CN108070788A - A kind of preparation method of niobium alloy doping cast steel material - Google Patents

A kind of preparation method of niobium alloy doping cast steel material Download PDF

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Publication number
CN108070788A
CN108070788A CN201711454120.9A CN201711454120A CN108070788A CN 108070788 A CN108070788 A CN 108070788A CN 201711454120 A CN201711454120 A CN 201711454120A CN 108070788 A CN108070788 A CN 108070788A
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CN
China
Prior art keywords
temperature
niobium alloy
small
heat preservation
cast
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711454120.9A
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Chinese (zh)
Inventor
杜应流
胡学文
窦文哲
孙义玲
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Anhui Yingliu Group Huoshan Casting Co Ltd
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Anhui Yingliu Group Huoshan Casting Co Ltd
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Publication date
Application filed by Anhui Yingliu Group Huoshan Casting Co Ltd filed Critical Anhui Yingliu Group Huoshan Casting Co Ltd
Priority to CN201711454120.9A priority Critical patent/CN108070788A/en
Publication of CN108070788A publication Critical patent/CN108070788A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum

Abstract

The invention discloses a kind of preparation methods of niobium alloy doping cast steel material, including dispensing, casting, heat treatment, the present invention adds micro- niobium alloy on the basis of original material chemical composition, according to experimental verification, when addition is 0.01 0.10%, crystal grain refinement can be reached, improve quenching degree, postpone austenite-ferrite phase transition, promote the effect of low-temperature transformation product generation.So as to improve the impact property of material and stability.

Description

A kind of preparation method of niobium alloy doping cast steel material
Technical field
The invention belongs to casting fields, and in particular to a kind of preparation method of niobium alloy doping cast steel material.
Background technology
Existing cast steel material 23M5M, because the requirement of test block size is especially big, matches, control by this defined chemical composition, After heat treatment, there is impact property and is not sufficiently stable, standard requirement is not achieved, What is more product is by secondary often in production Cannot still it meet after heat treatment.It has seriously affected production cost and product hands over the phase or even causes the situation of product rejection.
The content of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of niobium alloy doping cast steel materials Preparation method.
To achieve the above object, the present invention uses following technical scheme：
A kind of preparation method of niobium alloy doping cast steel material, comprises the following steps：
(1) dispensing：Dispensing is carried out according to the weight percent of following element：
C 0.20-0.25、Si 0-0.60、Mn 1.00-1.50、P 0-0.020、S 0-0.020、Mo 0-0.25、Cr 0-0.30, Ni 0-0.5, Nb 0.01-0.1, remaining be Fe；
(2) cast：Fe is subjected to melting, smelting temperature is 1500-1650 DEG C, adds in C, Si, Mn, P, S, Mo, Cr, Ni, It treats to add in Nb after molten steel fusing 65-70%, stirs evenly, fully melt, be cast into casting；
(3) it is heat-treated：Casting is taken, temperature is raised as 800-850 DEG C using the rate of 110-130 DEG C/h, when heat preservation 2-3 is small, It reenters stove and relays high-temperature of continuing rising as 910-950 DEG C, when heat preservation 1-2 is small, then hardening of coming out of the stove to room temperature is tempered, temperature For 600-630 DEG C, when heat preservation 4.5-6 is small, natural cooling.
Advantages of the present invention：
The present invention adds trace element-niobium alloy on the basis of original material chemical composition, according to experimental verification, when adding Enter amount for 0.01-0.10% when, can reach crystal grain refinement, improve quenching degree, postpone austenite-ferrite phase transition, promote The effect generated into low-temperature transformation product.So as to improve the impact property of material and stability.
Specific embodiment
Embodiment 1
A kind of preparation method of niobium alloy doping cast steel material, comprises the following steps：
(1) dispensing：Dispensing is carried out according to the weight percent of following element：
C 0.21、Si 0.30、Mn 1.30、P 0.010、S 0.010、Mo 0.20、Cr 0.20、Ni 0.3、Nb 0.04th, remaining is Fe；
(2) cast：Fe is subjected to melting, smelting temperature is 1550 DEG C, adds in C, Si, Mn, P, S, Mo, Cr, Ni, treats molten steel Nb is added in after fusing 67%, is stirred evenly, fully melts, is cast into casting；
(3) it is heat-treated：Casting is taken, temperature is raised as 820 DEG C using the rate of 120 DEG C/h, when heat preservation 2-3 is small, is reentered in stove It is 930 DEG C to continue to raise temperature, and when heat preservation 1 is small, then hardening of coming out of the stove to room temperature is tempered, and temperature is 610 DEG C, and heat preservation 5 is small When, natural cooling.
Embodiment 2
A kind of preparation method of niobium alloy doping cast steel material, comprises the following steps：
(1) dispensing：Dispensing is carried out according to the weight percent of following element：
C 0.25、Si 0.60、Mn 1.50、P 0.020、S 0.020、Mo 0.25、Cr 0.30、Ni0.5、Nb 0.1、 Remaining is Fe；
(2) cast：Fe is subjected to melting, smelting temperature is 1650 DEG C, adds in C, Si, Mn, P, S, Mo, Cr, Ni, treats molten steel Nb is added in after fusing 70%, is stirred evenly, fully melts, is cast into casting；
(3) it is heat-treated：Casting is taken, temperature is raised as 850 DEG C using the rate of 130 DEG C/h, when heat preservation 3 is small, reenters stove relaying High-temperature of continuing rising is 950 DEG C, and when heat preservation 2 is small, then hardening of coming out of the stove to room temperature is tempered, and temperature is 630 DEG C, and heat preservation 6 is small When, natural cooling.
Embodiment 3
A kind of preparation method of niobium alloy doping cast steel material, comprises the following steps：
(1) dispensing：Dispensing is carried out according to the weight percent of following element：
C 0.20, Mn 1.00, P 0-0.020, Nb 0.01, remaining be Fe；
(2) cast：Fe is subjected to melting, smelting temperature is 1500 DEG C, adds in C, Mn, P, treats to add after molten steel fusing 65% Enter Nb, stir evenly, fully melt, be cast into casting；
(3) it is heat-treated：Casting is taken, temperature is raised as 800 DEG C using the rate of 110 DEG C/h, when heat preservation 2 is small, reenters stove relaying High-temperature of continuing rising is 910 DEG C, and when heat preservation 1 is small, then hardening of coming out of the stove to room temperature is tempered, and temperature is 600 DEG C, and heat preservation 4.5 is small When, natural cooling.
Embodiment 4
A kind of preparation method of niobium alloy doping cast steel material, comprises the following steps：
(1) dispensing：Dispensing is carried out according to the weight percent of following element：
C 0.22、Si 0.30、Mn 1.03、P 0.012、S 0.013、Mo 0.10、Cr 0.20、Ni 0.4、Nb 0.04th, remaining is Fe；
(2) cast：Fe is subjected to melting, smelting temperature is 1550 DEG C, adds in C, Si, Mn, P, S, Mo, Cr, Ni, treats molten steel Nb is added in after fusing 70%, is stirred evenly, fully melts, is cast into casting；
(3) it is heat-treated：Casting is taken, temperature is raised as 850 DEG C using the rate of 130 DEG C/h, when heat preservation 2 is small, reenters stove relaying High-temperature of continuing rising is 910 DEG C, and when heat preservation 1- is small, then hardening of coming out of the stove to room temperature is tempered, and temperature is 620 DEG C, heat preservation 4.5 Hour, natural cooling.
Embodiment 5
A kind of preparation method of niobium alloy doping cast steel material, which is characterized in that comprise the following steps：
(1) dispensing：Dispensing is carried out according to the weight percent of following element：
C 0.20, Mn 1.50, P 0.020, S 0.020, Mo 0.25, Cr 0.30, Ni 0.5, Nb 0.1, remaining For Fe；
(2) cast：Fe is subjected to melting, smelting temperature is 1650 DEG C, adds in C, Mn, P, S, Mo, Cr, Ni, treats that molten steel melts Nb is added in after changing 70%, is stirred evenly, fully melts, is cast into casting；
(3) it is heat-treated：Casting is taken, temperature is raised as 820 DEG C using the rate of 110 DEG C/h, when heat preservation 2 is small, reenters stove relaying High-temperature of continuing rising is 930 DEG C, and when heat preservation 1 is small, then hardening of coming out of the stove to room temperature is tempered, and temperature is 620 DEG C, and heat preservation 5 is small When, natural cooling.
Performance test：
Rp0.2≥345MPa,
Rm≥550MPa,
A% >=18
Z% >=35；
Contrast experiment：
According to the preparation method in above-described embodiment 1-5, difference part is not add Nb, then to respectively obtain 5 Secondary contrast product is tested：

Claims (1)

1. a kind of preparation method of niobium alloy doping cast steel material, which is characterized in that comprise the following steps：
(1) dispensing：Dispensing is carried out according to the weight percent of following element：
C 0.20-0.25、Si 0-0.60、Mn 1.00-1.50、P 0-0.020、S 0-0.020、Mo 0-0.25、Cr 0- 0.30th, Ni 0-0.5, Nb 0.01-0.1, remaining be Fe；
(2) cast：Fe is subjected to melting, smelting temperature is 1500-1650 DEG C, adds in C, Si, Mn, P, S, Mo, Cr, Ni, treats steel Nb is added in after aqueous fusion 65-70%, is stirred evenly, fully melts, is cast into casting；
(3) it is heat-treated：Casting is taken, temperature is raised as 800-850 DEG C using the rate of 110-130 DEG C/h, when heat preservation 2-3 is small, is reentered Stove relays high-temperature of continuing rising as 910-950 DEG C, and when heat preservation 1-2 is small, then hardening of coming out of the stove to room temperature is tempered, temperature is 600-630 DEG C, when heat preservation 4.5-6 is small, natural cooling.
CN201711454120.9A 2017-12-28 2017-12-28 A kind of preparation method of niobium alloy doping cast steel material Pending CN108070788A (en)

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CN201711454120.9A CN108070788A (en) 2017-12-28 2017-12-28 A kind of preparation method of niobium alloy doping cast steel material

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Application Number Priority Date Filing Date Title
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60208413A (en) * 1984-03-30 1985-10-21 Sanyo Tokushu Seikou Kk Manufacture of carburizing steel
JPS6213557A (en) * 1985-07-12 1987-01-22 Kawasaki Steel Corp Steel for steam injection pipe
JP2007308739A (en) * 2006-05-16 2007-11-29 Nsk Ltd Method for manufacturing rolling bearing, and rolling bearing
CN101096735A (en) * 2006-06-26 2008-01-02 舞阳钢铁有限责任公司 Easy-weld hardening high-strength steel plate and production method thereof
CN102560244A (en) * 2011-12-30 2012-07-11 中信重工机械股份有限公司 Microalloying and heat treatment method for 20MnMo steel
CN106498296A (en) * 2016-11-30 2017-03-15 湖南华菱涟源钢铁有限公司 A kind of manufacture method of yield strength 1100MPa level high-strength steel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60208413A (en) * 1984-03-30 1985-10-21 Sanyo Tokushu Seikou Kk Manufacture of carburizing steel
JPS6213557A (en) * 1985-07-12 1987-01-22 Kawasaki Steel Corp Steel for steam injection pipe
JP2007308739A (en) * 2006-05-16 2007-11-29 Nsk Ltd Method for manufacturing rolling bearing, and rolling bearing
CN101096735A (en) * 2006-06-26 2008-01-02 舞阳钢铁有限责任公司 Easy-weld hardening high-strength steel plate and production method thereof
CN102560244A (en) * 2011-12-30 2012-07-11 中信重工机械股份有限公司 Microalloying and heat treatment method for 20MnMo steel
CN106498296A (en) * 2016-11-30 2017-03-15 湖南华菱涟源钢铁有限公司 A kind of manufacture method of yield strength 1100MPa level high-strength steel

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Application publication date: 20180525

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