CN100586608C - Method for casting printing machine as-cast nodular iron roller body - Google Patents

Method for casting printing machine as-cast nodular iron roller body Download PDF

Info

Publication number
CN100586608C
CN100586608C CN200610147888A CN200610147888A CN100586608C CN 100586608 C CN100586608 C CN 100586608C CN 200610147888 A CN200610147888 A CN 200610147888A CN 200610147888 A CN200610147888 A CN 200610147888A CN 100586608 C CN100586608 C CN 100586608C
Authority
CN
China
Prior art keywords
melting
casting
cast
printing machine
furnace
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.)
Active
Application number
CN200610147888A
Other languages
Chinese (zh)
Other versions
CN101209491A (en
Inventor
徐清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUAXIN ALLOY CO Ltd SHANGHAI
Original Assignee
HUAXIN ALLOY CO Ltd SHANGHAI
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 HUAXIN ALLOY CO Ltd SHANGHAI filed Critical HUAXIN ALLOY CO Ltd SHANGHAI
Priority to CN200610147888A priority Critical patent/CN100586608C/en
Publication of CN101209491A publication Critical patent/CN101209491A/en
Application granted granted Critical
Publication of CN100586608C publication Critical patent/CN100586608C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention discloses a casting method of a cast nodular iron roller cylinder of a printing machine. The steps of the method comprise sand mixture modeling, mould assembling, burden melting, inoculation tapping, casting, cooling, unpacking, casting cleaning, quality inspecting, casting rough machining and artificial aging. The method is characterized in that: the burden melting step comprises burden arranging and melting, and the burden comprises 40 to 60wt percent of pig iron, 30 to 40wt percent of foundry return, and 10 to 30wt percent of scrap steel; iron liquor melting is done to the arranged burden by adopting an intermediate frequency induction electric furnace, and the highest melting temperature is 1530 to 1540 DEG C; the inoculation tapping step comprises two steps of spheroidisation and barium ferrosilicon first inoculation; a secondary inoculation processing is done at the same time with the casting step.

Description

Method for casting printing machine as-cast nodular iron roller body
Technical field
The present invention relates to a kind of casting method, particularly a kind of method for casting printing machine as-cast nodular iron roller body.
Background technology
The printer roller cylindrical shell is the key components and parts of decision and restriction press speed and effect.Along with the raising of printing technology, print speed printing speed by original per hour 8000 bring up to 13000.After the printing machine speed-raising, the mechanical performance of roller body is had higher requirement, mouthful foundry goods HT250 trade mark of ash does not originally satisfy requirement.New printer roller cylinder material will satisfy tensile strength 〉=500Mp, percentage elongation 〉=7%, hardness HBS=170~230; Metallographic structure requires nodularization rate 〉=80% at roller body working face 31mm thickness place, and content of pearlite in alloy is 5~30%; Roller body working face wall thickness is wanted evenly, and wall thickness deviation≤1mm is steadily moving to guarantee product; Not allowing casting iron defect on the roller body working face exists.Therefore how to satisfy the key that above-mentioned specification requirement has become casting printer roller cylindrical shell.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method for casting printing machine as-cast nodular iron roller body, so that the printing machine as-cast nodular iron roller body of producing can satisfy the requirement of printing speed-raising back to printing machine as-cast nodular iron roller body, the technical scheme that it adopts is:
A kind of method for casting printing machine as-cast nodular iron roller body, its step comprise mixed husky moulding, mould assembly, and the furnace charge melting is bred and tapped a blast furnace, cast, and cooling, unpacking, casting cleaning, quality inspection, foundry goods roughing, artificial aging is characterized in that:
Described furnace charge melting step comprises configuration furnace charge and melting, and the weight proportion of furnace charge is: contain the pig iron of 40-50%, the foundry return of 30-40%, the steel scrap of 10-30%; Institute's furnace burdening adopts medium-frequency induction furnace to carry out the melting of iron liquid, and maximum temperature is 1530-1540 ℃ during fusing; The described ironworker's of being pregnant with preface comprises that spheroidising and silicon barium once breed two steps, and will carry out simultaneously handling with stream sulphur oxygen late inoculation in the cast operation.
Wherein, the total amount of the nodulizer that described spheroidising step adds is the 1.5%-1.6% of the melting amount of tapping a blast furnace, and the nodulizer granularity is 4~20mm, and the chemical composition mass percent of nodulizer is: the Mg of 5.9-6.3%, the RE of 2.0-2.4%, the Si of 44-48%, the Ca of 2.1-2.5% is less than or equal to 1.0% Al, and the Fe of surplus, add this nodulizer, if breed proper, spheroidizing that can fine performance magnesium and rare earth to desulfurization, degas and in and the harmful element good effectiveness.
The granularity of the silicon titanate innoculant that inoculation step of described silicon barium is selected is 5-10mm, the total amount of the silicon titanate innoculant that adds is the 0.5%-0.6% of the melting amount of tapping a blast furnace, the chemical composition mass percent of silicon titanate innoculant is: the Si of 60-70%, the Ca of 0.8-2.2%, be less than or equal to 1.0% Al, the Ba of 4.0-6.0%, and the Fe of surplus, inoculation is the key of ductile iron production, large-section magnesium iron is even more important, pregnant effect has determined the quantity of graphite nodule, the size of graphite nodule and the roundness of graphite nodule, this of adding kind of silicon titanate innoculant can effectively increase the quantity of graphite nodule and have the anti-ageing ability of moving back.
The granularity with the sulphur oxygen inovulant in the processing of stream sulphur oxygen late inoculation of carrying out simultaneously in cast is 0.2-0.7mm, the total amount of the sulphur oxygen inovulant that adds is the 0.1%-0.15% of the melting amount of tapping a blast furnace, the chemical composition mass percent of sulphur oxygen inovulant is: the Si of 70-76%, the Ca of 1.5-2.0%, the Al of 0.75-1.25%, the Ce of 1.5-2.0%, the S of 0.5-0.8%, the O of 0.3-0.5%, and the Fe of surplus, handle through late inoculation so again, guaranteed nodularization rate and nodularization quality more.
Before the mould assembly, be provided with floamed ceramics filtrating piece in described mixed husky moulding, the mould assembly operation in the sprue bottom; Described cast program adopts upright cast rising pouring pouring technology, and wherein pouring temperature is controlled at 1380-1400 ℃.
The invention has the beneficial effects as follows:
After adopting casting method of the present invention, the printer roller cylindrical shell tensile strength 〉=500Mp that produces, percentage elongation 〉=7%, hardness HBS=170~230; The nodularization rate at metallographic structure roller body working face 31mm thickness place is greater than 80%, content of pearlite in alloy is 5~30%, and roller body working face wall thickness is wanted evenly, wall thickness deviation≤1mm, do not have casting iron defect to exist on the roller body working face, satisfy of the requirement of printing speed-raising back fully the printer roller cylindrical shell.
The specific embodiment
Embodiment 1, and method for casting printing machine as-cast nodular iron roller body comprises:
(1) mixes husky moulding, mould assembly
Adopt the horizontal moulding of furane self-hardening sand molding then, repair type, coat, core down, in the sprue bottom floamed ceramics filtrating piece is set, mould assembly then, to be cast with behind the tight case of bolt casting mold being holded up etc.
(2) furnace charge melting
Dispose furnace charge earlier, the weight proportion of furnace charge is: contain 40% the pig iron, 40% foundry return, 20% steel scrap; Then the furnace charge that configures is dropped into medium-frequency induction furnace and carry out the melting of iron liquid, maximum temperature is 1540 ℃ during fusing, leaves standstill insulation 5~10 minutes, allows impurity in the iron liquid is fully floating to come up, claw with the rapid collection of rapid slag agent, do not allow these impurity bands in the iron liquid of handling.
(3) breed and tap a blast furnace
Specifically comprise two steps of inoculation of spheroidising and silicon barium, wherein spheroidising is adopted and is poured the method spheriodization process thereof, the nodulizer granularity is 4mm, the nodulizer addition is 1.5% of the melting amount of tapping a blast furnace, iron liquid tapping temperature is 1460~1490 ℃, the amount of tapping a blast furnace is 2/3 of a total amount for the first time, the spheroidizing reacion time is 60~90 seconds behind the adding nodulizer, after finishing, takes off question response the scum silica frost on the quiet iron liquid, add again into remaining 1/3 iron liquid, at this moment carry out inoculation one time along with iron liquid stream adds silicon titanate innoculant; The chemical composition mass percent of nodulizer is: 5.9% Mg, 2.0% RE, 48% Si, 2.1% Ca, 1.0% Al, and the Fe of surplus; The granularity of the silicon titanate innoculant that adds is 5mm, and the total amount of the silicon titanate innoculant of adding is 0.5% of the melting amount of tapping a blast furnace, and the chemical composition mass percent of silicon titanate innoculant is: 70% Si, 2.2% Ca, 1.0% Al, 4.0% Ba, and the Fe of surplus.
(4) cast
Adopt vertical upright casting rising pouring pouring technology, in the sprue bottom floamed ceramics filtrating piece is set and carries out pushing off the slag; Wherein pouring temperature is controlled at 1400 ℃; Cast adds sulphur oxygen inovulant with stream simultaneously and carries out late inoculation, wherein the granularity of sulphur oxygen inovulant is 0.2mm, the total amount of the sulphur oxygen inovulant that adds is 0.1% of the melting amount of tapping a blast furnace, the chemical composition mass percent of sulphur oxygen inovulant is: 76% Si, 2.0% Ca, 0.75% Al, 2.0% Ce, 0.8% S, 0.5% O, and the Fe of surplus.
(5) cooling, unpacking
(6) casting cleaning
(7) quality inspection
Quality inspection, underproof eliminate, the qualified subsequent processing that enters.
(8) foundry goods roughing
(9) artificial aging
Take artificial aging to handle by technological requirement, eliminate stress.
Following table 1 is the main technologic parameters of several embodiments of the present invention.
Table 1
The technical process of embodiment 2,3,4 repeats no more with embodiment 1.

Claims (5)

1. method for casting printing machine as-cast nodular iron roller body, its step comprise and mix husky moulding, mould assembly, and the furnace charge melting is bred and tapped a blast furnace, and cast, is unpacked casting cleaning, quality inspection, foundry goods roughing, artificial aging at cooling; It is characterized in that:
Described furnace charge melting step comprises configuration furnace charge and melting, and the weight proportion of furnace charge is: contain the pig iron of 40-50%, the foundry return of 30-40%, the steel scrap of 10-30%; Institute's furnace burdening adopts medium-frequency induction furnace to carry out the melting of iron liquid, and maximum temperature is 1530-1540 ℃ during fusing;
The described ironworker's of being pregnant with preface comprises that spheroidising and silicon barium once breed two steps, the total amount of the nodulizer that the spheroidising step adds is the 1.5%-1.6% of the melting amount of tapping a blast furnace, the chemical composition mass percent of nodulizer is: Mg 5.9-6.3%, RE 2.0-2.4%, Si 44-48%, Ca 2.1-2.5%, Al≤1.0%, surplus is Fe; The total amount of the silicon titanate innoculant that adds in inoculation step of described silicon barium is the 0.5%-0.6% of the melting amount of tapping a blast furnace, the chemical composition mass percent of silicon titanate innoculant is: the Si of 60-70%, the Ca of 0.8-2.2%, be less than or equal to 1.0% Al, the Ba of 4.0-6.0%, and surplus is Fe;
Described cast program adopts upright cast rising pouring pouring technology, and wherein pouring temperature is controlled at 1380-1400 ℃;
To carry out simultaneously handling in the cast operation with stream sulphur oxygen late inoculation, the total amount of the sulphur oxygen inovulant that adds is the 0.1%-0.15% of the melting amount of tapping a blast furnace, the chemical composition mass percent of sulphur oxygen inovulant is: Si 70-76%, Ca 1.5-2.0%, Al 0.75-1.25%, Ce 1.5-2.0%, S 0.5-0.8%, O 0.3-0.5%, surplus is Fe.
2. method for casting printing machine as-cast nodular iron roller body as claimed in claim 1 is characterized in that: described nodulizer granularity is 4~20mm.
3. method for casting printing machine as-cast nodular iron roller body as claimed in claim 1 is characterized in that: the granularity of described silicon titanate innoculant is 5-10mm.
4. method for casting printing machine as-cast nodular iron roller body as claimed in claim 1 is characterized in that: the granularity of described sulphur oxygen inovulant is 0.2-0.7mm.
5. method for casting printing machine as-cast nodular iron roller body as claimed in claim 1 is characterized in that: before the mould assembly, be provided with floamed ceramics filtrating piece in the sprue bottom in described mixed husky moulding, the mould assembly operation.
CN200610147888A 2006-12-25 2006-12-25 Method for casting printing machine as-cast nodular iron roller body Active CN100586608C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200610147888A CN100586608C (en) 2006-12-25 2006-12-25 Method for casting printing machine as-cast nodular iron roller body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200610147888A CN100586608C (en) 2006-12-25 2006-12-25 Method for casting printing machine as-cast nodular iron roller body

Publications (2)

Publication Number Publication Date
CN101209491A CN101209491A (en) 2008-07-02
CN100586608C true CN100586608C (en) 2010-02-03

Family

ID=39609844

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200610147888A Active CN100586608C (en) 2006-12-25 2006-12-25 Method for casting printing machine as-cast nodular iron roller body

Country Status (1)

Country Link
CN (1) CN100586608C (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101745608B (en) * 2008-11-28 2012-01-04 上海华新合金有限公司 Method for casting air cylinder of air-conditioner compressor
CN101823140B (en) * 2009-03-03 2012-02-22 上海华新合金有限公司 Process for manufacturing saloon car clutch pressure plate casting
CN101927499B (en) * 2009-06-23 2012-08-01 上海华新合金有限公司 Method for making robot base casting
CN101987348B (en) * 2009-08-06 2012-12-19 上海华新合金有限公司 Method for casting road roller bracket casting
CN102078956B (en) * 2009-12-01 2013-02-27 上海华新合金有限公司 Method for casting mechanical arm casting of robot
CN101921945B (en) * 2010-08-31 2012-12-05 河北新兴铸管有限公司 Liquid iron inoculation process for ductile iron pipes
CN102260816A (en) * 2011-06-08 2011-11-30 苏州市海威特铸造厂 Smelting and pouring process of diesel engine body
CN102728794B (en) * 2012-06-20 2014-06-18 内蒙古包钢钢联股份有限公司 Composition of nodulizer and inoculant special for large-section bulb iron roll
CN104419853A (en) * 2013-08-20 2015-03-18 烟台双诚机械有限公司 Method for casting multiple unit motor end cover through special aluminum-magnesium alloy
CN104004959A (en) * 2014-05-23 2014-08-27 东营恒诚机械有限公司 Method for treating ductile cast iron foundry returns by applying non-silicone nodulizing agent in ductile cast iron smelting
CN110125341A (en) * 2019-06-10 2019-08-16 安徽裕隆模具铸业有限公司 A kind of random inoculant and its application method
CN110629106B (en) * 2019-11-08 2020-07-24 沈阳工业大学 Method for reinforcing nodular cast iron material by using nano SiO2 particles
CN110983165A (en) * 2019-12-31 2020-04-10 三祥新材股份有限公司 Inoculant for nodular cast iron and preparation method thereof

Also Published As

Publication number Publication date
CN101209491A (en) 2008-07-02

Similar Documents

Publication Publication Date Title
CN100586608C (en) Method for casting printing machine as-cast nodular iron roller body
CN101716651B (en) Method for casting turbo supercharger volute shell casting for large ship
CN101698895B (en) Low-cost preparation method for high-elongation ductile iron castings
CN101585078A (en) Method for casting as-cast high-tenacity cast iron bearing cover of locomotive
CN101407884A (en) Smelting technique for cast of wind energy apparatus
CN103215488A (en) Method for integrally casting large-sized V-shaped diesel engine body by utilizing nodular cast iron
CN108624806A (en) A kind of preparation method of the spheroidal graphite cast-iron of high-intensity and high-tenacity
WO2011015005A1 (en) Method for casting planet carrier made of ductile cast-iron
CN103320677A (en) Spheroidal graphite cast iron and manufacturing method thereof
CN101886210A (en) Formula of vermicular cast iron dual mass flywheel and preparation method thereof
CN108707813B (en) As-cast high-strength ductile iron and its manufacturing process
CN104060155B (en) A kind of HT250 foundry goods and production method thereof
CN107119168B (en) A kind of method of blast-melted short route casting high-quality casting
CN108746508B (en) Production process of multi-alloy cylinder cover
CN109023034A (en) A kind of preparation method of high-strength thin-walled gray iron casting
CN111074145B (en) Low-temperature-toughness ultra-thick large-end-face ferritic nodular iron casting and preparation method thereof
CN104060183B (en) A kind of oscillating arm bracket and production method thereof
CN110280711B (en) Method for producing precision casting high-performance ductile iron by using low-carbon steel scrap
CN104060153B (en) A kind of HT200 foundry goods and production method thereof
CN102373365B (en) Large-section nodular cast iron
CN104060154A (en) QT500 casting and production method thereof
CN108950368B (en) A kind of case of transmission spheroidal graphite cast-iron
CN107245642B (en) A kind of equalizing suspension system casting with spheroidal graphite cast-iron plastics on new materials with and preparation method thereof
CN102212738B (en) Production process for solving slag shrinkage holes of centrifugal cast cylinder sleeve
CN104060151A (en) QT600 casting and a production method thereof

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model