CN106636891A - Preparation method of ball milling cast iron for shock resisting railway steel rail - Google Patents

Preparation method of ball milling cast iron for shock resisting railway steel rail Download PDF

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Publication number
CN106636891A
CN106636891A CN201611010072.XA CN201611010072A CN106636891A CN 106636891 A CN106636891 A CN 106636891A CN 201611010072 A CN201611010072 A CN 201611010072A CN 106636891 A CN106636891 A CN 106636891A
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CN
China
Prior art keywords
rail
preparation
sub
cast iron
forging
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
CN201611010072.XA
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Chinese (zh)
Inventor
王卫远
夏明星
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Maanshan Yinding Machinery Manufacturing Co Ltd
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Maanshan Yinding Machinery Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maanshan Yinding Machinery Manufacturing Co Ltd filed Critical Maanshan Yinding Machinery Manufacturing Co Ltd
Priority to CN201611010072.XA priority Critical patent/CN106636891A/en
Publication of CN106636891A publication Critical patent/CN106636891A/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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
    • 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
    • C22C38/008—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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
    • 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

Abstract

The invention discloses a preparation method of ball milling cast iron for a shock resisting railway steel rail. The preparation method comprises the following process steps: a casting procedure: a wind power main shaft comprises the following alloy components in percentage by weight: 2.2-2.5% of C, 0.8-1.2% of Si, 0.55-0.75% of Mo, 0.008-0.012% of P, 0.004-0.012% of S, 0.8-1.2% of Cr, 0.05-0.12% of W, 0.2-0.4% of Co, 0.03-0.12% of Bi, 0.15-0.21% of Ta, 0.18-0.25% of heavy rare earth, 0.2-0.4% of Cu, 0.1-0.3% of Ca, 0.04-0.07% of Sn, and the balance of iron. The preparation method can totally achieve related ultrasonic flaw detection requirements and grain size requirements by ultrasonic flaw detection under long-time low-frequency vibration influence, and obviously improves the production efficiency.

Description

Antidetonation railway track nodular cast iron preparation method
Technical field
The present invention relates to railway track field, particularly belongs to antidetonation railway track nodular cast iron preparation method.
Background technology
With development of the railway in nation-building, the scope of railway track application is more and more extensive, and manufacture species is a lot, It is required that have that the manufacturing cycle is short, little manufacture difficulty and the characteristics of low cost, and generally adopt in prior art method high cost, Cycle is long, the advantage of lower cost of alloy material, therefore is used widely such mould applications are manufactured.But simple metal The requirement in terms of such as plasticity, hardness, intensity can not be met, therefore be usually added into alloying element to improve its Physical Mechanical Energy.
Therefore, to solve the above problems, a kind of new skill is provided with nodular cast iron preparation method for antidetonation railway track Art scheme is very necessary.
The content of the invention
It is an object of the invention to provide a kind of antidetonation railway track nodular cast iron preparation method, Jing ultrasonic examinations inspection Survey, under the influence of long-term low-frequency vibration, be fully able to reach the ultrasonic examination requirement of correlation and grain size is required, production efficiency is bright It is aobvious to improve.
Technical scheme is as follows：
A kind of antidetonation railway track nodular cast iron preparation method, includes following processing step：
1）, casting process, each alloying component and percentage by weight are in the alloy molten steel：C1.3 ~ 1.6%, Si1.2 ~ 1.4%, Mo0.14 ~ 0.28%, P≤0.012%, S≤0.007%, Cr1.3 ~ 1.5%, W0.15 ~ 0.23%, Co0.12 ~ 0.22%, B0.03 ~ 0.06%, Ti0.05 ~ 0.09%, Re0.1 ~ 0.2%, Mn1.2 ~ 1.4%, Sn0.06 ~ 0.08%, balance of ferrum；
2）, is heated to by 550-570 DEG C and 1-1.2h is incubated the rail of cast form, oil cooling is reheated to 340 to after 90 DEG C DEG C -370 DEG C of temperature range is simultaneously incubated 0.8-1.2h, afterwards water-cooled, after temper, is incubated 0.3-0.5h, then sprays Fog cooling is processed；
3）Forging process, will be heated within the temperature range of 900 DEG C -1100 DEG C through the rail of heat treatment, and rail is put into into punching Sub-material is carried out on the sub-material mould of bed, the good rail of sub-material is flattened, and the rail after flattening is put into forging press, the temperature of forging press 980-1020 DEG C, forge pressure 2500-2900T.
The forging process, will be heated within the temperature range of 1000 DEG C through the rail of heat treatment, and rail is put into into punching Sub-material is carried out on the sub-material mould of bed, the good rail of sub-material is flattened, and the rail after flattening is put into forging press, the temperature of forging press 1000 DEG C, forge pressure 2700T.
The railway track Jing ultrasonic examinations detection of present invention production, the internal flaw of material has obtained effective elimination, complete The ultrasonic examination requirement and grain size that correlation all can enough be reached requires that production efficiency is significantly improved, and long-term low-frequency vibration affects Under, it is fully able to reach the ultrasonic examination requirement of correlation and grain size is required, production efficiency is significantly improved.
Specific embodiment
Embodiment 1:
A kind of antidetonation railway track nodular cast iron preparation method, includes following processing step：
1）, casting process, each alloying component and percentage by weight are in the alloy molten steel：C1.45%, Si1.3%, Mo0.21%, P 0.01%, S0.005%, Cr1.4%, W0.19%, Co0.17%, B0.045%, Ti0.07%, Re0.15%, Mn1.3%, Sn0.07%, it is remaining Measure as ferrum；
2）, is heated to by 560 DEG C and 1.1h is incubated the rail of cast form, oil cooling is reheated to 355 DEG C of temperature to after 90 DEG C Degree scope is simultaneously incubated 1h, afterwards water-cooled, after temper, is incubated 0.4h, and then spray cooling is processed；
3）Forging process, will be heated within the temperature range of 1000 DEG C through the rail of heat treatment, and rail is put into into dividing for punch press Sub-material is carried out on material mould, the good rail of sub-material is flattened, and the rail after flattening is put into forging press, the temperature 1000 of forging press DEG C, forge pressure 2700T.
Present invention manufacture railway track nodular cast iron test data：Tensile strength sigma b >=1020MPa；Yield strength σ0.2 ≥910MPa；Elongation percentage δ5(‰) ≥3.3；Contraction percentage of area ψ (‰) >=20.2；Room temperature impact toughness α ku (42 DEG C) >= 71J/cm2；Low-temperature impact toughness σ ku (- 30 DEG C) >=31.5J/cm2；Hardness HRC40-42.

Claims (2)

1. a kind of antidetonation railway track nodular cast iron preparation method, it is characterised in that include following processing step：
1）, casting process, each alloying component and percentage by weight are in the alloy molten steel：C1.3 ~ 1.6%, Si1.2 ~ 1.4%, Mo0.14 ~ 0.28%, P≤0.012%, S≤0.007%, Cr1.3 ~ 1.5%, W0.15 ~ 0.23%, Co0.12 ~ 0.22%, B0.03 ~ 0.06%, Ti0.05 ~ 0.09%, Re0.1 ~ 0.2%, Mn1.2 ~ 1.4%, Sn0.06 ~ 0.08%, balance of ferrum；
2）, is heated to by 550-570 DEG C and 1-1.2h is incubated the rail of cast form, oil cooling is reheated to 340 to after 90 DEG C DEG C -370 DEG C of temperature range is simultaneously incubated 0.8-1.2h, afterwards water-cooled, after temper, is incubated 0.3-0.5h, then sprays Fog cooling is processed；
3）Forging process, will be heated within the temperature range of 900 DEG C -1100 DEG C through the rail of heat treatment, and rail is put into into punching Sub-material is carried out on the sub-material mould of bed, the good rail of sub-material is flattened, and the rail after flattening is put into forging press, the temperature of forging press 980-1020 DEG C, forge pressure 2500-2900T.
2. antidetonation railway track nodular cast iron preparation method according to claim 1, it is characterised in that the forging work Sequence, will be heated within the temperature range of 1000 DEG C through the rail of heat treatment, and rail is put on the sub-material mould of punch press to be carried out point Material, the good rail of sub-material is flattened, and the rail after flattening is put into forging press, 1000 DEG C of the temperature of forging press, forge pressure 2700T。
CN201611010072.XA 2016-11-17 2016-11-17 Preparation method of ball milling cast iron for shock resisting railway steel rail Pending CN106636891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611010072.XA CN106636891A (en) 2016-11-17 2016-11-17 Preparation method of ball milling cast iron for shock resisting railway steel rail

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611010072.XA CN106636891A (en) 2016-11-17 2016-11-17 Preparation method of ball milling cast iron for shock resisting railway steel rail

Publications (1)

Publication Number Publication Date
CN106636891A true CN106636891A (en) 2017-05-10

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1185359A (en) * 1996-12-19 1998-06-24 福斯特·阿尔帕钢轨股份有限公司 Formed rolled piece and mfg. method thereof
CN1522311A (en) * 2002-04-05 2004-08-18 �ձ�������ʽ���� Pealite based rail excellent in wear resistance and ductility and method for production thereof
CN101586216B (en) * 2009-06-25 2011-04-06 莱芜钢铁集团有限公司 Ultra-high strength and toughness bainitic steel and manufacturing method thereof
CN102886641A (en) * 2012-09-11 2013-01-23 昌利锻造有限公司 Method for forging crawler belt plate
CN103846632A (en) * 2014-02-11 2014-06-11 马鞍山市恒毅机械制造有限公司 Forging method for driving screw bevel gear forge piece of automotive rear axle
CN105057527A (en) * 2015-07-20 2015-11-18 安徽蓝博旺机械集团液压流体机械有限责任公司 Method for forging pump body insert of fuel feed pump
CN105562572A (en) * 2015-12-28 2016-05-11 合肥中澜新材料科技有限公司 Forging method for shifting fork used for lathe
CN106103772A (en) * 2014-03-24 2016-11-09 杰富意钢铁株式会社 Rail and manufacture method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1185359A (en) * 1996-12-19 1998-06-24 福斯特·阿尔帕钢轨股份有限公司 Formed rolled piece and mfg. method thereof
CN1522311A (en) * 2002-04-05 2004-08-18 �ձ�������ʽ���� Pealite based rail excellent in wear resistance and ductility and method for production thereof
CN101586216B (en) * 2009-06-25 2011-04-06 莱芜钢铁集团有限公司 Ultra-high strength and toughness bainitic steel and manufacturing method thereof
CN102886641A (en) * 2012-09-11 2013-01-23 昌利锻造有限公司 Method for forging crawler belt plate
CN103846632A (en) * 2014-02-11 2014-06-11 马鞍山市恒毅机械制造有限公司 Forging method for driving screw bevel gear forge piece of automotive rear axle
CN106103772A (en) * 2014-03-24 2016-11-09 杰富意钢铁株式会社 Rail and manufacture method thereof
CN105057527A (en) * 2015-07-20 2015-11-18 安徽蓝博旺机械集团液压流体机械有限责任公司 Method for forging pump body insert of fuel feed pump
CN105562572A (en) * 2015-12-28 2016-05-11 合肥中澜新材料科技有限公司 Forging method for shifting fork used for lathe

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