CN102676779A - Multiplex heat treatment technology of hanging plate spring of motor of high-speed locomotive - Google Patents
Multiplex heat treatment technology of hanging plate spring of motor of high-speed locomotive Download PDFInfo
- Publication number
- CN102676779A CN102676779A CN2012101123777A CN201210112377A CN102676779A CN 102676779 A CN102676779 A CN 102676779A CN 2012101123777 A CN2012101123777 A CN 2012101123777A CN 201210112377 A CN201210112377 A CN 201210112377A CN 102676779 A CN102676779 A CN 102676779A
- Authority
- CN
- China
- Prior art keywords
- heat treatment
- temperature
- plate spring
- less
- hanging plate
- 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
Links
Images
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a multiplex heat treatment technology of a hanging plate spring of a motor of a high-speed locomotive. The heat treatment technology comprising the steps of 1), preparing the following materials by mass: 0.46-0.50% of C, 0.27-.37% of Si, 0.6-0.8% of Mn, less than 0.015% of P, less than 0.015% of S, 0.90-1.10% of Cr and 0.10-0.16% of V; smelting in an electric-arc furnace to obtain blank material with thickness of not less than 22mm and width of not less than 80mm; rolling the blank material in a variable cross-section rolling mill, wherein rolling temperature is 1150-1200 DEG C, and finish rolling temperature is 1050 DEG C; 2), treating the hanging plate spring by quenching, tempering and multi-component permeation. The invention provides a method for testing the hanging plate spring of which performance is ensured after multiplex heat treatment. According to the hanging plate spring of the motor of the high-speed locomotive obtained by the technology, in comparison with the same kind of foreign products, the bending fatigue property is improved by 20%; the surface hardness is improved by 80%; and the corrosion resistance is improved by 20 times.
Description
Technical field
The invention belongs to metallic substance thermal treatment, especially preparing method's technical field of express locomotive motor suspention laminated spring.
Background technology
Motor suspention laminated spring is the key part of China's high-speed locomotive steering frame more than 350 kilometers/hour.When laminated spring moves at express locomotive, stand laterally and the repeated load of vertical both direction, fatigue property is the mechanical property of laminated spring most critical.The fatigue lifetime of laminated spring itself and assembling, processing etc. have substantial connection, wherein guarantee that through heat treatment technics the fatigue property of laminated spring is the link of most critical.Heat treatment technics is unreasonable, will greatly reduce the laminated spring fatigue property.Heat treatment technics for motor suspention laminated spring belongs to the key core technology abroad, and technical know-how is carried out in strictness.This patent obtains the fatigue property of the combined heat treatment technical guarantee motor suspention laminated spring material of employing quenching+average tempering+multiple permeation through a large amount of tests.
Summary of the invention
In view of the present situation of prior art, the object of the present invention is to provide to be used for the express locomotive motor suspention a kind of novel composite heat treating process of laminated spring and the corresponding method of inspection, make it to have fatigue property and the high advantage of Corrosion Protection.
The objective of the invention is to realize through following means.
A kind of express locomotive motor suspention laminated spring combined heat treatment technology, comprise following process step: comprise following process step: 1) material is by mass percentage: C:0.46-0.50%;
Si:0.27-0.37%; Mn:0.6-0.8%; P:＜0.015%; S:＜0.015%; Cr:0.90-1.10%; V:0.10-0.16%; Through electric arc furnace smelting and rolling after obtain thickness and be not less than 22mm, width is not less than 80mm base material; Gained base material is rolled through the variable cross-section milling train, rolling temperature 1150-1200 ℃; 1050 ℃ of finishing temperatures; 2) adopting quenching+tempering+multiple permeation disposable plates spring.Quenching heating process Heating temperature: 10-100 ℃ of 870 ℃ ± 5 ℃ heat-eliminating medium use temperature.Tempering temperature: 470-480 ℃.Multiple permeation heating process Heating temperature: 460-480 ℃, heat-up time: 1.5-2.0 hour, ammonia usage: 0.3m
3/ h, additive (C, S, O element) mixes consumption: 0.2m
3/ h.And detection method after the check motor suspention laminated spring combined heat treatment proposed.
The product that the present invention's technology is made is compared with external similar laminated spring product, and the flexural fatigue performance improves 20%, reaches 900-1000MPa; Surface hardness HV0.05 improves 80%, reaches HV
0.05800-700; Anti-neutral salt spray corrosive nature improves 20 times, reaches through 168 hours salt-fog tests to keep 7 grades.
Description of drawings is following:
500 times of metallographic structure figure after the quenching+tempering of Fig. 1 laminated spring.
Fig. 2 laminated spring is through 500 times of metallographic structure figure after quenching+tempering+multiple permeation combined heat treatment.
Equipment and control principle figure that the unnecessary coinfusion technology of Fig. 3 is implemented.
Embodiment
Process step:
1) material by mass percentage: C:0.46-0.50%; Si:0.27-0.37%; Mn:0.6-0.8%; P:＜0.015%; S:＜0.015%; Cr:0.90-1.10%; V:0.10-0.16%; Behind electric arc furnace smelting, obtain thickness and be not less than 22mm, width is not less than 80mm base material; Gained base material is rolled through the variable cross-section milling train, rolling temperature 1150-1200 ℃; Finishing temperature-1050 ℃.
2) adopting quenching+tempering+multiple permeation disposable plates spring.Quenching heating process Heating temperature: 10-100 ℃ of 870 ℃ ± 5 ℃ heat-eliminating medium use temperature.Tempering temperature: 470-480 ℃.Multiple permeation heating process Heating temperature: 460-480 ℃, heat-up time: 1.5-2.0 hour, ammonia usage: 0.3m
3/ h; Additive amount: 0.2m
3/ h.
Embodiment
1. heating and process for cooling quench
The quenching heating process
Heating temperature: 870 ℃ ± 5 ℃; Soaking time: 10 of batches and following 60min; Heat-eliminating medium and cooling apparatus: cooling apparatus must be furnished with stirring or cooling back installation, and the coolant temperature scope is no more than table 1 regulation.
Table 1 coolant temperature scope
| Quenching refrigerating device | Heat-eliminating medium use temperature ℃ | Remarks |
| The organic solution groove | 10-40 | Workpiece is vertically gone into groove |
| Oil groove | 10-100 | Workpiece is vertically gone into groove |
Can adopt the cooling of oil cooling or organic quenchant, (full name is " polymkeric substance water-soluble quenching medium " model AQUA-QUENCH 251 to adopt 251 quenchants; Composition mainly is to gather alkylene glycols macromolecular compound, antirust, the etch-proof additive of inner adding.Production company: Houghton (Shanghai) advanced industrial medium ltd.Concentration is 15%; Concentration should adopt refractometer to measure weekly.Cooling tank is installed whipping appts.Adopt the hardness of the direct assay plate spring of Leeb Hardness Tester after quenching, require hardness to be not less than 55HRC.If adopt the heat of trueing add to adopt oil cooling or air cooling; The back hardness that must guarantee to quench is not less than 56HRC;
2. tempering process
Tempering temperature: 470-480 ℃, tempering time: 10 of batches and following 60min; 10-20 spare 70min, tempering cooling: air cooling.Adopt the hardness of the direct assay plate spring of Leeb Hardness Tester after the tempering, require durometer level 44-46HRC.
Tissue after the quenching+tempering should be typical tempering troostite tissue, and typical gold phase constitution photo is seen Fig. 1.
3. multiple permeation is handled
Adopt well formula resistance closed type process furnace or box resistance closed type process furnace; Size of burner hearth is unsuitable excessive, for well formula multiple permeation stove useful space Φ 500mm * 800mm.Adopting process furnace must be furnished with fan stirs.Infiltrate unit and have N, C, S, O; Wherein N is decomposed by ammonia provides; All the other elements are contained in the liquid medium; Put into polynary confession permeation body generating unit (19), adopt the ZL95241793.6 patented technology, multiple element blended liquid starting material is become gas raw material; Under the effect that gets into this device air, get in the stove through intake ducting.
Heating temperature: 470 ℃; Heat-up time: 2.0 hours; Ammonia usage: 0.3m
3/ h; Addition of C consumption: 0.2m
3/ h.Adding is with 3 size 10 * 10 * 5mm of stove sample; Cooling: air cooling, as check metallographic structure sample.
Equipment and control principle that multi element copermeation technology is implemented are seen Fig. 3.
Mainly form by several parts such as multiple permeation heat treatment furnace, electrical control cabinet 5, computer control cabinet 6, additive housing 7, gas housing 8, gas cylinder 9, multiple permeation gas device 19; Wherein, are furnished with compositions such as the blower fan 1 of stirring, vapor pipe 3, SV 4, bell valve 20, inlet pipe 22 on the multiple permeation stove by the heating and the insulation of intelligent temperature instrument 11, solid state relay 12, thermopair 21 control multiple permeation stoves.Intelligent temperature instrument 11 is connected the realization microcomputer control with computingmachine 14, control process may be displayed on the indicating meter 13.Ammonia is provided by gas cylinder 9, through intelligent gas instrument 15 and variable valve 16 its flows of control.Through intelligent gas instrument 17 and variable valve 18 controls, elements such as C, S, O are provided by multiple permeation gas device 19 additive gas by air pump 10.Intelligent gas instrument 15, intelligent gas instrument 17 connect respectively at mainframe computer 14, realize time variable control.Referring to Fig. 3.
The intelligent control of multiple permeation treatment temperature is achieved in that to the laminated spring workpiece, utilizes mathematical model temperature and time as requested, the input computer system.Through temperature thermopair 21, the actual temperature that process furnace is measured collects in the data acquisition module, obtains concrete sometime Temperature numerical.These numerical value feed back to industrial computer 16 through instrument, A/D, D/A data transducer 14 with the temperature data of practical measurement respectively, analyze and calculate through data in the mathematical model of setting up, and judge whether to reach specified requirement in the technology.If the actual temperature in the process furnace is lower than the value of process stipulation, then computingmachine transmits signal to solid state relay through software, is that solid state relay is in on-state, prolongs power-on time, provides more energy to realize the rising of temperature.If temperature is higher than the value of regulation, then computingmachine with the signal conveys solid state relay, makes solid state relay be in closing condition through software; To cut off the electricity supply and supply power to process furnace; Outwards dispel the heat through body of heater, the heating chamber temperature is descended, thereby reach self-regulating purpose.
Multiple permeation is handled the hardness that the direct assay plate spring of Leeb Hardness Tester is adopted in the back, requires hardness to be in 44-46HRC.The metallographic structure of check sample requires compound layer to be controlled at the 3-5 micron simultaneously.Adopt the microhardness method to measure the Hardness Distribution curve.See Fig. 2 through metallograph after quenching+tempering+multiple permeation combined heat treatment.
Claims (2)
1. express locomotive motor suspention laminated spring combined heat treatment is technological, comprises following process step:
1) material by mass percentage: C:0.46-0.50; Si:0.27-0.37; Mn:0.6-0.8; P:＜0.015; S:＜0.015; Cr:0.90-1.10; V:0.10-0.16; Through electric arc furnace smelting and rolling after obtain being not less than 22mm, width is not less than 80mm base material; Gained base material is rolled through the variable cross-section milling train again, rolling temperature 1150-1200 ℃; 1050 ℃ of finishing temperatures;
2) adopt fire+tempering+multiple permeation disposable plates spring, quenching heating process Heating temperature: 10-100 ℃ of 870 ℃ ± 5 ℃ heat-eliminating medium use temperature; Tempering temperature: 470-480 ℃; Multi element copermeation technology Heating temperature: 460-480 ℃, heat-up time: 1.5-2.0 hour, ammonia usage: 0.3m
3/ h; Additive amount: 0.2m
3/ h.
2. according to the said express locomotive motor of claim 1 suspention laminated spring combined heat treatment technology, it is characterized in that: said under 460-480 ℃ of low temperature multi element copermeation technology add N, C, S, O element, to obtain 3-5 micron compound layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101123777A CN102676779A (en) | 2012-04-17 | 2012-04-17 | Multiplex heat treatment technology of hanging plate spring of motor of high-speed locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101123777A CN102676779A (en) | 2012-04-17 | 2012-04-17 | Multiplex heat treatment technology of hanging plate spring of motor of high-speed locomotive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102676779A true CN102676779A (en) | 2012-09-19 |
Family
ID=46809325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101123777A Pending CN102676779A (en) | 2012-04-17 | 2012-04-17 | Multiplex heat treatment technology of hanging plate spring of motor of high-speed locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102676779A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109348665A (en) * | 2018-12-07 | 2019-02-15 | 南京铁道职业技术学院 | A kind of electric system communication equipment |
| CN109778067A (en) * | 2019-02-18 | 2019-05-21 | 西南交通大学 | A kind of preparation method of sleeper spring |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109953A (en) * | 1993-08-13 | 1995-10-11 | 蒙诺泵有限公司 | Flexible drive shaft and method of production thereof |
-
2012
- 2012-04-17 CN CN2012101123777A patent/CN102676779A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109953A (en) * | 1993-08-13 | 1995-10-11 | 蒙诺泵有限公司 | Flexible drive shaft and method of production thereof |
Non-Patent Citations (3)
| Title |
|---|
| 《2003全国小型钢生产技术交流会论文》 20031231 孙永杰等 50CrVA弹簧扁钢的试制 第32-35页 1-2 , * |
| 孙永杰等: "50CrVA弹簧扁钢的试制", 《2003全国小型钢生产技术交流会论文》 * |
| 宛杰魁等: "气体氮碳共渗在汽油机气门弹簧上的应用", 《现代车用动力》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109348665A (en) * | 2018-12-07 | 2019-02-15 | 南京铁道职业技术学院 | A kind of electric system communication equipment |
| CN109348665B (en) * | 2018-12-07 | 2020-09-25 | 南京铁道职业技术学院 | Communication equipment for electric power system |
| CN109778067A (en) * | 2019-02-18 | 2019-05-21 | 西南交通大学 | A kind of preparation method of sleeper spring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101270404B (en) | Method for producing special fastener | |
| CN102409144B (en) | Continuous type alloy steel heat treatment line | |
| CN102796965B (en) | Rolling mill support roll steel and heat treatment technology thereof | |
| CN101984139A (en) | Carburizing method for wind power gear used for wind power generation | |
| CN101660165A (en) | Heat treatment process of preparing bearing roller by using G20CrNi2MoA steel instead of G20Cr2Ni4A steel | |
| CN104328249B (en) | A kind of heat treatment method of the full hollow half axle of automobile | |
| CN101942617A (en) | Novel corrosion resistant, wear resistant and high temperature resistant alloy material and production process thereof | |
| CN102643975B (en) | Heat treatment method for grain refinement of NiCrMoV steel forging piece | |
| CN102676779A (en) | Multiplex heat treatment technology of hanging plate spring of motor of high-speed locomotive | |
| CN102605150B (en) | Quenching liquid and quenching technology for improving through quenching thickness of 50CrVA spring steel | |
| CN103911493A (en) | Forged NiCrMoV steel piece heat-treatment method and forged piece | |
| CN102699645B (en) | Isothermal normalizing process for gear of wind driven generator | |
| CN105695931A (en) | Chromium plating process for small shaft parts | |
| CN103614521B (en) | Medium carbon steel material large diesel engine output shaft tempering process | |
| CN105274297B (en) | Domestic GMH20 mould steel vacuum heat treatment process | |
| XIAO et al. | Hydrogen embrittlement behavior of a vacuum-carburized gear steel | |
| CN101899559B (en) | Manufacturing method of high strength bumper for automobile side-door | |
| CN202865299U (en) | Microcomputer integrated whole-process control system for thermal treatment process | |
| CN102392106A (en) | Heat treatment process of 30CrMnSiA alloy constructional steel | |
| CN103643003A (en) | Normal pressure quenching furnace and quenching method | |
| CN108707727A (en) | 42CrMo round steel heat treatment process | |
| CN102071299B (en) | Method for preparing high-performance nanocrystalline spring steel sheet | |
| CN110144532A (en) | A kind of medium high carbon saw blade steel Fresh Quenching Process and its medium and high carbon steel saw blade | |
| CN205443374U (en) | Annealing stove centralized control system | |
| CN104726650A (en) | Water-air-water quenching heat treatment process for T10 steel screw taps for machines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |
|
| WD01 | Invention patent application deemed withdrawn after publication |