CN105568123A - Manufacturing method of vermicular graphite cast-iron brake drum - Google Patents
Manufacturing method of vermicular graphite cast-iron brake drum Download PDFInfo
- Publication number
- CN105568123A CN105568123A CN201510959877.8A CN201510959877A CN105568123A CN 105568123 A CN105568123 A CN 105568123A CN 201510959877 A CN201510959877 A CN 201510959877A CN 105568123 A CN105568123 A CN 105568123A
- Authority
- CN
- China
- Prior art keywords
- brake drum
- cast iron
- vermicular cast
- iron brake
- manufacture method
- 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
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- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 15
- 239000010439 graphite Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- 230000003595 spectral effect Effects 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 5
- 229910001562 pearlite Inorganic materials 0.000 abstract description 6
- 238000003754 machining Methods 0.000 abstract 1
- 229910001060 Gray iron Inorganic materials 0.000 description 6
- MHKWSJBPFXBFMX-UHFFFAOYSA-N iron magnesium Chemical compound [Mg].[Fe] MHKWSJBPFXBFMX-UHFFFAOYSA-N 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000003115 biocidal effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 208000021017 Weight Gain Diseases 0.000 description 1
- MRHSJWPXCLEHNI-UHFFFAOYSA-N [Ti].[V].[Fe] Chemical compound [Ti].[V].[Fe] MRHSJWPXCLEHNI-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000004584 weight gain Effects 0.000 description 1
- 235000019786 weight gain Nutrition 0.000 description 1
Classifications
-
- 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
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Braking Arrangements (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention belongs to the field of mechanical part machining and manufacturing and particularly relates to a manufacturing method of a vermicular graphite cast-iron brake drum. The manufacturing method is characterized in that vermiculizer containing 12-13% of Ce is used, molten iron processing temperature is 1480-1500 DEG C, and spheroidizing is performed by a pouring process. The vermicular graphite cast-iron brake drum manufactured by the method is excellent in mechanical performance, high in flexural fatigue performance and thermal fatigue performance, high in pearlite content, excellent in wear resistance, low in cost, and the like.
Description
Technical field
The invention belongs to mechanical component processing and manufacturing field, be specifically related to a kind of manufacture method of vermicular cast iron brake drum.
Background technology
Brake drum is a strength member in automobile brake system, is the important guarantee of automobile brake perfrmance and security.For heavy-duty car, brake drum requires to run under heavy loads not break, and has longer work-ing life, can be enough to the stopping distance meeting automobile.
According to the application conditions of brake drum, its material must have enough intensity, hardness, wear resistance and thermal fatigue resistance.Wherein thermal fatigue resistance is the main performance index in influence life-span.For a long time, brake drum material is mainly high-strength gray cast iron, develops vermicular cast iron and metal-base composites in recent years.Vermicular cast iron has the intensity higher than gray iron because of it, the thermal conductivity higher than magnesium iron, and making its thermal fatigue resistance better, is a kind of comparatively ideal brake drum material.Be below the advantage of vermicular cast iron brake drum:
1) high-temperature mechanical property is excellent: nodulizing rate slightly affects hot strength, and larger on plasticity impact, when globular graphite is more than 50%, when brake drum temperature reaches 700 DEG C, vermicular cast iron unit elongation reaches about 22%.Improve matrix, therefore brake drum brake by its be descending produce high temperature time, preferably select vermicular cast iron that globular graphite amount is few as well.
2) fatigue property: the fatigue strength of vermicular cast iron is relevant with its tensile strength, its endurance ratio ratio of tensile strength (the non-notch fatigue strength with) is about 0.45, and this numerical value is similar to the endurance ratio of magnesium iron.
3) thermal fatigue property: because thermal expansion and contraction are restricted the pulsating stress of generation, more than 500 DEG C, due to oxidation and pearlite decomposition, reduce thermal fatigue ability.Same occur more than 700 DEG C austenitic transformation also can reduce thermal fatigue ability (as brake drum descending brake time, temperatures as high 700 DEG C-900 DEG C), then water water cooling, make cast(ing) surface produce martensite crackle, cast properties cannot ensure safety and reliability when braking.
4) resistance toheat of vermicular cast iron: under high temperature, Sauerstoffatom gos deep into metal inside and iron, silicon, the effect of manganese various element along graphite and crackle.Generation volume is large, and the oxide compound that proportion is little, makes foundry goods volume growth.When temperature increases by 8 times from 550 DEG C of-650 DEG C of oxidation rates.Thick vaporous graphite can make growth increase.And globular graphite is mutually isolated, its surface area ratio flake graphite is little many, and vermicular cast iron antibiosis is long and anti-oxidant better than gray iron.Poorer than magnesium iron, in centre.Test at 600 DEG C of oxidation weight gains and show: magnesium iron weightening finish 0.4-0.8%, vermicular cast iron is 07-1.0%, graphitic cast iron 1.2%-1.6%.In 1000 hours oxidation tests, the oxidated layer thickness recorded: magnesium iron is 0.085-0.18mm, vermicular cast iron is 0.13-0.20 gray iron is 0.19-0.27.Illustrate that vermicular cast iron antibiosis is long, antioxidant property is better than graphitic cast iron.
5) wear resistance: the wear resistance of vermicular cast iron is 2-2.8 times of graphitic cast iron, and such as vermicular cast iron steam jacket wear resistance carries 50%-70% than gray iron steam jacket.
But because the ferritic amount of traditional vermicular cast iron is comparatively large, hardness is lower, and wear resistance is still not enough; In addition, its pearlitic less stable, in the heating-process of cooling of long-term immobilization drum, content of pearlite in alloy reduces, and intensity reduces, and affects its work-ing life.Although most of foundry enterprise, by improving the brake drum trade mark, changes HT250 into by HT200, improves the mechanical property of its material tensile strength, but still the present situation that automobile horsepower increases and stowage capacity increases severely cannot be met.At present, the over-all properties that alloying element can improve vermicular cast iron brake drum is further added.As the preparation method that patent " vanadium titanium vermicular cast iron brake drum and preparation method thereof " (CN102071352) is a kind of typical compacted black iron brake drum, but the vanadium titanium iron that this technology needs is main starting material, and vanadium titanium makes machinability obviously reduce, tooling cost increases.Thus, a kind of good mechanical performance, content of pearlite in alloy are high, and the manufacture method of fatigue property and thermal fatigue property is high, wear resisting property is excellent and with low cost vermicular cast iron brake drum is urgently developed.
Summary of the invention
For the deficiencies in the prior art, the manufacture method of a kind of vermicular cast iron brake drum of the present invention, the vermicular cast iron brake drum of production has that good mechanical performance, fatigue property and thermal fatigue property are high, content of pearlite in alloy is high, wear resisting property is excellent and the advantage such as with low cost.
A manufacture method for vermicular cast iron brake drum, uses the vermiculizer containing Ce12-13%, molten iron treatment temp 1480 ~ 1500 DEG C, and employing is poured method and carried out spheroidizing.
Carry out making compactedization grade by quick metallographic method, chill block and spectral component control to control, make brake drum body nodulizing rate stablely to reach >=50%.
Containing tin, not cupric and chromium in this vermicular cast iron brake drum.
The content of described tin is 0.04%-0.1%
Preferably, the content of described tin is 0.06%.
The tensile strength of this vermicular cast iron brake drum is 350-450MPa, unit elongation 2-5%.
This vermicular cast iron brake drum contains the globular graphite of 30%.
The bending fatigue strength of this vermicular cast iron brake drum is 210N/mm
2.
Advantageous Effects of the present invention: do not add the precious metal such as copper, Chrome metal powder in vermicular cast iron brake drum of the present invention, by low tin content and vermicularizing treating process, not only casting cost is reduced, reduce the labour intensity of operator, also improve the pearlitic content in the middle of vermicular cast iron metallographic structure, which thereby enhance tensile strength and the unit elongation of vermicular cast iron brake drum, its mechanical property and safety coefficient are also greatly enhanced, extend the work-ing life of vermicular cast iron brake drum, reduce sum of insurance; Containing 30% globular graphite bending fatigue strength in vermicular cast iron brake drum of the present invention is 210N/mm
2, than gray iron bending fatigue strength 80-120N/mm
2much higher; The present invention is by the fixed compactedization grade view of quick metallographic legal system, carry out stokehold to judge fast, formulate nodulizing rate fracture by chill block and judge view, the composition range of regulation S, Mg, rare earth is controlled by spectral component, thus control nodulizing rate scope and grade, thus make brake drum body nodulizing rate stablely to reach>=50%; The present invention also significantly improves the mechanical property of brake drum, for automotive light weight technology design provides possibility.Comprehensively above-mentioned, the vermicular cast iron brake drum utilizing the inventive method to produce has that good mechanical performance, fatigue property and thermal fatigue property are high, content of pearlite in alloy is high, wear resisting property is excellent and the advantage such as with low cost.
Specific embodiment
embodiment 1
A manufacture method for vermicular cast iron brake drum, uses the vermiculizer containing Ce12-13%, molten iron treatment temp 1480 ~ 1500 DEG C, and employing is poured method and carried out spheroidizing; Carry out making compactedization grade by quick metallographic method, chill block and spectral component control to control, make brake drum body nodulizing rate stablely to reach>=50%; Containing tin, not cupric and chromium in this vermicular cast iron brake drum, wherein, the content of described tin is 0.04%, and tensile strength is 350-450MPa, unit elongation 2-5%; This vermicular cast iron brake drum contains the globular graphite of 30%, and bending fatigue strength is 210N/mm
2.
embodiment 2
A manufacture method for vermicular cast iron brake drum, uses the vermiculizer containing Ce12-13%, molten iron treatment temp 1480 ~ 1500 DEG C, and employing is poured method and carried out spheroidizing; Carry out making compactedization grade by quick metallographic method, chill block and spectral component control to control, make brake drum body nodulizing rate stablely to reach>=50%; Containing tin, not cupric and chromium in this vermicular cast iron brake drum, wherein, the content of described tin is 0.06%, and tensile strength is 350-450MPa, unit elongation 2-5%; This vermicular cast iron brake drum contains the globular graphite of 30%, and bending fatigue strength is 210N/mm
2.
embodiment 3
A manufacture method for vermicular cast iron brake drum, uses the vermiculizer containing Ce12-13%, molten iron treatment temp 1480 ~ 1500 DEG C, and employing is poured method and carried out spheroidizing; Carry out making compactedization grade by quick metallographic method, chill block and spectral component control to control, make brake drum body nodulizing rate stablely to reach>=50%; Containing tin, not cupric and chromium in this vermicular cast iron brake drum, wherein, the content of described tin is 0.1%, and tensile strength is 350-450MPa, unit elongation 2-5%; This vermicular cast iron brake drum contains the globular graphite of 30%, and bending fatigue strength is 210N/mm
2.
Above to embodiments of the invention for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. a manufacture method for vermicular cast iron brake drum, is characterized in that: use the vermiculizer containing Ce12-13%, molten iron treatment temp 1480 ~ 1500 DEG C, and employing is poured method and carried out spheroidizing.
2. the manufacture method of vermicular cast iron brake drum according to claim 1, is characterized in that: undertaken making compactedization grade by quick metallographic method, chill block and spectral component control and control, brake drum body nodulizing rate is stablized reach >=50%.
3. the manufacture method of vermicular cast iron brake drum according to claim 2, is characterized in that: containing tin, not cupric and chromium in this vermicular cast iron brake drum.
4. the manufacture method of vermicular cast iron brake drum according to claim 3, is characterized in that: the content of described tin is 0.04%-0.1%.
5. the manufacture method of vermicular cast iron brake drum according to claim 3, is characterized in that: the content of described tin is 0.06%.
6. the manufacture method of the vermicular cast iron brake drum according to claim 4 or 5, is characterized in that: the tensile strength of this vermicular cast iron brake drum is 350-450MPa, unit elongation 2-5%.
7. the manufacture method of the vermicular cast iron brake drum according to claim 2 or 4 or 5, is characterized in that: this vermicular cast iron brake drum contains the globular graphite of 30%.
8. the manufacture method of vermicular cast iron brake drum according to claim 7, is characterized in that: the bending fatigue strength of this vermicular cast iron brake drum is 210N/mm
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510959877.8A CN105568123A (en) | 2015-12-21 | 2015-12-21 | Manufacturing method of vermicular graphite cast-iron brake drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510959877.8A CN105568123A (en) | 2015-12-21 | 2015-12-21 | Manufacturing method of vermicular graphite cast-iron brake drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105568123A true CN105568123A (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510959877.8A Pending CN105568123A (en) | 2015-12-21 | 2015-12-21 | Manufacturing method of vermicular graphite cast-iron brake drum |
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| CN (1) | CN105568123A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794437A (en) * | 2017-10-20 | 2018-03-13 | 莒州集团有限公司 | With two kinds of same stove molten iron casting and the method for above unlike material cast iron products |
| CN111676416A (en) * | 2020-06-23 | 2020-09-18 | 飞龙汽车部件股份有限公司 | Austenitic vermicular cast iron material |
| CN113458363A (en) * | 2021-07-26 | 2021-10-01 | 驻马店恒久机械制造有限公司 | Bimetal iron-iron composite brake drum and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000009668A (en) * | 1998-06-25 | 2000-01-14 | Nippon Saburansu Probe Engineering:Kk | Judgment method for graphite shape of spheroidal graphite cast iron and cv-shaped graphite cast iron |
| CN101956123A (en) * | 2010-09-28 | 2011-01-26 | 丹阳市振兴锅炉配件有限公司 | Production method of high-abrasion-resistance antifatigue vermicular cast iron |
| CN102787198A (en) * | 2012-08-29 | 2012-11-21 | 福建省建阳市杜氏铸造有限公司 | Vermicular cast iron and manufacturing method of vermicular cast iron |
| CN103866177A (en) * | 2012-12-12 | 2014-06-18 | 金建平 | High-strength-and-toughness cast iron heavy-duty automobile brake drum and making technology thereof |
| CN104178683A (en) * | 2014-09-01 | 2014-12-03 | 罗建华 | Efficient REMgVCaSiFe alloy vermiculizer and production process thereof |
| CN104233052A (en) * | 2014-09-24 | 2014-12-24 | 山东宏马工程机械有限公司 | Chromium, molybdenum and copper alloy cast iron braking drum and preparation method thereof |
-
2015
- 2015-12-21 CN CN201510959877.8A patent/CN105568123A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000009668A (en) * | 1998-06-25 | 2000-01-14 | Nippon Saburansu Probe Engineering:Kk | Judgment method for graphite shape of spheroidal graphite cast iron and cv-shaped graphite cast iron |
| CN101956123A (en) * | 2010-09-28 | 2011-01-26 | 丹阳市振兴锅炉配件有限公司 | Production method of high-abrasion-resistance antifatigue vermicular cast iron |
| CN102787198A (en) * | 2012-08-29 | 2012-11-21 | 福建省建阳市杜氏铸造有限公司 | Vermicular cast iron and manufacturing method of vermicular cast iron |
| CN103866177A (en) * | 2012-12-12 | 2014-06-18 | 金建平 | High-strength-and-toughness cast iron heavy-duty automobile brake drum and making technology thereof |
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| CN104233052A (en) * | 2014-09-24 | 2014-12-24 | 山东宏马工程机械有限公司 | Chromium, molybdenum and copper alloy cast iron braking drum and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107794437A (en) * | 2017-10-20 | 2018-03-13 | 莒州集团有限公司 | With two kinds of same stove molten iron casting and the method for above unlike material cast iron products |
| CN111676416A (en) * | 2020-06-23 | 2020-09-18 | 飞龙汽车部件股份有限公司 | Austenitic vermicular cast iron material |
| CN113458363A (en) * | 2021-07-26 | 2021-10-01 | 驻马店恒久机械制造有限公司 | Bimetal iron-iron composite brake drum and manufacturing method thereof |
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Application publication date: 20160511 |