CN106756459A - A kind of heat treatment method of cast iron transh pump - Google Patents

A kind of heat treatment method of cast iron transh pump Download PDF

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Publication number
CN106756459A
CN106756459A CN201611138532.7A CN201611138532A CN106756459A CN 106756459 A CN106756459 A CN 106756459A CN 201611138532 A CN201611138532 A CN 201611138532A CN 106756459 A CN106756459 A CN 106756459A
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CN
China
Prior art keywords
iron
cast iron
cast
casting
transh pump
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Pending
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CN201611138532.7A
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Chinese (zh)
Inventor
陆丽文
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Guangxi University
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Guangxi University
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Priority to CN201611138532.7A priority Critical patent/CN106756459A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or 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
    • C21D5/00—Heat treatments of cast-iron
    • 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
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/08—Making cast-iron alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/06—Cast-iron alloys containing chromium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

The invention discloses a kind of heat treatment method of cast iron transh pump, the percentage by weight of described its composition of cast iron transh pump is C2.8~3.2%, Si0.3~0.8%, Mn0.6~0.9%, P ＜ 0.1%, S ＜ 0.06%, Cr14~16%, Mo2.5~3.0%, balance of Fe.Described method includes dispensing, preheating, melting, both analysis, final deoxidizing, inoculation, cast, austenitizing treatment.The method casting technique is simple, by controlling the addition of Chromium in Chromium Cast Iron and molybdenum and carrying out austenitizing treatment, improves rich chromium cast iron transh pump wear resistence.

Description

A kind of heat treatment method of cast iron transh pump
Technical field
The present invention relates to the production technical field of ferrous metal, especially a kind of heat treatment method of cast iron transh pump.
Background technology
All have an impact to the intensity of cast iron, hardness, impact property, wearability and corrosion resistance etc. due to closing element, thus Adding alloying element can make cast iron obtain suitable combination property.Wearability and toughness the aspect ratio of martensitic alloy antifriction cast iron Common antifriction cast iron will get well, in order to the quenching degree for improving cast iron makes matrix be transformed into martensite in as cast condition, in low-carbon cast iron It is middle to add chromium and molybdenum, martensite can be obtained in as cast condition using chromium, molybdenum alloy element, cast out Abrasion Resistant High Chromium Cast Iron transh pump.Separately Outward in order to improve Abrasion Resistant High Chromium Cast Iron transh pump hardness, austenitizing treatment need to be carried out.
The content of the invention
The technical problem solved needed for of the invention is to provide a kind of heat treatment method of cast iron transh pump.By controlling cast iron The addition of middle chromium and molybdenum and carry out austenitizing treatment, improve rich chromium cast iron wear resistence.
The technical solution adopted for the present invention to solve the technical problems is：Including following several steps：
The first step：Dispensing：By steel scrap, foundry returns, the pig iron, ferrochrome, molybdenum-iron press C2.8~3.2%, Si0.3~0.8%, Mn0.6~ 0.9%th, P ＜ 0.1%, S ＜ 0.06%, Cr14~16%, Mo2.5~3.0%, the mode of balance of Fe percentage by weights carry out dispensing；
Second step：Preheating：Will optimize calculate steel scrap, foundry returns, the pig iron, ferrochrome, molybdenum-iron input intermediate frequency furnace in carry out Preheating；
3rd step：Melting：After by the steel scrap in intermediate frequency furnace, foundry returns, the pig iron, ferrochrome fusing, its quantity is put into for furnace charge 15~25%, composition carries out pre-deoxidation for the deoxidier of lime 60%+ fluorites 40%, then puts into the ferrosilicon of baking treatment and obtain iron liquid；
4th step：Both analysis：Take iron liquid casting sample quickly to be analyzed, chemical composition is adjusted according to analysis result；
5th step：Final deoxidizing：Bonded hard ferrite magnet is warming up to 1490~1650 DEG C, the aluminium that its quantity is iron liquid 0.1~0.3% is put into Carry out final deoxidizing；
6th step：Inoculation：Iron liquid carries out inoculation when flowing to casting ladle from intermediate frequency furnace, and it is iron liquid amount to add its quantity 0.3~0.5% inovulant, the granularity of inovulant is 2~6mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When bonded hard ferrite magnet is down to 1510~1580 DEG C, poured into a mould, obtained cast iron transh pump casting；
8th step：Austenitizing treatment.
In described 8th step austenitizing treatment, below 200 DEG C of casting ﹤ is fitted into heat-treatment furnace, with 115~220 DEG C/ The speed of h is warming up to 870~1160 DEG C, and 2~4h of insulation is quickly cooled to less than 300 DEG C air coolings of coming out of the stove, and obtains cast iron transh pump zero Part.
The beneficial effects of the invention are as follows：Casting technique is simple, by controlling the addition of Chromium in Chromium Cast Iron and molybdenum and carrying out Austria The treatment of family name's bodyization, improves rich chromium cast iron transh pump wear resistence.
Specific embodiment
Embodiment 1：
A kind of heat treatment method of cast iron transh pump of this example, including following several steps：
The first step：Dispensing：Steel scrap, foundry returns, the pig iron, ferrochrome, molybdenum-iron are pressed into C2.8%, Si0.3%, Mn0.6%, P ＜ 0.1%, S ＜ 0.06%th, Cr14%, Mo2.5%, the mode of balance of Fe percentage by weights carry out dispensing；
Second step：Preheating：Will optimize calculate steel scrap, foundry returns, the pig iron, ferrochrome, molybdenum-iron input intermediate frequency furnace in carry out Preheating；
3rd step：Melting：After by the steel scrap in intermediate frequency furnace, foundry returns, the pig iron, ferrochrome fusing, its quantity is put into for furnace charge 15%, composition carries out pre-deoxidation for the deoxidier of lime 60%+ fluorites 40%, then puts into the ferrosilicon of baking treatment and obtain iron liquid；
4th step：Both analysis：Take iron liquid casting sample quickly to be analyzed, chemical composition is adjusted according to analysis result；
5th step：Final deoxidizing：Bonded hard ferrite magnet is warming up to 1490 DEG C, putting into the aluminium that its quantity is iron liquid 0.1% carries out final deoxidizing；
6th step：Inoculation：Iron liquid carries out inoculation when flowing to casting ladle from intermediate frequency furnace, and it is iron liquid amount to add its quantity 0.3% inovulant, the granularity of inovulant is 2mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When bonded hard ferrite magnet is down to 1510 DEG C, poured into a mould, obtained cast iron transh pump casting；
8th step：Austenitizing treatment：Below 200 DEG C of casting ﹤ is fitted into heat-treatment furnace, and 870 are warming up to the speed of 115 DEG C/h DEG C, insulation 2h is quickly cooled to less than 300 DEG C air coolings of coming out of the stove, and obtains cast iron impurity pump component.
Embodiment 2：
A kind of heat treatment method of cast iron transh pump of this example, including following several steps：
The first step：Dispensing：By steel scrap, foundry returns, the pig iron, ferrochrome, molybdenum-iron by 3.0%, Si0.55%, Mn0.75%, P ＜ 0.1%, S ＜ 0.06%, Cr15%, Mo2.75%, the mode of balance of Fe percentage by weights carries out dispensing；
Second step：Preheating：Will optimize calculate steel scrap, foundry returns, the pig iron, ferrochrome, molybdenum-iron input intermediate frequency furnace in carry out Preheating；
3rd step：Melting：After by the steel scrap in intermediate frequency furnace, foundry returns, the pig iron, ferrochrome fusing, its quantity is put into for furnace charge 20%, composition carries out pre-deoxidation for the deoxidier of lime 60%+ fluorites 40%, then puts into the ferrosilicon of baking treatment and obtain iron liquid；
4th step：Both analysis：Take iron liquid casting sample quickly to be analyzed, chemical composition is adjusted according to analysis result；
5th step：Final deoxidizing：Bonded hard ferrite magnet is warming up to 1570 DEG C, putting into the aluminium that its quantity is iron liquid 0.2% carries out final deoxidizing；
6th step：Inoculation：Iron liquid carries out inoculation when flowing to casting ladle from intermediate frequency furnace, and it is iron liquid amount to add its quantity 0.4% inovulant, the granularity of inovulant is 4mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When bonded hard ferrite magnet is down to 1545 DEG C, poured into a mould, obtained cast iron transh pump casting；
8th step：Austenitizing treatment：Below 200 DEG C of casting ﹤ is fitted into heat-treatment furnace, is warming up to the speed of 167.5 DEG C/h 1015 DEG C, insulation 3h is quickly cooled to less than 300 DEG C air coolings of coming out of the stove, and obtains cast iron impurity pump component.
Embodiment 3：
A kind of heat treatment method of cast iron transh pump of this example, including following several steps：
The first step：Dispensing：Steel scrap, foundry returns, the pig iron, ferrochrome, molybdenum-iron are pressed into C3.2%, Si0.8%, Mn0.9%, P ＜ 0.1%, S ＜ 0.06%th, Cr16%, Mo3.0%, the mode of balance of Fe percentage by weights carry out dispensing；
Second step：Preheating：Will optimize calculate steel scrap, foundry returns, the pig iron, ferrochrome, molybdenum-iron input intermediate frequency furnace in carry out Preheating；
3rd step：Melting：After by the steel scrap in intermediate frequency furnace, foundry returns, the pig iron, ferrochrome fusing, its quantity is put into for furnace charge 25%, composition carries out pre-deoxidation for the deoxidier of lime 60%+ fluorites 40%, then puts into the ferrosilicon of baking treatment and obtain iron liquid；
4th step：Both analysis：Take iron liquid casting sample quickly to be analyzed, chemical composition is adjusted according to analysis result；
5th step：Final deoxidizing：Bonded hard ferrite magnet is warming up to 1650 DEG C, putting into the aluminium that its quantity is iron liquid 0.3% carries out final deoxidizing；
6th step：Inoculation：Iron liquid carries out inoculation when flowing to casting ladle from intermediate frequency furnace, and it is iron liquid amount to add its quantity 0.5% inovulant, the granularity of inovulant is 6mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When bonded hard ferrite magnet is down to 1580 DEG C, poured into a mould, obtained cast iron transh pump casting；
8th step：Austenitizing treatment：Below 200 DEG C of casting ﹤ is fitted into heat-treatment furnace, is warming up to the speed of 220 DEG C/h 1160 DEG C, insulation 4h is quickly cooled to less than 300 DEG C air coolings of coming out of the stove, and obtains cast iron impurity pump component.
Specific embodiment of the invention is described above, but these explanations can not be considered as limiting the present invention Scope, protection scope of the present invention limits by appended claims, Wang where appointing on the basis of the claims in the present invention What modification, equivalent and improvement etc., each falls within the Inner of protection scope of the present invention.

Claims (2)

1. a kind of heat treatment method of cast iron transh pump, it is characterised in that：Including following several steps：
The first step：Dispensing：By steel scrap, foundry returns, the pig iron, ferrochrome, molybdenum-iron press C2.8~3.2%, Si0.3~0.8%, Mn0.6~ 0.9%th, P ＜ 0.1%, S ＜ 0.06%, Cr14~16%, Mo2.5~3.0%, the mode of balance of Fe percentage by weights carry out dispensing；
Second step：Preheating：Will optimize calculate steel scrap, foundry returns, the pig iron, ferrochrome, molybdenum-iron input intermediate frequency furnace in carry out Preheating；
3rd step：Melting：After by the steel scrap in intermediate frequency furnace, foundry returns, the pig iron, ferrochrome fusing, its quantity is put into for furnace charge 15~25%, composition carries out pre-deoxidation for the deoxidier of lime 60%+ fluorites 40%, then puts into the ferrosilicon of baking treatment and obtain iron liquid；
4th step：Both analysis：Take iron liquid casting sample quickly to be analyzed, chemical composition is adjusted according to analysis result；
5th step：Final deoxidizing：Bonded hard ferrite magnet is warming up to 1490~1650 DEG C, the aluminium that its quantity is iron liquid 0.1~0.3% is put into Carry out final deoxidizing；
6th step：Inoculation：Iron liquid carries out inoculation when flowing to casting ladle from intermediate frequency furnace, and it is iron liquid amount to add its quantity 0.3~0.5% inovulant, the granularity of inovulant is 2~6mm, and inovulant is 75 ferrosilicon；
7th step：Cast：When bonded hard ferrite magnet is down to 1510~1580 DEG C, poured into a mould, obtained cast iron transh pump casting；
8th step：Austenitizing treatment.
2. the heat treatment method of a kind of cast iron transh pump according to claim 1, it is characterised in that：In the 8th described step In austenitizing treatment, below 200 DEG C of casting ﹤ is fitted into heat-treatment furnace, 870 are warming up to the speed of 115~220 DEG C/h~ 1160 DEG C, 2~4h of insulation is quickly cooled to less than 300 DEG C air coolings of coming out of the stove, and obtains cast iron impurity pump component.
CN201611138532.7A 2016-12-12 2016-12-12 A kind of heat treatment method of cast iron transh pump Pending CN106756459A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109402497A (en) * 2018-12-11 2019-03-01 河北利镔通用设备有限公司 A kind of multicomponent micro-alloying high-chromium cast iron and multicomponent microalloying technique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101082097A (en) * 2005-05-31 2007-12-05 株式会社神户制钢所 High chromium cast iron having excellent fatigue crack resistance and process for producing the same
CN101445889A (en) * 2008-12-26 2009-06-03 马鞍山市益丰实业集团有限公司 High abrasion proof re-synthesizing cast iron grinding ball and production method thereof
RU2419670C1 (en) * 2010-02-24 2011-05-27 Юлия Алексеевна Щепочкина Iron
CN102242305A (en) * 2011-06-29 2011-11-16 江苏明雨耐磨材料有限公司 Production method of composite funnel impact guard plate
CN105274425A (en) * 2015-10-28 2016-01-27 中钢集团邢台机械轧辊有限公司 High-alloy roller for front stage of hot continuous finish rolling and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101082097A (en) * 2005-05-31 2007-12-05 株式会社神户制钢所 High chromium cast iron having excellent fatigue crack resistance and process for producing the same
CN101445889A (en) * 2008-12-26 2009-06-03 马鞍山市益丰实业集团有限公司 High abrasion proof re-synthesizing cast iron grinding ball and production method thereof
RU2419670C1 (en) * 2010-02-24 2011-05-27 Юлия Алексеевна Щепочкина Iron
CN102242305A (en) * 2011-06-29 2011-11-16 江苏明雨耐磨材料有限公司 Production method of composite funnel impact guard plate
CN105274425A (en) * 2015-10-28 2016-01-27 中钢集团邢台机械轧辊有限公司 High-alloy roller for front stage of hot continuous finish rolling and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109402497A (en) * 2018-12-11 2019-03-01 河北利镔通用设备有限公司 A kind of multicomponent micro-alloying high-chromium cast iron and multicomponent microalloying technique

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Application publication date: 20170531