CN102453842A - Special alloy steel and method for high-speed rail turnout integral sliding bedplate - Google Patents
Special alloy steel and method for high-speed rail turnout integral sliding bedplate Download PDFInfo
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Abstract
The invention which relates to novel special alloy steel, and concretely relates to special alloy martensite stainless steel and a method for preparing a high-speed rail turnout integral sliding bedplate from the stainless steel belongs to the technical field of novel material preparations and applications thereof. The special alloy steel comprises the following chemical components, by weight, equal to or less than 0.10% of C, equal to or less than 1.5% of Si, equal to or less than 1.5% of Mn, equal to or less than 0.03% of P, equal to or less than 0.03% of S, 12.5-15.5% of Cr, 1-2% of Ni, a certain amount of Nb, 0.05-0.2% of W, 0.0003-0.0005% of B, 0.02-0.04% of N, and the balance Fe, wherein the amount of Nb is 3-5 times the amount of C. The method is carried out with integral casting one-time forming. According to the invention, defects of the processing technology complexity and the short service life caused by the adoption of easily abraded common carbon steel and the welding of three parts in the prior art are offset. The integral sliding bedplate of the invention, which successfully replaces split-welded sliding bedplates, has the characteristics of high strength, good abrasion resistance, corrosion resistance and no rust, no deformation, and short production period. So, the method which can satisfy essential conditions for the streamline production is very suitable for the large batch production.
Description
Technical field
The present invention relates to a kind of new special steel alloy, exactly is a kind of Special Alloy Steel Martensite Stainless Steel and with the method for the whole sliding bed platen of this material prepn high-speed railway track switch, belongs to novel material preparation and applied technical field.
Background technology
The whole sliding bed platen of high-speed railway track switch of the prior art adopts plain carbon stool, and at the wearing layer of its surface weldering one deck carbofrax material, thickness generally has only about 0.15mm.But, receive very big restriction duration of service because wearing layer is too thin.The structure of above-mentioned platen is welded by three parts.Owing to be two kinds of material welding, be easy to generate welding flaw and crackle during welding, so weld bond to be detected a flaw all.Exist the complete processing complicacy, be difficult for grasping the defective that work-ing life is short.
Summary of the invention
The objective of the invention is the deficiency to above-mentioned prior art, and provide a kind of intensity high, not only wear-resisting and but also rustless special alloy Martensite Stainless Steel and adopt the method for the whole sliding bed platen of high-speed railway track switch of this material prepn.The present invention has adopted adding Nb, W etc. to strengthen the solid solution alloy element; Produce sosoloid elements such as NbC and WC with the C element in the steel alloy; Changed the state that C exists in alloy substrate, formed the particle that column NbC is hard, be distributed in and played wear-resisting effect in the alloy substrate.In alloy, add alloying elements such as Cr and Ni again, and make material satisfy the high and rustless requirement of intensity.
The objective of the invention is to realize through following technical proposals: a kind of Special Alloy Steel, (mass percent %) is formed: C≤0.10 by following chemical ingredients; Si≤1.5; Mn≤1.5; P≤0.03; S≤0.03; Cr 12.5-15.5; Ni 1-2; Nb 3 * C to 5 * C; W 0.05-0.2; B 0.0003-0.0005; N 0.02-0.04, surplus is Fe.
The whole sliding bed platen of the high-speed railway track switch that adopts above-mentioned chemical ingredients to make, also need pass through following thermal treatment before the machining:
(1) carry out normalizing treatment: heating is 1080 ℃ ± 10 ℃ in the stove, is incubated 2-3 hour, air cooling.
(2) carry out temper: 580 ℃ ± 10 ℃ to 650 ℃ ± 10 ℃ insulations of heating are 4-5 hour in the stove, air cooling.
Mechanical property after bakingout process is following:
Tensile strength: more than the 750Mpa.
Ys: more than the 550Mpa.
Unit elongation: 12-15%.
Hardness: 280-350HB.
Making the whole sliding bed platen of high-speed railway track switch with above-mentioned special alloy Martensite Stainless Steel is the method that adopts the monoblock casting once-forming, and this method is described below:
1, confirms founding method.
2, mould reduced scale, process redundancy confirm that number of molds ， order mould gradient is confirmed.
3, wax pattern preparation: confirm injection wax pattern time 10-40S, temperature 40-50 ℃, pressure 0.5-0.6Mpa, the wax pattern dimensional inspection will be proofreaied and correct if any distortion.
4, assembly welding: confirm the assembly welding technique flow process, welding is wanted firmly, and is neat.
5, formative method: adopt composite shell casting method process following:
(1) sticking shell: check modulus of water glass, sand, powder seed degree, dope viscosity.Hanging thickness of the shell wants evenly.Hanging shell will be by the process for making shell flow operations.
(2) poach dewaxing: dewaxing temperature 90-98 ℃, require cast gate not have scab, air-dry time 10-12 hour.
6, melting technology flow process: fusion process is melting in intermediate frequency furnace.
(1) Chemical Composition control: 11 kinds of elements such as spectral test C, Si, Mn, S, P, source recording files.
(2) control with raw material method: purchase alloy strip laboratory test report, will chemically examine the Chemical Composition of furnace charge before starting material use, prepare burden by the single given charger sheet of technology.
(3) tapping temperature: 1620-1600 ℃.
7, casting cycle is following:
(1) pouring temperature: 1580-1600 ℃.
(2) shell pours and will put insulating covering agent.
(3) burn the shell temperature: 800-850 ℃.
(4) casting quantity: keep a record.
(5) coupon casting quantity: keep a record.
8, blank dimensional inspection: degree of being deformed into inspection, whether with proofreading and correct, measure non-working position with model.
9, process for machining process:
(1) processing of sliding bed platen by drawing.
(2) machine tool accuracy detects.
(3) detect the dimensional precision of sliding the bed platen.
(4) detecting the size form fills in.
Characteristics of the present invention are:
(1) the present invention has not only solved on material and has been suitable for the sliding bed of high-speed railway track switch block cast platen and has also invented and have HS, good wear resistance and erosion resistance non-corrosive, in use exempt from oiling.
(2) adopted the heat treatment quenching and tempering treatment process to replace the way that former surface high frequency quenching improves hardness, body hardness can reach 280-350HB.
(3) the composite shell precision casting process has solved problems such as the deflection that sodium silicate shell is prone to is big, smooth finish difference.The dimensional requirement and the accuracy requirement that have reached the sliding bed of high-speed railway track switch block cast platen of success.
(4) whole sliding bed platen can replace the sliding bed platen of traditional split welding.Among the present invention this material is applied to monoblock casting once-forming on the whole sliding bed platen of high-speed railway track switch, has successfully replaced the sliding bed platen of split welding.This sliding bed platen can directly carry out just can directly having used after the vulcanization of rubber.Also solved simultaneously because the precision problem and the welding distortion problem of the related size of secondary processing.
(5) comparison through above whole sliding bed platen and the sliding bed of welding platen and the test of the whole sliding bed platen of Special Alloy Steel and test proved that the whole sliding bed platen of Special Alloy Steel is feasible can be satisfied with the high-speed railway requirements on transport, can replace welding a sliding bed platen.
(6) because whole sliding bed platen simple in structure, globality is strong, the little easy control of deflection, and machining processes is few, and is with short production cycle, withholds size and platen to rail support groove relative position size as long as guarantee cartridge clip.Therefore can satisfy the essential condition that flow line is produced, be fit to very much produce in enormous quantities.
Description of drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is that the A-A of Fig. 1 is to sectional view
Fig. 3 is preparing method's process frame chart of the present invention.
Embodiment
Whether the present invention can reach the mechanical property of actual requirement, most critical be that modifier treatment is also named in thermal treatment, below just 3 kinds of mechanical propertys that same material different heat treatment temperature draws are described with 3 kinds of instances.
Embodiment 1
Special Alloy Steel, (mass percent, %) composition: C 0.096 by following chemical ingredients; Si 0.624; Mn 0.611; P 0.026; S 0.007; Cr 13.05; Ni 1.87; Nb 0.21; W 0.093; B 0.00023; N 0.021, and surplus is Fe.
The foundry goods that conforms to above-mentioned chemical ingredients, coupon are put into cabinet-type electric furnace and are heat-treated:
(1) normalizing treatment: heating is 1080 ℃ ± 10 ℃ in the stove, is incubated 2-3 hour, again coupon is put into well-type electric furnace behind the air cooling and carries out tempering heat treatment;
(2) temper: 580 ℃ ± 10 ℃ insulations of heating are 4-5 hour in the stove, air cooling.
Mechanical property is following;
Tensile strength: more than the 961Mpa
Ys: more than the 620Mpa
Unit elongation: 12.511.813 (making 3 coupons)
Hardness: 343HB
(3) conclusion:
Performance is qualified basically, the hard partially processing difficulties of hardness.
Special Alloy Steel, by following chemical ingredients (mass percent, %) form:
C 0.081; Si 0.82; Mn 0.75; P 0.022; S 0.008; Cr 12.75; Ni 1.85; Nb 0.22; W 0.11; B 0.0004; N 0.02, and surplus is Fe.
The foundry goods that conforms to above-mentioned chemical ingredients and coupon are put into cabinet-type electric furnace heat-treats:
(1) normalizing treatment: heating is 1080 ℃ ± 10 ℃ in the stove, is incubated 2-3 hour, again coupon is put into well-type electric furnace behind the air cooling and carries out tempering heat treatment;
(2) temper: 620 ℃ ± 10 ℃ insulations of heating are 4-5 hour in the stove, air cooling.Mechanical property is following;
Tensile strength: more than the 870Mpa
Ys: more than the 590Mpa
Unit elongation: 1313.213.9 (making 3 coupons)
Hardness: 283HB
(3) conclusion:
Performance is qualified.
Special Alloy Steel, (mass percent %) is formed: C0.070 by following chemical ingredients; Si 0.86; Mn 0.91; P 0.018; S 0.006; Cr 12.75; Ni2.1; Nb 0.25; W 0.089; B 0.0003; N 0.03, and surplus is Fe.
The foundry goods coupon that conforms to above-mentioned chemical ingredients is put into cabinet-type electric furnace heat-treats:
(1) normalizing treatment: (electric furnace) heating is 1080 ℃ ± 10 ℃ in the stove, is incubated 2-3 hour, again coupon is put into well-type electric furnace behind the air cooling and heat-treats;
(2) quench treatment: 650 ℃ ± 10 ℃ insulations of heating are 4-5 hour in the stove, cool to room temperature in the oil of quenching.
(3) temper: 280 ℃ ± 10 ℃ insulations of heating are 4-5 hour in the stove, air cooling.
Mechanical property is following;
Tensile strength: more than the 840Mpa
Ys: more than the 560Mpa
Unit elongation: 14 14.2 13.1 (making 3 coupons)
Hardness: 276HB
(4) conclusion:
Performance is qualified.
Adopting the described Special Alloy Steel of embodiment 1-3 to prepare the whole sliding bed platen of high-speed railway track switch is the method that adopts the monoblock casting once-forming.This method realizes (with reference to Fig. 3) through following process step.
1, founding method is confirmed, makes main points and confirms that management project is confirmed.
2, mould reduced scale, process redundancy confirm that number of molds ， order mould gradient is confirmed.
3, wax pattern preparation: confirm injection wax pattern time 10-40S, temperature 40-50 ℃. pressure 0.5-0.6Mpa, wax pattern dimensional inspection.
4, assembly welding: confirm the assembly welding technique flow process, welding is wanted firmly, and is neat.
5, formative method adopts the composite shell casting method, and process is following:
(1) sticking shell: check modulus of water glass, sand, powder seed degree, dope viscosity.The extension thickness of the shell is even. and hang shell, press the process for making shell flow operations.
(2) poach dewaxing:. dewaxing temperature 90-98 ℃, require cast gate not have scab, air-dry time 10-12 hour.
6, melting technology flow process: fusion process is to use the intermediate frequency furnace melting.
(1) Chemical Composition control: 11 kinds of elements such as spectral test C, Si, Mn, S, P, source recording files.
(2) control with raw material method: purchase alloy strip laboratory test report, will chemically examine the Chemical Composition of furnace charge before starting material use, prepare burden by the single given charger sheet of technology.
(3) tapping temperature: 1620-1600 ℃.
(4) registration heat number.
7, casting cycle is following:
(1) pouring temperature: 1580-1600 ℃.
(2) shell pours and will put insulating covering agent.
(3) burn 800-850 ℃ of shell temperature.
(4) casting quantity: keep a record.
(5) coupon casting quantity.Keep a record
8, blank dimensional inspection: degree of being deformed into inspection, whether with proofreading and correct, with the non-working position of model amount.
9, process for machining process:
(1) processing of sliding bed platen by drawing
(2) machine tool accuracy detects.
(3) detect the dimensional precision of sliding the bed platen.
(4) detecting the size form fills in.
Whole slide plate is processed by following requirement:
(1) plane on the sliding bed platform: long 352-0.5, wide 140 processing, polishing;
(2) 770-3 * 180 base plate bottom surfaces and all processing all around;
(3) inclined-plane, 162+1 place (1: 40) processing between iron seat and the sliding bed platform;
(4) leave 2 the interior platform sizes in 90 wide fabrication hole places and be respectively (greatly) 48.6 ± 0.2, (little) 51.8 ± 0.2 processing;
(5) sliding bed director 288.5 ± 0.5 openings wide 40 places processing;
The hole of (6) 2
is by dimensioned in the table;
(7) all the other are not processed without exception.
Casting technique: adopt casting method, composite shell technology.Use middle frequency furnace fusing molten steel.Problems such as the big 720mm of size of the sliding bed of block cast platen is long, and 180mm is wide, and the middle cavity dimensional requirement that sliding bed platform is connected with base plate is strict, can not process again, and foundry goods requires not allow any distortion, and is rough occur.Therefore this patent has adopted the resistant to elevated temperatures again packing material of a kind of good permeability (resistant to elevated temperatures refractory mortar and water glass), is filled in the cavity.Problems such as non-processing emphasis size distortion have been solved.
Adopt the composite shell process method, not only solved the surface smoothness of foundry goods.Also effectively raise the dimensional precision of foundry goods.
The structure of the sliding bed of the integral body of above-mentioned preparation platen is with reference to attaching Fig. 1 and 2.Whole sliding bed platen is partly formed by 7.Be shaped on fixed orifices 1 and 2 on the base plate 7, it also leaves fabrication hole 5.Said base plate 7 is provided with sliding bed platform 4, and sliding bed platform 4 is that critical part is provided with workplace 6.Also install iron seat 3 on the said base plate 7 simultaneously.
During use, on the sliding bed platform 4 rail is installed and is slidably reciprocated, that is to say that track switch will be moved.
Claims (7)
1. a Special Alloy Steel is characterized in that (mass percent %) is formed: C≤0.10 by following chemical ingredients for it; Si≤1.5; Mn≤1.5; P≤0.03; S≤0.03; Cr 12.5-15.5; Ni 1-2; Nb 3 * C to 5 * C; W 0.05-0.2; B 0.0003-0.0005; N 0.02-0.04, surplus is Fe.
2. adopt Special Alloy Steel as claimed in claim 1 to prepare the method for the whole sliding bed platen of high-speed railway track switch, it is characterized in that this method adopts the monoblock casting once-forming, concrete steps:
A, confirm founding method;
B, Mould Machining;
C, wax pattern preparation: confirm injection wax pattern time 10-40S, temperature 40-50 ℃, pressure 0.5-0.6Mpa, wax pattern dimensional inspection;
D, assembly welding: confirm the assembly welding technique flow process, welding is wanted firmly, and is neat;
E, formative method adopt the composite shell casting method, and process is following:
(1) sticking shell: check modulus of water glass, sand, powder seed degree, dope viscosity.Hang thickness of the shell and want evenly to hang shell, press the process for making shell flow operations;
(2) poach dewaxing: dewaxing temperature 90-98 ℃, require cast gate not have scab, air-dry time 10-12 hour;
F, melting technology flow process: fusion process is to use electrosmelting of intermediate frequency;
(1) Chemical Composition control: 11 kinds of elements such as spectral test C, Si, Mn, S, P, source recording files;
(2) control with raw material method: purchase alloy strip laboratory test report, will chemically examine the Chemical Composition of furnace charge before starting material use, prepare burden by the single given charger sheet of technology;
(3) tapping temperature: 1620-1600 ℃;
G, casting cycle are following:
(1) pouring temperature: 1580-1600 ℃;
(2) shell pours and will put insulating covering agent;
(3) burn 800-850 ℃ of shell temperature;
(4) casting quantity: keep a record;
(5) coupon casting quantity keeps a record;
H, blank dimensional inspection: degree of being deformed into inspection, whether with proofreading and correct, measure non-working position with model;
J, process for machining process:
(1) processing of sliding bed platen by drawing;
(2) machine tool accuracy detects;
(3) detect the dimensional precision of sliding the bed platen;
(4) detecting the size form fills in.
3. Special Alloy Steel as claimed in claim 2 is made the method for the whole sliding bed platen of high-speed railway track switch, it is characterized in that: the high-speed railway track switch that adopts above-mentioned chemical ingredients to make, also need pass through following thermal treatment before the machining:
(1) carry out normalizing treatment: heating is 1080 ℃ ± 10 ℃ in the stove, is incubated 2-3 hour, air cooling;
(2) carry out temper: 580 ℃ ± 10 ℃ or 650 ℃ ± 10 ℃ insulations of heating are 4-5 hour in the stove, air cooling.
4. Special Alloy Steel as claimed in claim 1 is characterized in that: (mass percent, %) composition: C 0.096 by following chemical ingredients for it; Si 0.624; Mn 0.611; P 0.026; S 0.007; Cr 13.05; Ni 1.87; Nb 0.21; W 0.093; B 0.00023; N 0.021, and surplus is Fe, the foundry goods that conforms to above-mentioned chemical ingredients and coupon put into cabinet-type electric furnace heat-treat:
(1) normalizing treatment: heating is 1080 ℃ ± 10 ℃ in the stove, is incubated 2-3 hour, again coupon is put into well-type electric furnace behind the air cooling and heat-treats;
(2) temper: 580 ℃ ± 10 ℃ insulations of heating are 4-5 hour in the stove, air cooling.
5. Special Alloy Steel as claimed in claim 1 is characterized in that: (mass percent, %) composition: C 0.081 by following chemical ingredients for it; Si 0.82; Mn 0.75; P 0.022; S 0.008; Cr 12.75; Ni 1.85; Nb 0.22; W 0.11; B 0.0004; N 0.02, and surplus is Fe, the foundry goods that conforms to above-mentioned chemical ingredients and coupon put into cabinet-type electric furnace heat-treat:
(1) normalizing treatment: heating is 1080 ℃ ± 10 ℃ in the stove, is incubated 2-3 hour, again foundry goods and coupon is put into well-type electric furnace behind the air cooling and heat-treats;
(2) temper:, 620 ℃ ± 10 ℃ insulations of heating are 4-5 hour in the stove, air cooling.
6. Special Alloy Steel as claimed in claim 1 is characterized in that: (mass percent %) is formed: C0.070 by following chemical ingredients for it; Si 0.86; Mn 0.91; P 0.018; S 0.006; Cr 12.75; Ni 2.1; Nb 0.25; W 0.089; B 0.0003; N 0.03, and surplus is Fe;
The foundry goods that conforms to above-mentioned chemical ingredients and coupon are put into cabinet-type electric furnace heat-treats:
(1) normalizing treatment: (electric furnace) heating is 1080 ℃ ± 10 ℃ in the stove, is incubated 2-3 hour, again foundry goods and coupon is put into well-type electric furnace behind the air cooling and heat-treats;
(2) quench treatment: 650 ℃ ± 10 ℃ insulations of heating are 4-5 hour in the stove, cool to room temperature in the oil of quenching.
(3) temper: 280 ℃ ± 10 ℃ insulations of heating are 4-5 hour in the stove, air cooling.
7. Special Alloy Steel as claimed in claim 2 is made the method for the whole sliding bed platen of high-speed railway track switch; It is characterized in that: adopt the sliding bed of the prepared integral body of this method platen, its structure is partly formed by 7, is shaped on fixed orifices (1) and (2) on the base plate (7); It also leaves fabrication hole (5); Said base plate (7) is provided with sliding bed platform (4), and sliding bed platform (4) is provided with workplace (6), also installs iron seat (3) on the said base plate (7) simultaneously.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104452488A (en) * | 2014-11-25 | 2015-03-25 | 辽宁恒泰铁路器材制造有限公司 | Bimetal liquid fusion covering and die forging turnout sliding table and manufacturing method thereof |
| CN105297554A (en) * | 2015-11-06 | 2016-02-03 | 中国铁建重工集团有限公司 | Rigid buckling and pressing type sliding bed board assembly and rigid buckling and pressing type sliding bed board |
| CN105543647A (en) * | 2015-12-15 | 2016-05-04 | 安徽楚江特钢有限公司 | High-strength special steel alloy and preparation process thereof |
| CN105839477A (en) * | 2016-04-21 | 2016-08-10 | 王泽红 | Manufacturing method of composite sliding bed bedplate |
| CN107747063A (en) * | 2017-11-29 | 2018-03-02 | 郑州永通特钢有限公司 | A kind of high tough martensitic stain less steel |
| CN110656283A (en) * | 2018-11-07 | 2020-01-07 | 锦州捷通铁路机械股份有限公司 | High-strength martensitic stainless steel for high-speed railway turnout sliding bed bedplate |
| CN112029965A (en) * | 2020-08-11 | 2020-12-04 | 江苏常宝普莱森钢管有限公司 | Novel super 13Cr annealing method |
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| CN101861407A (en) * | 2007-09-10 | 2010-10-13 | 奥贝特迪瓦尔公司 | Martensite Stainless Steel, by the production method of its parts of making and the parts of producing thus |
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| CN1509342A (en) * | 2001-04-04 | 2004-06-30 | V&M������˾ | Steel and steel pipe for high-temp. use |
| CN101861407A (en) * | 2007-09-10 | 2010-10-13 | 奥贝特迪瓦尔公司 | Martensite Stainless Steel, by the production method of its parts of making and the parts of producing thus |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104452488A (en) * | 2014-11-25 | 2015-03-25 | 辽宁恒泰铁路器材制造有限公司 | Bimetal liquid fusion covering and die forging turnout sliding table and manufacturing method thereof |
| CN105297554A (en) * | 2015-11-06 | 2016-02-03 | 中国铁建重工集团有限公司 | Rigid buckling and pressing type sliding bed board assembly and rigid buckling and pressing type sliding bed board |
| CN105543647A (en) * | 2015-12-15 | 2016-05-04 | 安徽楚江特钢有限公司 | High-strength special steel alloy and preparation process thereof |
| CN105839477A (en) * | 2016-04-21 | 2016-08-10 | 王泽红 | Manufacturing method of composite sliding bed bedplate |
| CN107747063A (en) * | 2017-11-29 | 2018-03-02 | 郑州永通特钢有限公司 | A kind of high tough martensitic stain less steel |
| CN107747063B (en) * | 2017-11-29 | 2019-08-23 | 郑州永通特钢有限公司 | A kind of high tough martensitic stain less steel |
| CN110656283A (en) * | 2018-11-07 | 2020-01-07 | 锦州捷通铁路机械股份有限公司 | High-strength martensitic stainless steel for high-speed railway turnout sliding bed bedplate |
| CN112029965A (en) * | 2020-08-11 | 2020-12-04 | 江苏常宝普莱森钢管有限公司 | Novel super 13Cr annealing method |
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Application publication date: 20120516 |