CN113584374A - High-strength and high-wear-resistance vanadium-titanium cast iron brake drum - Google Patents
High-strength and high-wear-resistance vanadium-titanium cast iron brake drum Download PDFInfo
- Publication number
- CN113584374A CN113584374A CN202110808413.2A CN202110808413A CN113584374A CN 113584374 A CN113584374 A CN 113584374A CN 202110808413 A CN202110808413 A CN 202110808413A CN 113584374 A CN113584374 A CN 113584374A
- Authority
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- China
- Prior art keywords
- brake drum
- vanadium
- titanium
- cast iron
- iron
- 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.)
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- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000005266 casting Methods 0.000 claims abstract description 12
- 239000010936 titanium Substances 0.000 claims abstract description 10
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 10
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 10
- 229910000805 Pig iron Inorganic materials 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000011081 inoculation Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract 3
- 238000010791 quenching Methods 0.000 claims abstract 2
- 230000000171 quenching effect Effects 0.000 claims abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 229910002804 graphite Inorganic materials 0.000 claims description 16
- 239000010439 graphite Substances 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 claims description 8
- 229910001562 pearlite Inorganic materials 0.000 claims description 7
- 229910001060 Gray iron Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 9
- 238000003723 Smelting Methods 0.000 abstract description 5
- 238000005496 tempering Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- -1 performing smelting Substances 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 241001584785 Anavitrinella pampinaria Species 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/10—Drums for externally- or internally-engaging brakes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Braking Arrangements (AREA)
Abstract
本发明公开了一种高强和高耐磨性的钒钛铸铁制动鼓，涉及汽车零部件制造领域。所述制动鼓是由含有钒、钛元素的天然钒钛生铁与废钢、回炉料为主要原料，覆膜砂为铸型材料，经过熔炼、成分调质、两次孕育后浇铸而成，制动鼓具有低碳和高硅碳比的特点，保证制动鼓具有高的强度和耐磨性，以适应汽车频繁制动和紧急刹车对制动鼓的苛刻要求。The invention discloses a vanadium-titanium cast iron brake drum with high strength and high wear resistance, and relates to the field of automobile parts manufacturing. The brake drum is made of natural vanadium-titanium pig iron containing vanadium and titanium elements, scrap steel, and return material as the main raw materials, and the coated sand is the casting material, which is cast after smelting, composition quenching and tempering, and two inoculations. The moving drum has the characteristics of low carbon and high silicon-carbon ratio, which ensures that the brake drum has high strength and wear resistance to meet the harsh requirements of the brake drum for frequent braking and emergency braking of automobiles.
Description
Technical Field
The invention relates to the field of automobile part manufacturing, in particular to a high-strength and high-wear-resistance vanadium-titanium cast iron brake drum.
Background
The automobile brake drum is one of important safety protection parts of an automobile, and the performance and the quality of the automobile brake drum are concerned with the life safety of people in the driving process of the automobile. The service environment of the automobile brake drum is very harsh and is under the complex working conditions of strong friction, mechanical impact and temperature impact. Therefore, the brake drum must have good wear resistance, high mechanical strength and a certain toughness. Good thermal conductivity and fatigue resistance are also properties that the brake drum should possess in order to ensure heat dissipation and reduce cracking. Cast iron is the most important material for manufacturing automobile brake drums. However, the common gray cast iron brake drum has low hardness and strength, poor wear resistance and short service life, and can not meet the performance requirements of the modern automobile brake drum. The alloy gray cast iron has greatly improved strength, hardness and wear resistance due to the strengthening effect of alloy elements. Vanadium and titanium are used as strong carbide forming elements, a carbide strengthening phase can be formed in the cast iron, and simultaneously the vanadium and titanium also have the function of refining a matrix structure, so that the vanadium-titanium alloy gray cast iron added with the vanadium and titanium is a potential material for preparing the automobile brake drum. Carbon is an essential element of cast iron and is present in the cast iron in the form of free graphite, carbides, alloy cementites. Carbon is an element that strongly promotes graphitization, and an increase in the amount of carbon increases the amount of graphite, making the graphite coarse. The mass fraction of carbon in the gray cast iron is generally in the range 2.7% to 3.8%, mainly in the form of flake graphite. In the existing report, the carbon content in the vanadium-titanium cast iron brake drum is usually above 3.2%, and although the higher carbon content is beneficial to ensuring the amount of graphite in the vanadium-titanium cast iron brake drum, the higher carbon content is not beneficial to obtaining a high-content pearlite matrix structure, so that the brake drum with high strength and high hardness is difficult to obtain.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a vanadium-titanium cast iron brake drum with high strength and high wear resistance.
In order to achieve the purpose, the invention adopts the technical scheme that: the brake drum is made of gray cast iron containing vanadium and titanium elements, and comprises the following chemical components in percentage by weight: 2.95-3.1%, Si: 1.7-1.85%, Mn: 0.8-0.9%, P: less than or equal to 0.04 percent, S: less than or equal to 0.05 percent, V: 0.15 to 0.25%, Ti: 0.05-0.2%, and the balance of iron and other inevitable impurities; the pearlite content in the matrix structure of the brake drum is not less than 95%, the A-type graphite content in the graphite form is not less than 85%, the graphite length is 4-5 grades, the tensile strength of the brake drum is 290-370 MPa, the hardness is HB 200-265, and the brake drum has high strength and high wear resistance.
Preferably, the brake drum is cast by adopting a precoated sand process, the molten iron used for smelting is prepared from 50-90 parts by weight of natural vanadium-titanium pig iron, 0-20 parts by weight of scrap steel and 10-30 parts by weight of foundry returns, the molten iron is subjected to component tempering and twice inoculation and then poured into a casting mold, and the casting temperature is 1350-1380 ℃.
The invention has the beneficial effects that: the vanadium-titanium cast iron brake drum takes the design idea of taking low carbon content, high silicon-carbon ratio and proper amount of vanadium-titanium alloy as components, fully exerts the performance advantages of high hardness, high strength and high wear resistance of the vanadium-titanium cast iron brake drum, and ensures that the vanadium-titanium cast iron brake drum has stable pearlite matrix structure and high content of A-type graphite through the control of a casting process, thereby ensuring that the vanadium-titanium cast iron brake drum has good toughness and thermal conductivity while having high strength and high wear resistance. Secondly, the vanadium-titanium element is introduced into the cast iron brake drum for alloying by taking natural vanadium-titanium pig iron in Panxi area as one of raw materials, and the vanadium-titanium cast iron brake drum is prepared by a precoated sand casting process, so that the advantages of low cost and high efficiency are achieved while the performance and the quality of the brake drum are ensured.
Detailed Description
The present invention is further illustrated by the following specific examples, but the present invention is not limited to the following examples, and any non-inventive modifications made by those skilled in the art based on the present invention are within the scope of the present invention.
Example 1
The brake drum is prepared by taking 60 parts by weight of natural vanadium-titanium pig iron, 20 parts by weight of scrap steel and 20 parts by weight of foundry returns as raw materials, performing smelting, component tempering and two-time inoculation treatment, and then casting the molten iron into a casting mold made of precoated sand at 1350 ℃, wherein the obtained vanadium-titanium pig iron brake drum comprises the following components: 3.03%, Si: 1.72%, Mn: 0.85%, P: 0.025%, S: 0.042%, V: 0.18%, Ti: 0.056 percent and the balance of iron. Through tissue analysis and performance tests, the pearlite content in the matrix tissue of the brake drum is 98%, the A-type graphite content in the graphite form is 88%, the graphite length is 5-grade, the tensile strength of the brake drum is 368.5MPa, and the hardness is HB 263.
Example 2
Taking 70 parts by weight of natural vanadium-titanium pig iron, 10 parts by weight of scrap steel and 20 parts by weight of foundry returns as raw materials, performing smelting, component tempering and twice inoculation treatment, and casting molten iron into a casting mold made of precoated sand at 1370 ℃, wherein the obtained vanadium-titanium cast iron brake drum comprises the following components: 3.1%, Si: 1.8%, Mn: 0.88%, P: 0.032%, S: 0.045%, V: 0.22%, Ti: 0.098% and the balance iron. Through tissue analysis and performance tests, the pearlite content in the matrix tissue of the brake drum is 96%, the A-type graphite content in the graphite form is 93%, the graphite length is 5-grade, the tensile strength of the brake drum is 291MPa, and the hardness is HB 217.
Example 3
Taking 50 parts by weight of natural vanadium-titanium pig iron, 20 parts by weight of scrap steel and 30 parts by weight of foundry returns as raw materials, performing smelting, component tempering and two times of inoculation treatment, and casting the molten iron into a casting mold made of precoated sand at 1350 ℃, wherein the obtained vanadium-titanium cast iron brake drum comprises the following components: 2.97%, Si: 1.77%, Mn: 0.85%, P: 0.038%, S: 0.036%, V: 0.18%, Ti: 0.12% and the balance iron. Through tissue analysis and performance tests, the pearlite content in the matrix tissue of the brake drum is 97%, the A-type graphite content in the graphite form is 90%, the graphite length is 4-grade, the tensile strength of the brake drum is 357.2MPa, and the hardness is HB 256.
Claims (2)
1. The utility model provides a vanadium titanium cast iron brake drum of high strength and high wearability, its characterized in that, brake drum material is the grey cast iron who contains vanadium, titanium element, according to weight percent, the chemical composition of brake drum is, C: 2.95-3.1%, Si: 1.7-1.85%, Mn: 0.8-0.9%, P: 0-0.04%, S: 0-0.05%, V: 0.15 to 0.25%, Ti: 0.05-0.2%, and the balance of iron and other inevitable impurities; the pearlite content in the matrix structure of the brake drum is not less than 95%, the A-type graphite content in the graphite form is not less than 85%, the graphite length is 4-5 grades, the tensile strength of the brake drum is 290-370 MPa, the hardness is HB 200-265, and the brake drum has high strength and high wear resistance.
2. The brake drum of the vanadium-titanium cast iron with high strength and high wear resistance as claimed in claim 1, wherein the brake drum is cast by a precoated sand process, molten iron is smelted by using 50-90 parts by weight of natural vanadium-titanium pig iron, 0-20 parts by weight of scrap steel and 10-30 parts by weight of foundry returns as main raw materials, the molten iron is subjected to composition quenching and twice inoculation, and then poured into a casting mold, and the casting temperature is 1350-1380 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110808413.2A CN113584374A (en) | 2021-07-16 | 2021-07-16 | High-strength and high-wear-resistance vanadium-titanium cast iron brake drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110808413.2A CN113584374A (en) | 2021-07-16 | 2021-07-16 | High-strength and high-wear-resistance vanadium-titanium cast iron brake drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113584374A true CN113584374A (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110808413.2A Pending CN113584374A (en) | 2021-07-16 | 2021-07-16 | High-strength and high-wear-resistance vanadium-titanium cast iron brake drum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113584374A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116292686A (en) * | 2023-04-03 | 2023-06-23 | 山西汤荣机械制造股份有限公司 | Microalloyed bimetal composite brake drum and manufacturing method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU461151A1 (en) * | 1972-11-27 | 1975-02-25 | Государственный Специализированный Трест По Ремонту,Монтажу Технологического Оборудования И Сооружений И Наладочным Работам | Cast iron |
| SU815064A1 (en) * | 1978-12-18 | 1981-03-23 | Белорусский Ордена Трудового Крас-Ного Знамени Политехнический Институт | Cast iron |
| SU931784A1 (en) * | 1981-03-12 | 1982-05-30 | Белорусский Ордена Трудового Красного Знамени Политехнический Институт | Cast iron |
| CN1641248A (en) * | 2004-12-07 | 2005-07-20 | 王义波 | Nodular cast iron piston ring |
| CN101781734A (en) * | 2010-04-12 | 2010-07-21 | 四川省富邦钒钛制动鼓有限公司 | Vanadium-titanium cast iron and production method thereof |
| CN103993221A (en) * | 2014-05-26 | 2014-08-20 | 四川省富邦钒钛制动鼓有限公司 | Vanadium titanium cast iron brake drum and preparation method thereof |
| CN104141090A (en) * | 2014-08-08 | 2014-11-12 | 四川省富邦钒钛制动鼓有限公司 | Automobile brake drum and manufacturing method thereof |
| CN104532107A (en) * | 2014-12-09 | 2015-04-22 | 四川省富邦钒钛制动鼓有限公司 | Vanadium-titanium vermicular cast iron brake drum and manufacture method thereof |
| CN106367676A (en) * | 2016-11-03 | 2017-02-01 | 广西大学 | Vanadium-titanium wear resistant cast iron and preparation method thereof |
| CN106435126A (en) * | 2016-11-03 | 2017-02-22 | 广西大学 | Heat treatment method of vanadium-titanium wear-resistant cast iron |
-
2021
- 2021-07-16 CN CN202110808413.2A patent/CN113584374A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU461151A1 (en) * | 1972-11-27 | 1975-02-25 | Государственный Специализированный Трест По Ремонту,Монтажу Технологического Оборудования И Сооружений И Наладочным Работам | Cast iron |
| SU815064A1 (en) * | 1978-12-18 | 1981-03-23 | Белорусский Ордена Трудового Крас-Ного Знамени Политехнический Институт | Cast iron |
| SU931784A1 (en) * | 1981-03-12 | 1982-05-30 | Белорусский Ордена Трудового Красного Знамени Политехнический Институт | Cast iron |
| CN1641248A (en) * | 2004-12-07 | 2005-07-20 | 王义波 | Nodular cast iron piston ring |
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| CN103993221A (en) * | 2014-05-26 | 2014-08-20 | 四川省富邦钒钛制动鼓有限公司 | Vanadium titanium cast iron brake drum and preparation method thereof |
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| CN106367676A (en) * | 2016-11-03 | 2017-02-01 | 广西大学 | Vanadium-titanium wear resistant cast iron and preparation method thereof |
| CN106435126A (en) * | 2016-11-03 | 2017-02-22 | 广西大学 | Heat treatment method of vanadium-titanium wear-resistant cast iron |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116292686A (en) * | 2023-04-03 | 2023-06-23 | 山西汤荣机械制造股份有限公司 | Microalloyed bimetal composite brake drum and manufacturing method thereof |
| CN116292686B (en) * | 2023-04-03 | 2024-04-30 | 山西汤荣机械制造股份有限公司 | Microalloyed bimetal composite brake drum and manufacturing method thereof |
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Application publication date: 20211102 |
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