CN106086679A - A kind of bullet train Forging Steel Brake Disc Steel material and the Forging Technology of forging thereof - Google Patents
A kind of bullet train Forging Steel Brake Disc Steel material and the Forging Technology of forging thereof Download PDFInfo
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- CN106086679A CN106086679A CN201610658175.0A CN201610658175A CN106086679A CN 106086679 A CN106086679 A CN 106086679A CN 201610658175 A CN201610658175 A CN 201610658175A CN 106086679 A CN106086679 A CN 106086679A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/125—Discs; Drums for disc brakes characterised by the material used for the disc body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of bullet train Forging Steel Brake Disc Steel material and the Forging Technology of forging thereof, comprise the following steps: carry out batching weighing by mass percentage, high-quality molten steel is smelted at middle frequency furnace, carry out liquid forging the most on a hydraulic press, and about the 1150 DEG C demouldings, blank is forged by the duplex forging mode using open die forging to add constraint forging, obtains secondary forging stock；Then twice cycle alternation mode of water-cooled air cooling is used to carry out quenching heat treatment secondary forging stock；Finally, the double tempering using tempering water-cooled to be tempered again water-cooled again the secondary forging base after quenching processes, and i.e. obtains described bullet train Forging Steel Brake Disc steel forgings.The Forging Technology of the present invention and the combination of Technology for Heating Processing effectively prevent complex-shaped forging hardening break, and the comprehensive mechanical property especially low-temperature flexibility of the bullet train Forging Steel Brake Disc steel forgings manufactured increases substantially, and can be perfectly suitable for Immobilization.
Description
Technical field
The present invention relates to the friction material field of high-speed train braking, be specifically related to a kind of Forging Steel Brake Disc Steel material
And the Forging Technology of forging.
Background technology
Along with the raising of bullet train speed, promptness, the safety and stability of train braking is proposed higher
Requirement, this also means that and train braking device and the quality of brake material and performance need are met higher requirement.At present, use
The material making brake disc of high-speed train is mainly steel system metal material, including cast steel and forged steel two kinds.Due to domestic casting level
Restriction, the casting production quality as brake disc of high-speed train is unstable, easily occurs that quality problems affect making of brake disc
With effect and life-span.And the processing technology of forged steel relative maturity, the brake disc of forged steel material have good braking effect and
The preferably life-span.Additionally, the country that foreign technology is leading, same what traditional steel system brake material was optimized and improved
Time, the most constantly develop new brake material, such as aluminum matrix composite and carbon fibre-reinforced graphite composite etc..
At present, High Speed Train in China brake material and international most advanced level difference are very big, and present stage brake disc the most also depends on
Rely in import.In recent years, domestic a large amount of scientific workers carry out correlational study to new brake material, but owing to technological reserve is thin
Weak, developmental research is also and immature, it is difficult to realize industrialization.Meanwhile, forged steel, compared with other disc material, has work
Simple, the with low cost and of good performance advantage of skill, is widely used in High Speed Train in China brakes.
The immediate cause that brake disc lost efficacy is to produce violent high temperature friction and substantial amounts of heat during high-speed train braking
Transmission.Therefore, friction braking material not only should have sufficiently high mechanical strength, good heat dissipation characteristics, high thermal conductance
With the little coefficient of expansion, additionally needing brake disc to have stable frictional behaviour, friction factor is affected by environment little, low
Wear rate and high wearability, good hot-cracking resistance.
In braking procedure, the frictional behaviour of brake disc also can be produced the heaviest by the formation of the friction surface film of brake disc
The impact wanted.The formation of friction surface film and the brake material abrasion mechanism in braking procedure is closely connected.At the beginning of braking
Phase, abrasion mechanism, mainly based on abrasive wear, is auxiliary with oxidative wear and adhesive wear；In the braking later stage, work as friction surface
After film is formed, abrasion mechanism is again based on Delamination wear, and along with oxidative wear and adhesive wear.Therefore, select suitably
Disc material is most important, if material selection is improper, highly train can lose efficacy because of a variety of causes when braking, thus produces
Raw danger.
For Forging Steel Brake Disc relatively other metal friction brake materials, there is higher intensity (>=800MPa) and good
Toughness, additionally, forged steel also has higher heat resistanceheat resistant cracking, good wearability and heat-resistant anti-fatigue, its elevated temperature strength, frictional property
Energy and fatigue durability are the most excellent, and therefore its service life is longer.Japan on the rapid of the Shinkansen the most widely used
Ni-Cr-Mo low-alloy Forging Steel Brake Disc, it is possible to meet the train braking requirement that speed per hour is 260km/h.France is at TGV-A train
The brake material of upper use is Cr-Mo-V low-alloy Forging Steel Brake Disc, and its brake disc is 300km/h braking procedure at train speed per hour
In, demonstrate the good combination property of forged steel material.
The Forging Steel Brake Disc that China produces remains in a certain distance with the product of developed country.Although from the beginning of " 95 "
Domestic correlational study unit and manufacturer make great efforts to improve the braking ability of brake disc always, and make significant progress, but
The shortcomings such as its service life is short, low-temperature flexibility difference are solved the most at all.
Summary of the invention
For solving the deficiencies in the prior art, it is an object of the invention to, it is provided that a kind of energy consumption is low, steel utilization ratio is high, life
Produce low cost, the bullet train Forging Steel Brake Disc Steel material of good combination property and the Forging Technology of forging thereof, forge out
Material can reach the requirements index of high-speed train braking.
The technical scheme is that a kind of bullet train Forging Steel Brake Disc Steel material, in units of mass percent,
Its raw material and proportioning are as follows:
Carbon 0.22～0.43%；
Silicon 0.20～0.87%；
Manganese 0.51～1.08%；
Sulfur 0.001～0.035%；
Phosphorus 0.001～0.035%；
Chromium 0.80～2.04%；
Nickel 0.80～2.05%；
Vanadium 0.10 ~ 1.0%；
Molybdenum 0.10～0.35%；
Gadolinium 1.0～2.50%；
Cerium 0.20～0.40%；
Iron surplus, the quality summation of above-mentioned each component is 100%.
The two of the purpose of the present invention are to provide the Forging Technology of a kind of above-mentioned bullet train Forging Steel Brake Disc steel forgings, bag
Include following steps:
Use above-mentioned raw materials, middle frequency furnace is smelted into high-quality molten steel, carry out liquid forging the most on a hydraulic press, and
1150 DEG C carry out the demoulding, use open die forging+constraint forging finish forging immediately, specifically comprise the following steps that after the demoulding
(1) dispensing: batching weighing according to the above ratio；
(2) smelt: use middle frequency furnace that raw material is smelted into high-quality molten steel；
(3) liquid forging: be incubated in the molten steel smelted is poured into the air pressure casting holding furnace of full nitrogen；Again will insulation
In stove, molten steel casting carries out liquid forging in liquid forging machine mould, to carry out being preheated to 250 ~ 350 DEG C by mould before casting,
The demoulding immediately when blank temperature is at 1150 DEG C；
(4) finish forging: the high temperature blank after the demoulding is carried out immediately open die forging jumping-up-pulling-secondary jumping-up-secondary pulling,
Once forged base；The most again by open die forging jumping-up-pulling under radial direction restraint conditions-secondary jumping-up-secondary pulling, obtain
Secondary forging base；
(5) property heat treatment: utilize the forging stock temperature after constraint forging to carry out water-cooled-twice quenching of air cooling alternate cycles, then
It is tempered-water-cooled again, obtains bullet train Forging Steel Brake Disc steel forgings.
Further, in above-mentioned steps (2), after smelting molten steel, Argon purification is carried out.
Further, in above-mentioned steps (3), described liquid forging machine mould uses internal layer to be the compound die of high temperature alloy
Tool, is cooled with circulating water mould in casting cycle, by regulation cooling water flow, pressure make mold temperature control 450 DEG C with
In.
Further, in above-mentioned steps (4), being forged for the first time by open die forging and once forged base, forging is begun to forge temperature
Degree is 1150 DEG C, and final forging temperature is 950 DEG C, and forging ratio is more than 3.5:1.
Further, in above-mentioned steps (4), open die forging radially constraint is forged again, obtain secondary forging base, forging
Making initial forging temperature is 1150 DEG C, and final forging temperature is 950 DEG C, and forging ratio is more than 3:1.
Further, in above-mentioned steps (5), water-cooled-twice quenching of air cooling alternate cycles, during water-cooled, water is stirred place
Reason, wherein, the stirring flow velocity of water is not less than 0. 8m/s.
Further, in above-mentioned steps (5), the secondary forging base after quenching is used at 600 DEG C, insulation 5h tempering-water
Be cooled to room temperature-550 DEG C again, insulation 5h tempering-again water-cooled to room temperature double tempering process.
The bullet train Forging Steel Brake Disc Steel material of the present invention and the Forging Technology of forging thereof, select special steel iron material
Material, and Forging Technology and Technology for Heating Processing are combined, i.e. liquid forging combines the duplex forging technique of open die forging+constraint forging
In conjunction with the quenching-and-tempering process of water-cooled-air cooling twice time cycle alternation martemper, not only effectively prevent complex-shaped
Heavy forging hardening break, and the corrosion resistance of the bullet train Forging Steel Brake Disc steel forgings manufactured and comprehensive mechanical property
Especially low-temperature flexibility increases substantially, and can be perfectly suitable for the high-speed train braking under varying environment.
Accompanying drawing explanation
Fig. 1 is the metallograph of steel forgings of the present invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
Determine the composition of Steel material and carry out batching weighing in proportion, such as following table 1(unit: kg):
Embodiment 1:
(1) dispensing: carry out batching weighing by table 1；
(2) smelt: use middle frequency furnace that raw material is smelted into high-quality molten steel, in smelting process, the chemical composition of molten steel is carried out
Real-time inspection, checks and qualified is high-quality molten steel；Being added by the chemical composition not enough to content of disqualified upon inspection, is contained
The modes such as the chemical composition of amount excess is diluted are adjusted, until the chemical composition of molten steel reaches requirement, become high-quality
Molten steel, after smelting molten steel, carries out Argon purification, improves Molten Steel Cleanliness；
(3) liquid forging: be incubated in the molten steel smelted is poured into the air pressure casting holding furnace of full nitrogen；Again will insulation
In stove, molten steel casting carries out liquid forging in liquid forging machine mould, to carry out being preheated to 250 DEG C by mould, work as base before casting
The demoulding immediately when 1150 DEG C of part temperature；
(4) finish forging: the high temperature blank after the demoulding is carried out immediately open die forging jumping-up-pulling-secondary jumping-up-secondary pulling,
Once being forged base, forging initial forging temperature is 1150 DEG C, and final forging temperature is 750 DEG C, and forging ratio is more than 3.5:1；The most again will
Open die forging jumping-up-pulling under radial direction restraint conditions-secondary jumping-up-secondary pulling, obtains secondary forging base, forges initial forging temperature
Being 1150 DEG C, final forging temperature is 950 DEG C, and forging ratio is more than 3:1；
(5) property heat treatment: utilize the forging stock temperature 950 DEG C after constraint forging to carry out water-cooled-twice quenching of air cooling alternate cycles,
Water cooling 3min → air cooling 30min → water cooling 5min air cooling 30min, the most again to the secondary forging after quenching
Base use 600 DEG C, insulation 5h tempering-water-cooled to room temperature-550 DEG C again, insulation 5h be tempered-water-cooled is to the double tempering of room temperature again
Process, obtain bullet train Forging Steel Brake Disc steel forgings.
Embodiment 2:
(1) dispensing: carry out batching weighing by table 1；
(2) smelt: use middle frequency furnace that raw material is smelted into high-quality molten steel, in smelting process, the chemical composition of molten steel is carried out
Real-time inspection, checks and qualified is high-quality molten steel；Being added by the chemical composition not enough to content of disqualified upon inspection, is contained
The modes such as the chemical composition of amount excess is diluted are adjusted, until the chemical composition of molten steel reaches requirement, become high-quality
Molten steel, after smelting molten steel, carries out Argon purification, improves Molten Steel Cleanliness；
(3) liquid forging: be incubated in the molten steel smelted is poured into the air pressure casting holding furnace of full nitrogen；Again will insulation
In stove, molten steel casting carries out liquid forging in liquid forging machine mould, to carry out being preheated to 300 DEG C by mould, work as base before casting
The demoulding immediately when 1150 DEG C of part temperature；
(4) finish forging: the high temperature blank after the demoulding is carried out immediately open die forging jumping-up-pulling-secondary jumping-up-secondary pulling,
Once being forged base, forging initial forging temperature is 1150 DEG C, and final forging temperature is 750 DEG C, and forging ratio is more than 3.5:1；The most again will
Open die forging jumping-up-pulling under radial direction restraint conditions-secondary jumping-up-secondary pulling, obtains secondary forging base, forges initial forging temperature
Being 1150 DEG C, final forging temperature is 950 DEG C, and forging ratio is more than 3:1；
(5) property heat treatment: utilize the forging stock temperature 950 DEG C after constraint forging to carry out water-cooled-twice quenching of air cooling alternate cycles,
Water cooling 4min → air cooling 40min → water cooling 4min air cooling 40min, the most again to the secondary forging after quenching
Base use 600 DEG C, insulation 5h tempering-water-cooled to room temperature-550 DEG C again, insulation 5h be tempered-water-cooled is to the double tempering of room temperature again
Process, obtain bullet train Forging Steel Brake Disc steel forgings.
Embodiment 3:
(1) dispensing: carry out batching weighing by table 1；
(2) smelt: use middle frequency furnace that raw material is smelted into high-quality molten steel, in smelting process, the chemical composition of molten steel is carried out
Real-time inspection, checks and qualified is high-quality molten steel；Being added by the chemical composition not enough to content of disqualified upon inspection, is contained
The modes such as the chemical composition of amount excess is diluted are adjusted, until the chemical composition of molten steel reaches requirement, become high-quality
Molten steel, after smelting molten steel, carries out Argon purification, improves Molten Steel Cleanliness；
(3) liquid forging: be incubated in the molten steel smelted is poured into the air pressure casting holding furnace of full nitrogen；Again will insulation
In stove, molten steel casting carries out liquid forging in liquid forging machine mould, to carry out being preheated to 350 DEG C by mould, work as base before casting
The demoulding immediately when 1150 DEG C of part temperature；
(4) finish forging: the high temperature blank after the demoulding is carried out immediately open die forging jumping-up-pulling-secondary jumping-up-secondary pulling,
Once being forged base, forging initial forging temperature is 1150 DEG C, and final forging temperature is 750 DEG C, and forging ratio is more than 3.5:1；The most again will
Open die forging jumping-up-pulling under radial direction restraint conditions-secondary jumping-up-secondary pulling, obtains secondary forging base, forges initial forging temperature
Being 1150 DEG C, final forging temperature is 950 DEG C, and forging ratio is more than 3:1；
(5) property heat treatment: utilize the forging stock temperature 950 DEG C after constraint forging to carry out water-cooled-twice quenching of air cooling alternate cycles,
Water cooling 5min → air cooling 20min → water cooling 5min air cooling 20min, the most again to the secondary forging after quenching
Base use 600 DEG C, insulation 5h tempering-water-cooled to room temperature-550 DEG C again, insulation 5h be tempered-water-cooled is to the double tempering of room temperature again
Process, obtain bullet train Forging Steel Brake Disc steel forgings.
Bullet train Forging Steel Brake Disc steel forgings comprehensive mechanics Data Comparison is obtained, such as following table through above-mentioned manufacture method
2:
Table 2 bullet train Forging Steel Brake Disc steel forgings comprehensive mechanics Data Comparison
As shown in Table 2, above-mentioned 3 embodiment products and international technical norms require to contrast, the product capability that the present invention obtains
Learn parameter all far above international technical norms requirement.The comprehensive mechanical property of the bullet train Forging Steel Brake Disc steel forgings manufactured
Especially low-temperature flexibility increases substantially, and can be perfectly suitable for Immobilization.
Claims (9)
1. a bullet train Forging Steel Brake Disc Steel material, it is characterised in that: by percentage to the quality, its raw material and proportioning are such as
Under:
Carbon 0.22～0.43%；
Silicon 0.20～0.87%；
Manganese 0.51～1.08%；
Sulfur 0.001～0.035%；
Phosphorus 0.001～0.035%；
Chromium 0.80～2.04%；
Nickel 0.80～2.05%；
Vanadium 0.10 ~ 1.0%；
Molybdenum 0.10～0.35%；
Gadolinium 1.0～2.50%；
Cerium 0.20～0.40%；
Iron surplus；Above-mentioned each constituent mass summation is 100%.
2. the Forging Technology of a bullet train Forging Steel Brake Disc steel forgings as claimed in claim 1, it is characterised in that use
Above-mentioned raw materials, smelts into high-quality molten steel in middle frequency furnace, carries out liquid forging the most on a hydraulic press, and carry out at 1150 DEG C
The demoulding, uses open die forging+constraint forging finish forging immediately after the demoulding.
Forging Technology the most according to claim 2, it is characterised in that specifically comprise the following steps that
(1) dispensing: batching weighing according to the above ratio；
(2) smelt: use middle frequency furnace that raw material is smelted into high-quality molten steel；
(3) liquid forging: be incubated in the molten steel smelted is poured into the air pressure casting holding furnace of full nitrogen；Again will insulation
In stove, molten steel casting carries out liquid forging in liquid forging machine mould, to carry out being preheated to 250 ~ 350 DEG C by mould before casting,
The demoulding immediately when blank temperature is at 1150 DEG C；
(4) finish forging: the high temperature blank after the demoulding is carried out immediately open die forging jumping-up-pulling-secondary jumping-up-secondary pulling,
Once forged base；The most again by open die forging jumping-up-pulling under radial direction restraint conditions-secondary jumping-up-secondary pulling, obtain
Secondary forging base；
(5) property heat treatment: utilize the forging stock temperature after constraint forging to carry out water-cooled-twice quenching of air cooling alternate cycles, then
It is tempered-water-cooled again, obtains bullet train Forging Steel Brake Disc steel forgings.
Forging Technology the most according to claim 3, it is characterised in that: in above-mentioned steps (2), after smelting molten steel, enter
Row Argon purifies.
Forging Technology the most according to claim 3, it is characterised in that: in above-mentioned steps (3), described liquid forging machine mould
Using internal layer is the composite die of high temperature alloy, is cooled with circulating water mould in casting cycle, by regulation cooling water flow, pressure
Power makes mold temperature control within 450 DEG C.
Forging Technology the most according to claim 3, it is characterised in that: in above-mentioned steps (4), open die forging is forged for the first time
Making and once forged base, forging initial forging temperature is 1150 DEG C, and final forging temperature is 750 DEG C, and forging ratio is more than 3.5:1.
Forging Technology the most according to claim 3, it is characterised in that: in above-mentioned steps (4), by open die forging radially constraint again
Secondary forging, obtain secondary forging base, forging initial forging temperature is 1150 DEG C, and final forging temperature is 950 DEG C, and forging ratio is more than 3:1.
Forging Technology the most according to claim 3, it is characterised in that: in above-mentioned steps (5), water-cooled-air cooling alternate cycles
Twice quenching, is stirred water during water-cooled, and wherein, the stirring flow velocity of water is not less than 0. 8 m/s.
Forging Technology the most according to claim 3, it is characterised in that: in above-mentioned steps (5), to the secondary forging after quenching
Base use 600 DEG C, insulation 5h tempering-water-cooled to room temperature-550 DEG C again, insulation 5h be tempered-water-cooled is to the double tempering of room temperature again
Process.
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| CN201610658175.0A CN106086679B (en) | 2016-08-12 | 2016-08-12 | Steel material for high-speed train forged steel brake disc and forging process of forging of steel material |
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| CN201610658175.0A CN106086679B (en) | 2016-08-12 | 2016-08-12 | Steel material for high-speed train forged steel brake disc and forging process of forging of steel material |
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Cited By (5)
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| CN106399863A (en) * | 2016-12-03 | 2017-02-15 | 东北大学 | 24CrNiMoRe alloy steel powder of laser additives and production method thereof |
| CN106521344A (en) * | 2016-12-14 | 2017-03-22 | 苏州富艾姆工业设备有限公司 | Machining process of wear resisting piston rod for valve |
| CN107470583A (en) * | 2017-08-15 | 2017-12-15 | 北京交通大学 | The semi-solid rheological squeeze casting mould and casting method of high ferro brake disc |
| CN111118423A (en) * | 2019-11-27 | 2020-05-08 | 北京钢研高纳科技股份有限公司 | GH4282 nickel-based high-temperature alloy bar and preparation method thereof |
| CN112159937A (en) * | 2020-09-28 | 2021-01-01 | 南京工程学院 | High-stability friction-resistant train brake disc and preparation method thereof |
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| CN106399863A (en) * | 2016-12-03 | 2017-02-15 | 东北大学 | 24CrNiMoRe alloy steel powder of laser additives and production method thereof |
| CN106521344A (en) * | 2016-12-14 | 2017-03-22 | 苏州富艾姆工业设备有限公司 | Machining process of wear resisting piston rod for valve |
| CN107470583A (en) * | 2017-08-15 | 2017-12-15 | 北京交通大学 | The semi-solid rheological squeeze casting mould and casting method of high ferro brake disc |
| CN107470583B (en) * | 2017-08-15 | 2019-06-04 | 北京交通大学 | The semi-solid rheological squeeze casting mould and casting method of high-speed rail brake disc |
| CN111118423A (en) * | 2019-11-27 | 2020-05-08 | 北京钢研高纳科技股份有限公司 | GH4282 nickel-based high-temperature alloy bar and preparation method thereof |
| CN112159937A (en) * | 2020-09-28 | 2021-01-01 | 南京工程学院 | High-stability friction-resistant train brake disc and preparation method thereof |
| CN112159937B (en) * | 2020-09-28 | 2021-03-30 | 南京工程学院 | High-stability friction-resistant train brake disc and preparation method thereof |
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