CN110819882A - Novel composite material suitable for automobile wheel hub mold - Google Patents
Novel composite material suitable for automobile wheel hub mold Download PDFInfo
- Publication number
- CN110819882A CN110819882A CN201810894962.4A CN201810894962A CN110819882A CN 110819882 A CN110819882 A CN 110819882A CN 201810894962 A CN201810894962 A CN 201810894962A CN 110819882 A CN110819882 A CN 110819882A
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- China
- Prior art keywords
- cast iron
- composite material
- white cast
- material suitable
- chromium white
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
- B21C25/025—Selection of materials therefor
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- 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
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
- C21D1/20—Isothermal quenching, e.g. bainitic hardening
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- 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)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to the technical field of materials, in particular to a novel composite material suitable for an automobile hub die, which takes high-chromium white cast iron and waste steel which are composed of elements in a specific proportion as main raw materials, wherein the high-chromium white cast iron comprises metal elements such as Cr, Mo and Cu, the mass fractions of the Cr, the Mo and the Cu are respectively 15-26 Cr, 0.8-1.4Mo and 0.4-0.8Cu, the proportion of the high-chromium white cast iron to the waste steel is 120-130:1, and an isothermal quenching process is adopted in a heat treatment process after modification treatment by adopting a rare earth silicon alloy.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a novel composite material suitable for an automobile hub die.
Background
The automobile hub and the cylindrical metal part which is used for supporting the tire and takes the shaft as the center in the tire of the automobile are the parts for mounting the axle at the center of the wheel, and are important parts for connecting a brake drum (brake disc), a wheel disc and a half shaft. The automobile hub is an important component of automobile parts, and the hub industry gradually develops and develops along with the growth of the automobile parts industry in China. The automobile sales volume in China is expected to be continuously and stably increased in the next few years, and development opportunities are provided for the automobile hub industry.
The automobile industry in the world is developing towards light weight, high speed, safety, energy conservation, comfort and light environmental pollution, so that the amount of aluminum alloy parts used in automobiles is increasing. The hub is one of the important parts in the automobile running system, and is also a safety part with high requirements, which not only bears the weight of the automobile, but also reflects the appearance and shape of the automobile. Over the past 10 years, the annual average growth rate of the global aluminum alloy automobile hub production reaches 7.6%.
At present, the method for manufacturing the aluminum alloy wheel hub at home and abroad is mainly divided into two categories: one is extrusion method, the other is casting, but the casting method has serious defects of shrinkage cavity, looseness, air holes and the like in products, low mechanical strength and low yield, and is basically eliminated abroad. Traditional extrusion die all adopts overall structure, and adopts the forging alloy die steel mostly, and not only the cost is high, the process is complicated, and the wearability is general moreover, and the precision descends rapidly along with the increase of number of times of use, consequently, selects the material that is used for automobile wheel hub mould extremely important.
Disclosure of Invention
The invention aims to solve the existing problems and provides a wear-resistant novel composite material suitable for an automobile hub die.
The invention adopts the following specific technical scheme:
a novel composite material suitable for automobile hub molds is prepared from high-chromium white cast iron and waste steel which are composed of elements in specific proportion as main raw materials, wherein the high-chromium white cast iron comprises metal elements such as Cr, Mo and Cu, the mass fractions of Cr, Mo and Cu are respectively 15-26 Cr and 0.8-1.4Mo, the mass fraction of 0.4-0.8Cu is 120-130:1, and the isothermal quenching process is adopted in the heat treatment process after modification treatment is carried out on rare earth silicon alloy.
The invention further improves that the mass fraction of the rare earth silicon alloy adopted in the process of modifying the rare earth silicon alloy is 0.3-0.6.
The invention is further improved in that the heat treatment process adopts an isothermal quenching process, the quenching heating temperature is 1050 ℃, the isothermal temperature is controlled at 280-360 ℃, and the product is cooled to the room temperature after 0.8-1.5 h.
The invention further improves that the high-chromium white cast iron also comprises the following components of C, Mn, P and S, and the mass fractions of the components are 3.7-3.8C, 0.65-0.70Mn, 0.01-0.02P and 0.01-0.015S respectively.
Compared with the prior art, the invention has the following advantages: in order to solve the problems that the existing automobile hub die is high in manufacturing cost and cannot achieve ideal effects in mechanical properties, the invention utilizes high-chromium white cast iron and scrap steel as main raw materials, adds metal and non-metal components as die materials, can change the texture structure of cast iron, improves the mechanical properties of the materials, and reduces the processing and manufacturing cost by about 20-25%.
Detailed Description
In order to enhance the understanding of the present invention, the present invention will be described in further detail with reference to the following examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
The first embodiment is as follows: a novel composite material suitable for an automobile hub die is prepared by taking high-chromium white cast iron and waste steel which are composed of elements in specific proportion as main raw materials, wherein the high-chromium white cast iron comprises Cr, Mo and Cu metal elements, the mass fractions of Cr, Mo and Cu are respectively 15 Cr and 0.8Mo, the ratio of 0.4Cu high-chromium white cast iron to waste steel is 120:1, isothermal quenching is adopted in a heat treatment process after modification treatment is carried out on a rare earth silicon alloy, the mass fraction of the rare earth silicon alloy adopted in the modification treatment process of the rare earth silicon alloy is 0.3, the heat treatment process adopts an isothermal quenching process, the quenching heating temperature is 1050 ℃, the isothermal temperature is controlled at 300 ℃, and the high-chromium white cast iron is cooled to room temperature after 1.0h, and further comprises the following component elements of C, Mn, P and S, wherein the mass fractions of the components are respectively 3.7C, 0.65Mn, 0.01P and 0.01S.
Example two: a novel composite material suitable for an automobile hub die is prepared by taking high-chromium white cast iron and waste steel which are composed of elements in specific proportion as main raw materials, wherein the high-chromium white cast iron comprises metal elements such as Cr, Mo and Cu, the mass fractions of Cr, Mo and Cu are respectively 26 Cr, 1.4Mo, and the proportion of 0.8Cu high-chromium white cast iron to waste steel is 130:1, isothermal quenching is adopted in a heat treatment process after modification treatment is carried out on a rare earth silicon alloy, the mass fraction of the rare earth silicon alloy adopted in the modification treatment process of the rare earth silicon alloy is 0.6, the heat treatment process adopts an isothermal quenching process, the quenching heating temperature is 1050 ℃, the isothermal temperature is controlled at 360 ℃, and the high-chromium white cast iron is cooled to room temperature after 1.5h, and further comprises the following component elements such as C, Mn, P and S, wherein the mass fractions of the components are respectively 3.8C, 0.70Mn, 0.02P and 0.015S.
The production process of the high-chromium white cast iron in the above examples 1 and 2 is as follows:
(1) determining the mass ratio of Cr, Mo and Cu metal elements according to the mass fraction requirement of the high-chromium white cast iron, determining the proportioning relation of the Cr, Mo and Cu metal elements, and batching;
(2) adding rare earth silicon alloy which accounts for 0.2-0.5 wt% of the molten iron into a casting ladle, and crushing the rare earth silicon alloy into small blocks for later use;
(3) heating pig iron in a medium-frequency induction furnace until the pig iron is melted, adding rare earth silicon alloy which accounts for 0.2-0.5 wt% of molten iron into a ladle after the molten iron is molten down, sequentially adding Cr, Mo and Cu metal elements, and further melting down;
(4) after aluminum wires are adopted for deoxidation, pouring molten iron into a casting ladle containing small blocky rare earth silicon alloy, and carrying out modification and deslagging treatment;
(5) when the temperature of the molten iron is 1050 ℃, pouring the molten iron into a sodium silicate sand mold or a lost foam sand mold for casting molding to obtain high-chromium white cast iron;
(6) placing the high-chromium white cast iron in a heat treatment furnace for heat treatment, and specifically comprising the following steps: quenching, uniformly heating the heat treatment furnace to 280 plus 360 ℃ at the temperature of less than 200 ℃/h, preserving the heat, discharging the product from the furnace for spray quenching or forced air cooling to room temperature after 0.8 to 1.5 hours.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The novel composite material suitable for the automobile hub die is characterized in that high-chromium white cast iron and waste steel which are composed of elements in specific proportion are used as main raw materials, the high-chromium white cast iron comprises metal elements including Cr, Mo and Cu, the mass fractions of the Cr, the Mo and the Cu are respectively 15-26 Cr, 0.8-1.4Mo and 0.4-0.8Cu, the proportion of the high-chromium white cast iron to the waste steel is 120-plus-130: 1, and an isothermal quenching process is adopted in a heat treatment process after modification treatment is carried out on rare earth silicon alloy.
2. The novel composite material suitable for the automobile hub mold according to claim 1, wherein the rare earth silicon alloy is adopted in the modification treatment process of the rare earth silicon alloy, and the mass fraction of the rare earth silicon alloy is 0.3-0.6.
3. The novel composite material suitable for the automobile hub mold as claimed in claim 1, wherein the heat treatment process adopts an isothermal quenching process, the quenching heating temperature is 1050 ℃, the isothermal temperature is controlled at 280-360 ℃, and the composite material is cooled to room temperature after 0.8-1.5 h.
4. The novel composite material suitable for the automobile hub mold as claimed in any one of claims 1 to 3, wherein the high-chromium white cast iron further comprises the following component elements C, Mn, P and S, and the mass fractions of the components are respectively 3.7-3.8C, 0.65-0.70Mn, 0.01-0.02P and 0.01-0.015S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810894962.4A CN110819882A (en) | 2018-08-08 | 2018-08-08 | Novel composite material suitable for automobile wheel hub mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810894962.4A CN110819882A (en) | 2018-08-08 | 2018-08-08 | Novel composite material suitable for automobile wheel hub mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110819882A true CN110819882A (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810894962.4A Pending CN110819882A (en) | 2018-08-08 | 2018-08-08 | Novel composite material suitable for automobile wheel hub mold |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5183518A (en) * | 1989-05-01 | 1993-02-02 | Townley Foundry & Machine Co., Inc. | Cryogenically super-hardened high-chromium white cast iron and method thereof |
| CN102851570A (en) * | 2012-03-14 | 2013-01-02 | 宁波市圣盾机械制造有限公司 | High-carbon high-chromium refining plate casting of defibrator |
| CN104032207A (en) * | 2013-03-08 | 2014-09-10 | Lg电子株式会社 | Spline hub for clutch and manufacturing method thereof |
| CN105154760A (en) * | 2015-10-09 | 2015-12-16 | 梅州五指石科技有限公司 | Nodular cast iron material for truck hub and preparation method thereof |
| CN106086607A (en) * | 2016-08-24 | 2016-11-09 | 安徽省安工机械制造有限公司 | A kind of production technology of high-chromium white cast iron |
| CN106591689A (en) * | 2016-11-15 | 2017-04-26 | 营口龙辰矿山车辆制造有限公司 | Hypereutectic high-chromium alloy white cast iron chute lining plate and preparation method thereof |
| CN107299178A (en) * | 2017-07-28 | 2017-10-27 | 何兰 | A kind of production technology of white cast-iron |
| CN107760978A (en) * | 2017-09-30 | 2018-03-06 | 句容市武杭传动机械制造有限公司 | A kind of production technology of white cast-iron |
-
2018
- 2018-08-08 CN CN201810894962.4A patent/CN110819882A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5183518A (en) * | 1989-05-01 | 1993-02-02 | Townley Foundry & Machine Co., Inc. | Cryogenically super-hardened high-chromium white cast iron and method thereof |
| CN102851570A (en) * | 2012-03-14 | 2013-01-02 | 宁波市圣盾机械制造有限公司 | High-carbon high-chromium refining plate casting of defibrator |
| CN104032207A (en) * | 2013-03-08 | 2014-09-10 | Lg电子株式会社 | Spline hub for clutch and manufacturing method thereof |
| CN105154760A (en) * | 2015-10-09 | 2015-12-16 | 梅州五指石科技有限公司 | Nodular cast iron material for truck hub and preparation method thereof |
| CN106086607A (en) * | 2016-08-24 | 2016-11-09 | 安徽省安工机械制造有限公司 | A kind of production technology of high-chromium white cast iron |
| CN106591689A (en) * | 2016-11-15 | 2017-04-26 | 营口龙辰矿山车辆制造有限公司 | Hypereutectic high-chromium alloy white cast iron chute lining plate and preparation method thereof |
| CN107299178A (en) * | 2017-07-28 | 2017-10-27 | 何兰 | A kind of production technology of white cast-iron |
| CN107760978A (en) * | 2017-09-30 | 2018-03-06 | 句容市武杭传动机械制造有限公司 | A kind of production technology of white cast-iron |
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Application publication date: 20200221 |
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