CN102102165B - Alloy structural steel material for brake discs of high-speed motor train unit vehicles - Google Patents
Alloy structural steel material for brake discs of high-speed motor train unit vehicles Download PDFInfo
- Publication number
- CN102102165B CN102102165B CN2010101735168A CN201010173516A CN102102165B CN 102102165 B CN102102165 B CN 102102165B CN 2010101735168 A CN2010101735168 A CN 2010101735168A CN 201010173516 A CN201010173516 A CN 201010173516A CN 102102165 B CN102102165 B CN 102102165B
- Authority
- CN
- China
- Prior art keywords
- percent
- steel material
- structural steel
- steel
- alloy structural
- 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.)
- Expired - Fee Related
Links
Abstract
The invention discloses an alloy structural steel material for brake discs of high-speed motor train unit vehicles, which belongs to the technical field of materials for brake discs. The alloy structural steel material comprises the following chemical components in percentage by weight: 0.26 to 0.30 percent of carbon, 0.8 to 1.0 percent of silicon, 0.7 to 0.9 percent of manganese, 0.9 to 1.0 percent of chromium, 0.6 to 0.8 percent of nickel, 0.2 to 0.4 percent of molybdenum, 0.01 to 0.02 percent of tungsten, 0.09 to 1.0 percent of vanadium, 0.07 to 0.08 percent of niobium, less than 0.2 percent of phosphorus, less than 0.1 percent of sulfur, and the balance of iron. The alloy structural steel material solves the problem of thermal crack damage of the conventional brake disc friction surface due to poor heat conductivity, and meanwhile, the brake disc material has enough thermal fatigue performance, high and stable friction coefficient, good abrasion resistance and thermal cracking resistance and light weight.
Description
Technical field
The invention belongs to retarding disc and use the material technology field, particularly a kind of alloy structure steel that is used for the EMU automobile brake disc.
Background technology
Bullet train has become the developing direction of China railways communications, and disc braking is the main mode of braking of current bullet train.Along with EMU speed improves constantly, material material, fatigue lifetime and the safe reliability of retarding disc are had higher requirement.Yet the present employed disc material of China is scrapped thereby under big braking power, be prone to produce heat crack because of thermal capacity is not enough because thermal conductivity is relatively poor, can not well satisfy the requirement of current EMU.Therefore the disc material that is applicable to EMU of developing a kind of excellent performance has as early as possible become the task of top priority.Under the damped condition that the EMU train speed is high and operational conditions is abominable, cf-and damping force when retarding disc receives high speed rotating influence, and huge braking thermal load and thermal shocking simultaneously causes very high thermograde; Thereby bring very high thermal stresses; The surface of friction pair temperature is very high when braking at a high speed, therefore for satisfying brake material has been proposed weight reduction, improves heat-resisting cracking; Increase the service life and strengthen requirements such as safe reliability; Must adopt structural alloy steel, and have following performance: the intensity that (1) is enough, the pressure of brake lining when cf-and braking when bearing high speed rotating; (2) high and stable frictional coefficient is to reach good braking effect; (3) abrasion resistance properties preferably is to reduce the wearing and tearing that produce because of strong friction between card and brake lining; (4) heat crack resistance preferably, good accumulation of heat property does not crack retarding disc under sharp thermal quench condition; (5) enough hot strength and thermal fatigue strength, thus satisfy the requirement in work-ing life of retarding disc; (6) good friction resistant thermal deformation behavior and high thermal conductivity; (7) lighter weight is to alleviate unsprung mass.
Summary of the invention
The purpose of this invention is to provide a kind of alloy structure steel that is used for the EMU automobile brake disc, it is characterized in that this alloy structure steel is main strengthening element, and rationally cooperates with chemical element silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, niobium with low-sulfur, low-phosphorous, high-carbon; The Chemical Composition of this alloy structure steel and each composition weight percent are following: carbon (C) is 0.26～0.30%, and silicon (Si) is 0.8～1.0%, and manganese (Mn) is 0.7～0.9%; Chromium (Cr) is 0.9～1.0%, and nickel (Ni) is 0.6～0.8%, and molybdenum (Mo) is 0.2～0.4%; Tungsten (W) is 0.01～0.02%; Vanadium (V) is 0.09～1.0%, and niobium (Nb) is 0.07～0.08%, phosphorus (P)＜0.2%; Sulphur (S)＜0.1%, all the other are iron (Fe).
The effect of above-mentioned element in brake disk material:
(1) carbon (C): carbon content increases in the steel, and yield-point and tensile strength raise, but plasticity and impact reduction, carbon amount height also can reduce the atmospheric corrosion resistance ability of steel; In addition, carbon can increase the cold shortness and the timeliness susceptibility of steel.
(2) silicon (Si): in steelmaking process, add silicon as reductive agent and reductor, if silicon content surpasses 0.50～0.60% in the steel, even if the silicon alloying element.Silicon can significantly improve the elastic limit of steel, yield-point and tensile strength, but plasticity and impact reduce.
(3) manganese (Mn): in steelmaking process, manganese is good reductor and sweetening agent, contains manganese 0.30～0.50% in the general steel.Even if in carbon steel, add 0.70% when above " manganese steel ", the steel of general manganese amount not only has enough toughness, and higher intensity and hardness are arranged, and the quenching property of raising steel is improved the hot workability of steel.The manganese amount increases, and weakens the resistance to corrosion of steel.
(4) chromium (Cr): chromium can improve intensity, hardness and wear resistance, but reduces plasticity and toughness simultaneously, and chromium can improve the hot strength of steel again, is the important alloying element of high temperature steel.
(5) nickel (Ni): nickel can improve the normal temperature strength and the hot strength of steel, and keeps good plasticity and toughness, and nickel has higher corrosion resistance to soda acid, at high temperature has antirust and temperature capacity.
(6) molybdenum (Mo): molybdenum can make the grain refining of steel, improves hardening capacity and heat resistance ability, when high temperature, keeps enough intensity and creep resisting abilities (at high temperature receive stress for a long time and deform, claim creep).Add molybdenum in the steel, can improve mechanical property, can also suppress the fragility that steel alloy causes owing to tempering.
(7) tungsten (W): tungsten is the strong carbide forming element, but adds an amount of tungsten thinning microstructure crystal grain in the steel, improves intensity and toughness.The wolfram varbide fusing point is high, at high temperature stops grain growth, thereby improves the hot strength of material.
(8) vanadium (V): vanadium is the good reductor of steel.But add an amount of vanadium thinning microstructure crystal grain in the steel, improve intensity and toughness.The carbide that vanadium and carbon form can improve anti-hydrogen-type corrosion ability under HTHP.
(9) niobium (Nb): niobium can be separated out a large amount of even dispersion distributions, regular shape, high firmness, dystectic niobium carbide hard phase; The matrix of material is strengthened, and mechanical property is improved, and fatigue resistence improves; Wear resistance, match grinding property get a new look, and effect is obvious.
The present invention is used for the structural alloy steel preparation methods of EMU automobile brake disc: 1. according to the founding method of retarding disc schedule drawing and design, make sand mold appearance; 2. choose required sand material, carry out mulling according to proportioning; 3. apperance is placed sandbox, accomplish modeling process through operations such as moulding, moldings; 4. be in the medium-frequency induction furnace of 150kg at capacity, adopt basic electric arc furnace oxidation smelting technology fusing molten steel, the C in the strict control steel, Si, P, the content of S, the pouring molten steel that melting is accomplished in die cavity, cooling; 5. open sandbox, take out foundry goods, during thermal treatment, foundry goods is heated to 800-900 ℃, insulation 1～2h (normalizing), insulation 1～2h (tempering) during air cooling to 400～450 ℃ then, stove is cold, heat-treats the back foundry goods is carried out shaping; 6. check foundry goods whether qualified.
Beneficial effect of the present invention is: thus the present invention makes the retarding disc surface of friction that in the past existed cause the problem of thermal crack damage to improve because of thermal conductivity is relatively poor; Make disc material have enough thermal fatigue properties simultaneously; High and frictional coefficient stably; Advantages of good abrasion and heat crack resistance, lighter weight.
Embodiment
Below in conjunction with embodiment the present invention is described further:
According to the composition scope that is used for the alloy structure steel of EMU automobile brake disc of the present invention; We are according to the structural alloy steel preparation methods; Confirm each metallic element the content melting produce the required steel alloy of retarding disc; The physical strength of test gained alloy, the composition and the performance of alloy are as shown in table 1.
The composition of table 1 alloy and performance
In the foregoing description, in laboratory examination and real running, the retarding disc measured temperature reaches more than 600 ℃, and crackle and tangible loss do not appear in retarding disc.
Claims (1)
1. alloy structure steel that is used for the EMU automobile brake disc, it is characterized in that the Chemical Composition of said alloy structure steel and each composition weight percent are following: carbon (C) is 0.27%, and silicon (Si) is 0.96%, and manganese (Mn) is 0.75%; Chromium (Cr) is 0.95%, and nickel (Ni) is 0.7%, and molybdenum (Mo) is 0.28%; Tungsten (W) is 0.02%, and vanadium (V) is 1.0%, and niobium (Nb) is 0.08%; Phosphorus (P) is 0.008%, and sulphur (S) is 0.003%, and all the other are iron (Fe).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101735168A CN102102165B (en) | 2010-05-10 | 2010-05-10 | Alloy structural steel material for brake discs of high-speed motor train unit vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101735168A CN102102165B (en) | 2010-05-10 | 2010-05-10 | Alloy structural steel material for brake discs of high-speed motor train unit vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102102165A CN102102165A (en) | 2011-06-22 |
| CN102102165B true CN102102165B (en) | 2012-07-11 |
Family
ID=44155228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101735168A Expired - Fee Related CN102102165B (en) | 2010-05-10 | 2010-05-10 | Alloy structural steel material for brake discs of high-speed motor train unit vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102102165B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105755398B (en) * | 2014-12-13 | 2017-11-07 | 江苏鼎泰工程材料有限公司 | A kind of brake disc of high-speed train |
| CN107760992A (en) * | 2017-10-30 | 2018-03-06 | 马钢(集团)控股有限公司 | A kind of tungstenic brake disc of high-speed train steel |
| CN108716516B (en) * | 2018-05-15 | 2020-06-26 | 汶上海纬机车配件有限公司 | Arc-shaped radiating strip alloy steel brake disc and manufacturing method thereof |
| CN109127731B (en) * | 2018-08-13 | 2019-10-22 | 林州凤宝管业有限公司 | A method of promoting rolling mill guide service life |
| CN111500940B (en) * | 2020-06-08 | 2020-10-16 | 南京工程学院 | Alloy steel forged brake disc with friction spark inhibiting characteristic and manufacturing method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3336573B2 (en) * | 1994-11-04 | 2002-10-21 | 新日本製鐵株式会社 | High-strength ferritic heat-resistant steel and manufacturing method thereof |
| FR2733516B1 (en) * | 1995-04-27 | 1997-05-30 | Creusot Loire | STEEL AND PROCESS FOR THE MANUFACTURE OF PARTS WITH HIGH ABRASION RESISTANCE |
| JP3566162B2 (en) * | 1999-12-24 | 2004-09-15 | 山陽特殊製鋼株式会社 | Hot tool steel with excellent weldability |
| KR100845633B1 (en) * | 2004-04-28 | 2008-07-10 | 제이에프이 스틸 가부시키가이샤 | Component for machine structural use and method for making the same |
| CN101519754B (en) * | 2008-11-28 | 2010-07-21 | 北京纵横机电技术开发公司 | Alloy steel for braking discs |
-
2010
- 2010-05-10 CN CN2010101735168A patent/CN102102165B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102102165A (en) | 2011-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103510024B (en) | For the alloy cast steel of brake disc of high-speed train and heat treatment method thereof and the brake disc of high-speed train manufactured by this alloy cast steel | |
| CN105483508B (en) | Brake disc for railway vehicle alloy vermicular cast iron and its method of smelting | |
| CN103352170B (en) | Alloy wrought steel and production method thereof and application | |
| CN101519754B (en) | Alloy steel for braking discs | |
| CN108048753A (en) | A kind of rail vehicle brake disc low-alloy steel and its heat treatment method | |
| CN102102165B (en) | Alloy structural steel material for brake discs of high-speed motor train unit vehicles | |
| CN105755398B (en) | A kind of brake disc of high-speed train | |
| CN103526125B (en) | A kind of semisteel roll and manufacture method thereof | |
| CN103614634B (en) | Alloy spring silk and preparation method thereof | |
| CN107746915B (en) | A kind of brake disc of high-speed train steel | |
| CN106566999A (en) | Wear-resisting material used for brake disc of high-speed train and preparation method for wear-resisting material | |
| CN103146988B (en) | Highly thermal-fatigue resistant alloy and spheroidal graphite cast iron glass mold material and preparation method thereof | |
| CN103589962A (en) | Composite wear-resistant material obtained by casting method and preparation method of composite wear-resistant material | |
| CN102953007A (en) | Alloy cast steel, heat treatment method thereof, and truck traction buffer device manufactured from alloy cast steel | |
| CN101880815B (en) | Alloy vermicular cast iron for brake disks of urban rail transit vehicles and railway locomotives | |
| CN109385573A (en) | Brake disc of high-speed train alloy cast steel material and preparation method thereof | |
| CN107760838A (en) | A kind of brake disc of high-speed train Heat-Treatment of Steel method | |
| CN101736191A (en) | Insert material for heat-resisting ductile iron stamping die | |
| CN106702252A (en) | High-temperature wear-resistant alloy steel material and preparation method thereof | |
| CN103469083B (en) | Heat-resistant cast steel and application thereof | |
| CN107760992A (en) | A kind of tungstenic brake disc of high-speed train steel | |
| CN105779893A (en) | Alloy cast steel used for high-speed train brake disc and high-speed train brake disc manufactured through alloy cast steel | |
| CN101440454A (en) | Wear resistant cast iron | |
| CN101555570B (en) | High-chromium-nickel quinary alloy casting and production process thereof | |
| CN102978518A (en) | Rare earth wear-resisting alloy steel and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20180510 |