CN101748344A - Railway track welded steel and manufacturing technology thereof - Google Patents
Railway track welded steel and manufacturing technology thereof Download PDFInfo
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- CN101748344A CN101748344A CN200810238159A CN200810238159A CN101748344A CN 101748344 A CN101748344 A CN 101748344A CN 200810238159 A CN200810238159 A CN 200810238159A CN 200810238159 A CN200810238159 A CN 200810238159A CN 101748344 A CN101748344 A CN 101748344A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000005516 engineering process Methods 0.000 title claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 24
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 17
- 239000001257 hydrogen Substances 0.000 claims abstract description 17
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 238000007670 refining Methods 0.000 claims abstract description 12
- 238000005242 forging Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 21
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 8
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- 229910001566 austenite Inorganic materials 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005275 alloying Methods 0.000 abstract description 5
- 239000004615 ingredient Substances 0.000 abstract description 4
- 239000006104 solid solution Substances 0.000 abstract description 4
- 238000007689 inspection Methods 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 abstract 2
- 150000002431 hydrogen Chemical class 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 11
- 239000011572 manganese Substances 0.000 description 9
- 239000011651 chromium Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- 238000003801 milling Methods 0.000 description 6
- 229910000617 Mangalloy Inorganic materials 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000000137 annealing Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 230000002929 anti-fatigue Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
The invention discloses a railway track welded steel and a manufacturing technology thereof and mainly comprises the contents of chemical ingredients of the railway track welded steel, matching proportions of raw materials and the manufacturing technology thereof; the railway track welded steel contains the chemical ingredients of: 0.05-0.13 of C; not more than 0.3 of Si; 4-7 of Mn; 16-20 of Cr; 10-13 of Ni; 0.9-2.0 of Mo; not more than 0.02 of P; not more than 0.01 of S; 0.1-0.3 of Ti; not more than 0.15 of Cu; and 57.09-68.95 of Fe. The manufacturing technology of the railway track welded steel comprises the procedures: determining the selection range of chemical ingredients-working out a matching proposal according to the range of chemical ingredients-medium frequency smelting-electroslag remelting (refining)-annealing-discharging-forging-hydrogen diffusion treatment-solid solution treatment-mechanical processing-inspection test; the key manufacturing technology comprises the steps: (1) electroslag remelting (refining), (2) forging, (3) hydrogen diffusion treatment, and (4) solid solution treatment; the railway track welded steel is reasonable in matching chemical ingredients, good in alloying effect, large in the change of forging ratio and excellent in tightness of microstructure, and completely adapts to the occasion of heavy track, heavy load and large variation of temperature difference. The railway track welded steel has high indexes of performance, and the index of welding performance guarantees the quality of welded joints and the traveling safety of trains. Various indexes of performance of the product reach or exceed those of domestic and oversea similar products.
Description
Technical field
The invention belongs to technical field of metallurgical manufacturing.
Background technology
Railway track welded steel is the welding that is used between railroad track rail and the High Manganese Steel Frog, this is because the material of rail and high mangaenese steel differs greatly, the former is a carbon steel, the latter is high carbon high manganese steel, both structural states are different besides, the former is a rolling state, and the latter is an as-cast condition.Owing to these reasons, cause that welding property differs greatly between rail and the high mangaenese steel, also can be described as between the two and can not weld.But the development of transportation by railroad, high-speed overload is wanted in requirement, and want fool proof reliable, if seam bolt knot is arranged between rail and the high mangaenese steel, certainly will be to the speed of train operation, the security of weight-carrying capacity and operation, reliability has a negative impact, for with rail and firm the welding together of High Manganese Steel Frog, avoid having the seam bolt to tie the disadvantageous effect that is produced between the two, this just needs a kind of steel, it can firmly weld with rail, can firmly weld Here it is said railway track welded steel, its one section and rail welding again with High Manganese Steel Frog, the other end and high mangaenese steel welding, play the effect that middle transition connects, remove intermediate gap, for the operating safety of high-speed heavy-load trains provides material guarantee.
Railway track welded steel is used in the invention that taken the lead in of Australia, New Zealand, Japan and other countries, and its title call differs, and what have is weldable steel, and what have is excessive steel or the like, still acts on the same with purpose.Because these land scopes are little, have a narrow range of temperature, the weight-carrying capacity of train is light, be generally light rail and medium-sized rail is main, so their performance index are lower, are generally:
Tensile strength: σ b 570Mpa-590Mpa
Yield strength: σ s 270Mpa-290Mpa
(1) the Chemical Composition proportioning is unreasonable, the alloying weak effect;
Its chemical ingredients composition is generally: (%)
C：0.05-0.13；Si≤0.5；Mn：3-5；Cr：15-18；
Ni：8-12；Mo：0.5-1.5；P≤0.03；S≤0.03；Fe：62.81-73.45
(2) forging ratio is less than normal, generally about 3, causes the density of tissue relatively poor;
(3) smelting process does not have refining (as vacuum metling, esr etc.): σ s 270Mpa-290Mpa unit elongation: δ 5 35%-45%
Ballistic work: Aku 140J/cm
2-160J/cm
2
Hardness: HB 165-175
Anti-fatigue life: 2 * 10
6Inferior
Its reason is: the purity of steel is relatively poor, and gas content especially hydrogen richness is higher, generally at 1-2PPm.
(4) heat treating regime is unreasonable, and the solid solution effect is bad.
In addition, welding property and the gas content that influences welding property are explicitly called for.
Above-mentioned reason can produce following problem:
(1) performance index of body are low, can influence the safety of train operation.
(2) the welding property index is not done requirement, can influence weldquality.
(3) incompatibility heavy rail, heavy duty, occasion that difference variation is bigger.
Summary of the invention:
In order to overcome the deficiencies in the prior art, at transportation by railroad especially China railways at a high speed, heavy duty, safe target call and China's north and south temperature difference is big, the miscellaneous actual state of rail type, the invention provides a kind of railway track welded steel and manufacturing process, unreasonable to overcome prior art Chemical Composition proportioning, the alloying weak effect, forging ratio is less than normal, heat treating regime is unreasonable, the solid solution effect is bad, and the performance index of body are low, influences the safety of train operation; The welding property index is not done requirement, can influence weldquality; Incompatibility heavy rail, heavy duty, the problems such as occasion that difference variation is bigger.
The technical solution adopted for the present invention to solve the technical problems is that product Chemical Composition scope is optimized and innovated, and can make best proportion scheme according to different environments for use, and the Chemical Composition scope that adopts is: C:0.05-0.13; Si≤0.3; Mn:4-7; Cr:16-20; Ni:10-13; Mo:0.9-2.0; P≤0.02; S≤0.01; Ti:0.1-0.3 Cu≤0.15 Fe:57.09-68.95.
Its manufacturing process flow has increased refining and has expanded hydrogen and handle, and comprises following processing step: selected Chemical Composition scope-formulate proportion scheme-intermediate frequency smelting-esr (refining)-annealing-blanking-forging-expansion hydrogen processing-solution treatment-mechanical workout-check test according to the Chemical Composition scope.
The emphasis manufacturing process of this product is as follows
(1) esr (refining): adopt esr, improve the purity of steel.The electroslag remelting process parameter is:
A, slag system: adopt the plain non-standard slag system of quaternary, i.e. aluminum oxide 20%-35%, calcium oxide improves 10%-12%, and Calcium Fluoride (Fluorspan) improves 50%-60%, and silicon oxide reduces 3%-5%
B, the quantity of slag: improve the quantity of slag of esr, bring up to 100mm-120mm by the 80mm-100mm under the standard state.
C, electric current: the size of electric current has determined production efficiency and quality product, and the big more production efficiency of electric current is high more, and quality product is had a negative impact, so strength of current reduces 10%-12% than smelting conventional steel alloy.
D, voltage: voltage control is at 50V-60V, than smelting conventional steel alloy low 2%.
E, packing ratio: packing ratio is controlled between the 0.35-0.4, reduces about 10% than smelting conventional steel alloy.
F, crystallizer water temperature: crystallizer outlet water temperature is controlled between 30 ℃-60 ℃.
(2), forge: forging ratio 〉=8, wherein upset ratio 〉=4 help crystal grain thinning, improve tissue.Its processing parameter is:
A, heating: charging temperature≤400 ℃, be heated to 850 ℃ of insulations (by 0.25 minute/mm), rise to 1250 ℃ of insulations once more (by 0.3 minute/mm), be heated workpiece watch core temperature head≤30 ℃, heat-up rate≤10 ℃/minute.
B, initial forging temperature: 1200 ℃-1250 ℃.
C, terminal temperature: 900 ℃-950 ℃.
D, hammering strength: by light-weight-light principle.
(3) expanding hydrogen handles: in order to remove hydrogen and other content of harmful gas in the railway track welded steel, adopt the following hydrogen treatment process that expands:
T is by 2.5 minutes/mm, heat-up rate≤10 ℃/minute.(see figure 1)
(4), solution treatment: in order to obtain uniform austenite structure, improve etch resistant properties, the solution heat treatment technology of railway track welded steel is as follows:
T1 was by 0.25 minute/mm, and T2 was by 0.3 minute/mm.
Heat-up rate≤14 ℃/minute, water temperature≤80 ℃.(see figure 2)
Adopting positively effect of the present invention is the Chemical Composition reasonable ratio, and alloying is effective; It is big that forging ratio becomes, and the density of metal structure is good; Adapt to heavy rail, heavy duty, occasion that difference variation is bigger fully.The performance index height of body, its welding property index has guaranteed the safety of weldquality and train operation.Its product performance index has been done following improvement and increase, specifically:
Tensile strength: σ b 〉=600Mpa
Yield strength: σ s 〉=300Mpa
Unit elongation: δ 5 〉=50%
Ballistic work: Aku 〉=170J/cm
2(room temperature)
Aku≥130J/cm
2(-40℃)
Hardness: HB 〉=180
Anti-fatigue life: 2.2 * 10
6Inferior
Welding property: CE≤0.25%
PC≤0.25％
Embodiment
Embodiment (one)
With the welding of 60kg/M track, be used in minimum temperature-50 ℃ (being applicable to extremely frigid zones)
1, selected Chemical Composition scope: (%) C:0.05-0.09; Si≤0.3; Mn:4-5; Cr:16-17; Ni:12-13; Mo:1.1-1.5; P≤0.02; S≤0.01; Ti:0.1-0.15Cu≤0.15 Fe:62.79-65.85
2, formulate proportion scheme according to the Chemical Composition scope: electrolytic manganese 5%, electrolysis chromium 16.8%, pure nickel plate 12.8%, pure molybdenum bar 1.4%, pure titanium 0.13%, technically pure iron 63.87%.
Should test to above-mentioned starting material, its purity should not be lower than 99.9%.
3, intermediate frequency is smelted: use basic lining, toast before the use, and storing temperature 200-300 ℃, storing time 6-8 hour.Except that electrolytic manganese, all the other raw materials are put into stove.Coming out of the stove, first three put into stove with electrolytic manganese in ten minutes again.The preceding inspection by sampling of coming out of the stove, the inspection machine direct reading spectroscopic when assay meets the Chemical Composition requirement, is come out of the stove and is built, and tapping temperature 1580-1600 ℃, waters the electrode ingot that builds up Φ 300.Keep the stokehold sample.
4, esr (refining):
A, slag system are formed: aluminum oxide 50kg, calcium oxide 20kg, Calcium Fluoride (Fluorspan) 80kg, silicon oxide 5kg.
B, the quantity of slag: 120mm
C, electric current: striking current≤2000A, normal smelting electric current 8000-8500A, feeding electric current 3000-3500A.
D, voltage: voltage control is at 55V.
E, packing ratio: 0.36
F, crystallizer water temperature: crystallizer outlet water temperature is controlled between 40 ℃-60 ℃.
Hydrogen is expanded in g, steel ingot insulation: in time change the holding furnace insulation after the steel ingot depanning over to, holding temperature is controlled at 700-720 ℃, and soaking time is not less than 12 hours.
5, annealing:
T1＝2h，T2＝4h。
Heat-up rate≤14 ℃/minute.(see figure 3)
6, blanking: use the high speed band saw for metal, cutting stock weight 42kg/ spare.
7, forge:
A, forging ratio=8, wherein upset ratio 4, and upsetting pull is three times during base.
B, heating: charging temperature≤400 ℃, be heated to 850 ℃ of insulations (by 0.25 minute/mm), rise to 1250 ℃ of insulations once more (by 0.3 minute/mm), be heated workpiece watch core temperature head≤30 ℃, heat-up rate≤10 ℃/minute.
C, initial forging temperature: 1200 ℃-1250 ℃.
D, terminal temperature: 900 ℃-950 ℃.
E, hammering strength: by light-weight-light principle.
8, expanding hydrogen handles:
T 〉=12h, heat-up rate≤10 ℃/minute.(see figure 4)
9, solution heat treatment:
T1=1h, T2=3h, heat-up rate≤14 ℃/minute, water temperature≤50 ℃.(see figure 5)
10, mechanical workout: milling is machined to Standard Gauge type sectional dimension with profiling milling machine, and length is 300mm.
Above-mentioned composition prescription more helps the alloying effect in the smelting process.
11, check test:
A, physical dimension check:, meet the figure paper size and get final product with vernier callipers and model check.
B, UT (Ultrasonic Testing): test by GB/T74163-1984.
C, penetration testing: test by GB/T9443-2007.
D, performance test and gas content check: by 200 be a collection of, inspects 1 at random by random samples and makes a service test and the gas content check, qualifiedly then is judged to be batch qualifiedly, otherwise doubles to test.
Embodiment (two)
With the welding of 54kg/M track, environment for use temperature-10-40 ℃ (being applicable to damp-heat area)
1,, selected Chemical Composition scope: (%) C:0.08-0.12; Si≤0.3; Mn:5-6; Cr:17-18; Ni:10-11; Mo:0.9-1.2; P≤0.02; S≤0.01; Ti:0.2-0.3Cu≤0.15 Fe:62.9-66.82
2, formulate proportion scheme according to the Chemical Composition scope:
Electrolytic manganese 6%, electrolysis chromium 18%, pure nickel plate 11%, pure molybdenum bar 1.2%, pure titanium 0.25%, technically pure iron 63.55%
Should test to above-mentioned starting material, its purity should not be lower than 99.9%.
3, intermediate frequency is smelted: identical with application example 1.
4, esr (refining): identical with application example 1.
5, annealing: identical with application example 1.
6, blanking: use the high speed band saw for metal, cutting stock weight 39kg/ spare.
7, forge: identical with application example 1.
8, expanding hydrogen handles: identical with application example 1.
9, solution heat treatment: identical with application example 1.
10, mechanical workout:
Milling is machined to Standard Gauge type sectional dimension with profiling milling machine, and length is 300mm.
11, check test: identical with application example 1.
This product is stipulated the gas content that influences its performance: N≤60PPm H≤1PPm 0≤25PPm.
Pilot-gas content more helps improving welding property.
With the welding of 54kg/M track, environment for use temperature-10-40 ℃ (being applicable to damp-heat area)
1,, selected Chemical Composition scope: (%) C:0.08-0.12; Si≤0.3; Mn:5-6; Cr:17-18; Ni:10-11; Mo:0.9-1.2; P≤0.02; S≤0.01; Ti:0.2-0.3Cu≤0.15 Fe:62.9-66.82
2, formulate proportion scheme according to the Chemical Composition scope:
Electrolytic manganese 6%, electrolysis chromium 18%, pure nickel plate 11%, pure molybdenum bar 1.2%, pure titanium 0.25%, technically pure iron 63.55%
Should test to above-mentioned starting material, its purity should not be lower than 99.9%.
3, intermediate frequency is smelted: identical with application example 1.
4, esr (refining): identical with application example 1.
5, annealing: identical with application example 1.
6, blanking: use the high speed band saw for metal, cutting stock weight 39kg/ spare.
7, forge: identical with application example 1.
8, expanding hydrogen handles: identical with application example 1.
9, solution heat treatment: identical with application example 1.
10, mechanical workout:
Milling is machined to Standard Gauge type sectional dimension with profiling milling machine, and length is 300mm.
11, check test: identical with application example 1.
This product is stipulated the gas content that influences its performance: N≤60PPm H≤1PPm 0≤25PPm.
Pilot-gas content more helps improving welding property.
Claims (3)
1. a railway track welded steel mainly comprises railway track welded steel Chemical Composition content, composition of raw materials proportioning and manufacturing process, it is characterized in that according to different environments for use, makes best proportion scheme, and its Chemical Composition scope is: C:0.05-0.13; Si≤0.3; Mn:4-7; Cr:16-20; Ni:10-13; Mo:0.9-2.0; P≤0.02; S≤0.01; Ti:0.1-0.3 Cu≤0.15 Fe:57.09-68.95.
2. railway track welded steel manufacturing process, it is characterized in that this manufacturing process has increased refining and expanded the hydrogen processing, comprises following processing step: selected Chemical Composition scope-formulate proportion scheme-intermediate frequency smelting-esr (refining)-annealing-blanking-forging-expansion hydrogen processing-solution treatment-mechanical workout-check test according to the Chemical Composition scope.
3. according to the described railway track welded steel manufacturing process of claim 1, it is characterized in that the emphasis manufacturing process is as follows:
(1) esr (refining): adopt esr, improve the purity of steel.The electroslag remelting process parameter is:
A, slag system: adopt the plain non-standard slag system of quaternary, i.e. aluminum oxide 20%-35%, calcium oxide improves 10%-12%, and Calcium Fluoride (Fluorspan) improves 50%-60%, and silicon oxide reduces 3%-5%
B, the quantity of slag: improve the quantity of slag of esr, bring up to 100mm-120mm by the 80mm-100mm under the standard state.
C, electric current: the size of electric current has determined production efficiency and quality product, and the big more production efficiency of electric current is high more, and quality product is had a negative impact, so strength of current reduces 10%-12% than smelting conventional steel alloy.
D, voltage: voltage control is at 50V-60V, than smelting conventional steel alloy low 2%.
E, packing ratio: packing ratio is controlled between the 0.35-0.4, reduces about 10% than smelting conventional steel alloy.
F, crystallizer water temperature: crystallizer outlet water temperature is controlled between 30 ℃-60 ℃.
(2), forge: forging ratio 〉=8, wherein upset ratio 〉=4 help crystal grain thinning, improve tissue.Its processing parameter is:
A, heating: charging temperature≤400 ℃, be heated to 850 ℃ of insulations (by 0.25 minute/mm), rise to 1250 ℃ of insulations once more (by 0.3 minute/mm), be heated workpiece watch core temperature head≤30 ℃, heat-up rate≤10 ℃/minute.
B, initial forging temperature: 1200 ℃-1250 ℃.
C, terminal temperature: 900 ℃-950 ℃.
D, hammering strength: by light-weight-light principle.
(3) expanding hydrogen handles: in order to remove hydrogen and other content of harmful gas in the railway track welded steel, adopt the following hydrogen treatment process that expands:
T is by 2.5 minutes/mm, heat-up rate≤10 ℃/minute.(see figure 1)
(4), solution treatment: in order to obtain uniform austenite structure, improve etch resistant properties, the solution heat treatment technology of railway track welded steel is as follows:
T1 was by 0.25 minute/mm, and T2 was by 0.3 minute/mm.
Heat-up rate≤14 ℃/minute, water temperature≤80 ℃.(see figure 2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102381591A CN101748344B (en) | 2008-12-09 | 2008-12-09 | Railway track welded steel and manufacturing technology thereof |
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|---|---|---|---|
| CN2008102381591A CN101748344B (en) | 2008-12-09 | 2008-12-09 | Railway track welded steel and manufacturing technology thereof |
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| CN101748344A true CN101748344A (en) | 2010-06-23 |
| CN101748344B CN101748344B (en) | 2011-11-23 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994769A (en) * | 2012-12-19 | 2013-03-27 | 洛阳双瑞特种装备有限公司 | Remelting process of Ni-Cr-Mo anti-corrosion alloy stripping electroslag containing Ti |
| CN103014259A (en) * | 2012-12-29 | 2013-04-03 | 大冶特殊钢股份有限公司 | After-forging hydrogen diffusion and annealing method of forging material |
| CN104745960A (en) * | 2013-12-31 | 2015-07-01 | 天津冶金集团天材科技发展有限公司 | 21-10Mn7Mo steel ingot and smelting process thereof |
| CN104745963A (en) * | 2013-12-31 | 2015-07-01 | 天津冶金集团天材科技发展有限公司 | 21-10Mn7Mo steel ingot |
| CN104745962A (en) * | 2013-12-31 | 2015-07-01 | 天津冶金集团天材科技发展有限公司 | Smelting method of 21-10Mn7Mo steel ingot |
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| JPS63293143A (en) * | 1987-05-25 | 1988-11-30 | Nippon Kinzoku Kogyo Kk | Martensitic stainless steel hardening by subzero treatment |
| WO1996023083A1 (en) * | 1995-01-26 | 1996-08-01 | Nippon Steel Corporation | Weldable high-tensile steel excellent in low-temperature toughness |
| IT1294228B1 (en) * | 1997-08-01 | 1999-03-24 | Acciai Speciali Terni Spa | PROCEDURE FOR THE PRODUCTION OF AUSTENITIC STAINLESS STEEL BELTS, AUSTENITIC STAINLESS STEEL BELTS SO |
| JP2000226643A (en) * | 1998-11-30 | 2000-08-15 | Sumitomo Metal Ind Ltd | Low carbon martensitic stainless steel sheet, its production and welded steel pipe |
| FR2789090B1 (en) * | 1999-02-02 | 2001-03-02 | Creusot Loire | AMAGNETIC STAINLESS STEEL FOR USE AT VERY LOW TEMPERATURE AND NEUTRON RESISTANT AND USE |
| JP4506958B2 (en) * | 2004-08-02 | 2010-07-21 | 住友金属工業株式会社 | Welded joint and its welding material |
| JP5098217B2 (en) * | 2005-09-28 | 2012-12-12 | 新日鐵住金株式会社 | Welded joints of galvanized steel sheets excellent in corrosion resistance and zinc embrittlement cracking resistance of welds and methods for producing the same |
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| CN117340173B (en) * | 2023-12-06 | 2024-03-08 | 成都先进金属材料产业技术研究院股份有限公司 | Method for inhibiting cracking in nickel-copper alloy forging process |
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