resistance simultaneously Just show is extremely important.Inventor relies on practice for many years and the theoretical empirical of this area, proposes a kind of brand-new steel alloy and joins Side, this formula can solve the existing shortcoming producing auto parts machinery steel.
Content of the invention
It is an object of the invention to provide one kind can overcome hardness, anti-wear performance and table in existing production automobile component steel The not enough steel alloy of face heat resistance.
The present invention seeks to be achieved through the following technical solutions:
A kind of steel alloy, the percentage by weight of this steel alloy is: the carbon of 0.45-0.52%, 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%, 0.3% aluminum, 0.4% copper, 0.3% zinc, 0.03% molybdenum, 0.3% stannum, 0.02% strontium, 0.06% cobalt, 0.08% vitriol, 0.6% tungsten, 0.0001% titanium, The 0.003% balance of ferrum of boron.
The preparation method of described steel alloy, comprises the following steps:
1) carbon for 0.45-0.52% according to percentage by weight, the silicon of 0.24-0.25%, the manganese of 0.3-0.35%, 0.3- 0.5% chromium, the nickel of 0.6-1.0%, 0.3% aluminum, 0.4% copper, 0.3% zinc, 0.03% molybdenum, 0.3% stannum, 0.02% strontium, 0.06% cobalt, 0.08% vitriol, 0.6% tungsten, 0.0001% titanium, the 0.003% balance of ferrum of boron enters Row dispensing；
2) steel alloy is prepared by intermediate frequency furnace melting；
3) steel alloy is carried out normalizing and means of isothermal quenching；Described quenching isothermal hardening in two stages, the first stage adopts With being processed to 500-550 DEG C using 230 ± 20 DEG C of salt bath austemperings, quenching velocity is maintained at 20-25 DEG C of each second；Second-order Section is maintained at 75-80 DEG C for aqueous solution quenching, aqueous solution, and quenching velocity is maintained at 25-30 DEG C of per second, hardening heat to 130- 150℃；Then temper, temperature is 180-220 DEG C and is incubated 2 hours, then natural cooling.
Above-mentioned steel alloy preparation method, its medium alloy steel passes through normalizing and means of isothermal quenching,.So on the one hand obtain relatively High pearlite matrix, thinning microstructure, improves hardness and the anti-wear performance of material；On the other hand, by being maintained at lower shellfish for a long time The isothermal hardening of family name's body transition zone, makes alloy realize the isothermal transformation of austenite, obtains lower bainite tissue.
The invention has the beneficial effects as follows:
Substantial amounts of pearlized matrix is obtained by normalizing procedure, and by the salt bath austempering of 230 ± 20 DEG C of selection, makes conjunction The austenite of Jin Gang is transformed into lower bainite tissue so that alloy rigidity, anti-wear performance and Thermal Resistant Surface performance all obtain very big Raising.
Specific embodiment
To explain the present invention below by way of specific embodiment it should be appreciated that the specific embodiment of the present invention is only capable of using Come to explain the present invention and can not be for being construed to limitation of the present invention.
Embodiment one
A kind of steel alloy, the percentage by weight of this steel alloy is: 0.45% carbon, 0.24% silicon, 0.3% manganese, 0.3% chromium, 0.6% nickel, 0.3% aluminum, 0.4% copper, 0.3% zinc, 0.03% molybdenum, 0.3% stannum, 0.02% Strontium, 0.06% cobalt, 0.08% vitriol, 0.6% tungsten, 0.0001% titanium, the 0.003% balance of ferrum of boron.
The preparation method of described steel alloy, comprises the following steps:
1) carbon for 0.45-0.52% according to percentage by weight, the silicon of 0.24-0.25%, the manganese of 0.3-0.35%, 0.3- 0.5% chromium, the nickel of 0.6-1.0%, 0.3% aluminum, 0.4% copper, 0.3% zinc, 0.03% molybdenum, 0.06% cobalt, 0.08% vitriol, 0.6% tungsten, 0.0001% titanium, the 0.003% balance of ferrum of boron carries out dispensing；
2) steel alloy is prepared by intermediate frequency furnace melting；
3) steel alloy is carried out normalizing and means of isothermal quenching；Described quenching isothermal hardening in two stages, the first stage adopts With being processed to 500-550 DEG C using 230 ± 20 DEG C of salt bath austemperings, quenching velocity is maintained at 20-25 DEG C of each second；Second-order Section is maintained at 75-80 DEG C for aqueous solution quenching, aqueous solution, and quenching velocity is maintained at 25-30 DEG C of per second, hardening heat to 130- 150℃；Then temper, temperature is 180-220 DEG C and is incubated 2 hours, then natural cooling.
Above-mentioned steel alloy preparation method, its medium alloy steel passes through normalizing and means of isothermal quenching,.So on the one hand obtain relatively High pearlite matrix, thinning microstructure, improves hardness and the anti-wear performance of material；On the other hand, by being maintained at lower shellfish for a long time The isothermal hardening of family name's body transition zone, makes alloy realize the isothermal transformation of austenite, obtains lower bainite tissue.
The cast alloy steel curved beam obtaining is done with metallographic structure observe, find that it is organized as pearlitic structrure and lower bayesian group Knit.
The alloy obtaining is carried out with hardness determination, hardness determination value hrc55.
In the following examples of the present invention, the cast alloy steel curved beam obtaining is done with metallographic structure and observes, all find it It is organized as pearlitic structrure and lower bayesian tissue.
The alloy obtaining is carried out with hardness determination, hardness determination value hrc54-57.
In the following examples of the present invention, the preparation method all same of steel alloy, different is only low-alloy steel The composition of each element, therefore below in an example, only describe steel alloy each element percentage by weight.
Embodiment two
A kind of steel alloy, the percentage by weight of this steel alloy is: 0.52% carbon, 0.25% silicon, 0.35% manganese, 0.5% chromium, 1.0% nickel, 0.3% aluminum, 0.4% copper, 0.3% zinc, 0.03% molybdenum, 0.3% stannum, 0.02% Strontium, 0.06% cobalt, 0.08% vitriol, 0.6% tungsten, 0.0001% titanium, the 0.003% balance of ferrum of boron.
The alloy obtaining is carried out with hardness determination, hardness determination value hrc57.
Embodiment three
A kind of steel alloy, the percentage by weight of this steel alloy is: 0.50% carbon, 0.24% silicon, 0.32% manganese, 0.4% chromium, 0.8% nickel, 0.3% aluminum, 0.4% copper, 0.3% zinc, 0.03% molybdenum, 0.3% stannum, 0.02% Strontium, 0.06% cobalt, 0.08% rock, 0.6% tungsten, 0.0001% titanium, the 0.003% balance of ferrum of boron.
According to the manufacture process manufacture of embodiment one, the alloy obtaining is carried out with hardness determination, hardness determination value hrc62.
The cast alloy steel curved beam obtaining is done with metallographic structure observe, find its tissue most of for pearlitic structrure and under Bayesian is organized.
When for manufacture automobile brake gear part when, preferably this embodiment.
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 Various corresponding changes are made according to the present invention, but these corresponding changes all should belong within scope of the claimed of the present invention.

Claims (2)

1. a kind of steel alloy it is characterised in that: the percentage by weight of this steel alloy is, the carbon of 0.45-0.52%, 0.24- 0.25% silicon, the manganese of 0.3-0.35%, the chromium of 0.3-0.5%, the nickel of 0.6-1.0%, 0.3% aluminum, 0.4% copper, 0.3% zinc, 0.03% molybdenum, 0.3% stannum, 0.02% strontium, 0.06% cobalt, 0.08% rock, 0.6% tungsten, 0.0001% titanium, the 0.003% balance of ferrum of boron.
2. a kind of preparation method of steel alloy, comprises the following steps:
1) carbon for 0.45-0.52% according to percentage by weight, the silicon of 0.24-0.25%, the manganese of 0.3-0.35%, 0.3- 0.5% chromium, the nickel of 0.6-1.0%, 0.3% aluminum, 0.4% copper, 0.3% zinc, 0.03% molybdenum, 0.3% stannum, 0.02% strontium, 0.06% cobalt, 0.08% vitriol, 0.6% tungsten, 0.0001% titanium, the 0.003% balance of ferrum of boron enters Row dispensing；
2) steel alloy is prepared by intermediate frequency furnace melting；
3) steel alloy is carried out normalizing and means of isothermal quenching；Described quenching isothermal hardening in two stages, the first stage is using adopting Processed to 500-550 DEG C with 230 ± 20 DEG C of salt bath austemperings, quenching velocity is maintained at 20-25 DEG C of each second；Second stage is Aqueous solution quenches, and aqueous solution is maintained at 75-80 DEG C, and quenching velocity is maintained at 25-30 DEG C of per second, hardening heat to 130-150 DEG C； Then temper, temperature is 180-220 DEG C and is incubated 2 hours, then natural cooling.
CN201610707676.3A 2016-08-22 2016-08-22 Alloy steel and preparation method thereof Pending CN106350742A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107747055A (en) * 2017-09-28 2018-03-02 江苏晶王新材料科技有限公司 A kind of wear-resistant light metal material

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102994909A (en) * 2012-11-26 2013-03-27 俞虹 Alloy steel material and preparation method thereof
CN103014548A (en) * 2012-11-26 2013-04-03 姚芸 Alloy steel and preparation method thereof
CN104313489A (en) * 2014-10-20 2015-01-28 张超 Alloy steel material and preparation method thereof
CN104313490A (en) * 2014-10-20 2015-01-28 张超 Alloy steel material
CN104328355A (en) * 2014-10-20 2015-02-04 张超 Preparation method of alloy steel material
CN105256250A (en) * 2015-11-10 2016-01-20 俞虹 Alloy steel and preparing method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102994909A (en) * 2012-11-26 2013-03-27 俞虹 Alloy steel material and preparation method thereof
CN103014548A (en) * 2012-11-26 2013-04-03 姚芸 Alloy steel and preparation method thereof
CN104313489A (en) * 2014-10-20 2015-01-28 张超 Alloy steel material and preparation method thereof
CN104313490A (en) * 2014-10-20 2015-01-28 张超 Alloy steel material
CN104328355A (en) * 2014-10-20 2015-02-04 张超 Preparation method of alloy steel material
CN105256250A (en) * 2015-11-10 2016-01-20 俞虹 Alloy steel and preparing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107747055A (en) * 2017-09-28 2018-03-02 江苏晶王新材料科技有限公司 A kind of wear-resistant light metal material

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Application publication date: 20170125