|Machinery Repair Shops, Energy & Mining
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|350mm,300mm,450mm, 650mm As Per Customer Specific
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|As Per Customer's Drawing
Train Car Wheels ODM,
ISO9001 2008 Train Car Wheels,
OEM Train Car Wheels
ISO9001 2008 Train Car Wheels ODM OEM For Electric Locomotive Rollings
At present, the view that the white layer is regarded as a martensite structure has been unanimously recognized, and the main controversy lies in the fine structure of the white layer. One view is that the white layer is the result of a phase transformation and consists of fine-grained martensite with fine grains formed by rapid heating and sudden cooling of the material during cutting. Another view is that the formation of white layer is only a term of deformation mechanism, and it is only unconventional martensite obtained by plastic deformation.
What are the factors affecting the heat treatment of forgings? The heat treatment process of forgings, the heat treatment process of forgings improves the plasticity, impact toughness, fatigue strength and durability of the forgings, and then the final heat treatment of the parts can be obtained. Good comprehensive properties such as hardness, strength and plasticity.
The larger the radius of the obtuse angle of the tool, the larger the residual compressive stress value; the higher the workpiece hardness, the larger the residual compressive stress value. The hardness of the workpiece has a great influence on the surface integrity of the workpiece. The greater the hardness of the workpiece, the more conducive to the formation of residual compressive stress.
Another important factor affecting the surface quality of hard cutting is the formation of white layer. The white layer is a microstructure formed with the hard cutting process. It has unique wear characteristics: on the one hand, it has high hardness and good corrosion resistance; Even formed workpieces are cracked after placing a stage after machining. When the hardened AISIE52100 bearing steel was cut with ceramic and PCBN tools on a high-rigidity CNC lathe, it was found that the microstructure of the workpiece surface and sub-surface changed, and the microstructure was composed of a white untempered layer and a black over-tempered layer.
Wheelsets, as well as called wheel pairs are key safety-relevant components of rail vehicle bogies.Their properties thus have an influence on such important aspects as life cycle costs and sound emissions. A wheelset is the wheel-axle assembly of a railroad car.The frame assembly beneath each end of a car,railcar or locomotive that holds the wheelsets is called the bogie.
ISO9001 2008 Train Car Wheels ODM OEM For Electric Locomotive Rollings
|Wheel profile diameters(mm)
|Main motor power(kw)
|Main axis feeds(mm/min)
Features of ISO9001 2008 Train Car Wheels ODM OEM For Electric Locomotive Rollings
Most train wheels have a conical taper of about 1 in 20 to enable the wheelset to follow curves with less chance of the wheel flanges coming in contact with the rail sides, and to reduce curve resistance. Correspondingly, the rails generally slant inwards at the same angle as the wheel cone.Shaft assembly Without the conical shape, a wheel would tend to continue in a straight path due to the inertia of the rail vehicle, reduction box causing the wheelset to move towards the outer rail on the curve. The cone increases the effective diameter of the wheel as it moves towards the outer rail, and since the wheels are mounted rigidly on the axle, the outer wheels push cart travel slightly farther, causing the wheelsets to more efficiently follow the curve without sideways displacement. Abnormal wear at the wheel–rail interface is thus avoided.A loud, piercing, very high-pitched squeal usually results – especially evident on curves in tunnels, stations and elevated track.
Package of ISO9001 2008 Train Car Wheels ODM OEM For Electric Locomotive Rollings
Wheel set China factory direct manufacturing of ISO9001 2008 Train Car Wheels ODM OEM For Electric Locomotive Rollings :
1. Freight wagons
2. Passenger wagons
5. Diesel-Electric Trains
6. Narrow gauge trains
7. Special vehicles for rail maintenance.
Application of ISO9001 2008 Train Car Wheels ODM OEM For Electric Locomotive Rollings:
1. Freight wagon wheel set
2. Passenger Coach Wheel Set
3. Locomotive Wheel Set
4. All wheel sets could be supplied with bearing and axle box or without bearing.
About the customized forged wheelsets for all kinds of uses, our company King Rail is the professional manufacturer of the crane wheel, forged wheel, cast iron wheel, polyurethane wheel, train wheel, steel crane wheel set which with more than 15 years designing and producing experience. With our own forging workshop, machining workshop, heat treatment workshop, we can provide all kind of wheels with different materials, such as ZG430640 cast steel, 60#,65 # , 65Mn, 42CrMoA or according to your demands.
Our Equipments of railway wheel set:
The total production area of Kingrail Parts is 55, 000 square meters, including a 40, 000 square meter factory and 10, 000 square meter warehouse. The production mill covers over 100, 000 square meters equipped with steel rolling and casting lines, rail elastic clip lines, fish plate lines, spike & Bolt lines, heating treatment line and surface anticorrosion treatment line as well as electro galvanizing, hot galvanizing and Dacromet processing lines,hydraulic wheel press machine to hydraulic wheel press,wheel press machine,mounting press machine,. Our technical force is strong, the inspection method is complete, we can strictly implement the national railway standards for production.
Services we can provide:
1. Our railway products comply with AREMA, DIN, BS, UIC, GOST, NF, JIS, GB and other standards.
2. We can customize railway fasteners products according to your samples or drawings.
3. Fast , Convinient Services with High quality products but competitive price.
4. Complete quality inspection procedure to every batch of shipment before delivery.
5. After-service can be warranty last to 3 years of any questions from our customers.
Our aim is to serve customers by providing the the most optimized solution according to the needs of production and meet the satisfaction.
If the forging process used is unreasonable, forging defects may occur, including surface defects, internal defects or unqualified performance, etc., which will affect the processing quality of subsequent processes, and some will seriously affect the performance of forgings and reduce the finished product. service life and even endanger safety. The influence of forging structure on the structure and properties after final heat treatment is mainly manifested in the following aspects.
①Irretrievable structural defects: austenitic and ferritic heat-resistant stainless steels, high-temperature alloys, aluminum alloys, magnesium alloys, etc. have no allotropic transformation during heating and cooling, as well as some copper alloys and titanium alloys etc., the structural defects generated in the forging process cannot be improved by heat treatment.
②Structural defects that can be improved: coarse grains and Widmancer structures in general overheated structural steel forgings, slight network carbides caused by improper cooling of hypereutectoid steel and bearing steel, etc. When the forgings are heat treated after forging Satisfactory structure and properties can still be obtained after final heat treatment.
③ The structural defects that are difficult to be eliminated by normal heat treatment: such as low magnification coarse grains, 9Cr18 stainless steel, H13 twin carbides, etc., can be improved by measures such as high temperature normalizing, repeated normalizing, low temperature decomposition, and high temperature diffusion annealing.
④ Microstructure defects that cannot be eliminated by the general heat treatment process: severe stone fractures and facet fractures, over-burning, ferrite strips in stainless steel, carbide meshes and strips in ledeburite tool steel, etc. The performance of the forgings is degraded or even unqualified.
⑤ Microstructure defects that will further develop during final heat treatment: For example, the coarse-grained structure in alloy structural steel forgings, if not improved during post-forging heat treatment, often causes coarse martensitic needles after carbon, nitriding and quenching and unqualified performance; coarse banded carbides in high-speed steel often cause cracking during quenching.
⑥ If the heating is improper, for example, the heating temperature is too high and the heating time is too long, it will cause defects such as decarburization, overheating, and overburning.
⑦ During the cooling process after forging, if the process is improper, it may cause cooling cracks, white spots, etc., which will crack during the heat treatment process.
What are the effects of machining on the quality of heat-treated workpieces?
(1) Under the condition of quenching and tempering, annealing and normalizing of the workpiece, the hardness is lower than 45HRC, and the quality of the workpiece including surface finish, residual stress, machining allowance, surface decarburization and carbon-lean layer must be removed, etc., all of which have no effect. Obviously, it will not cause a change in the underlying performance of the workpiece.
(2) Processing of hardened steel or workpiece, also known as hard machining, the hardness of workpiece is as high as 50~65HRC, and the materials mainly include ordinary hardened steel, hardened die steel, bearing steel, rolled steel and high-speed steel, etc. The influence of cutting is more obvious. During the cutting process, the generation and conduction of cutting heat, high-speed friction and wear and other factors will cause a certain degree of damage to the machined surface. The integrity of the machined surface in hard cutting mainly includes the surface structure, hardness, surface roughness, dimensional accuracy, distribution of residual stress and the generation of white layer.
The hardness of the machined surface increases with the increase of the cutting speed, and decreases with the increase of the cutting amount by the feed rate. And the higher the hardness of the machined surface, the greater the depth of the hardened layer. The results show that the residual compressive stress of the workpiece surface is uniform after hard cutting, while the maximum compressive stress of the workpiece after grinding is mainly concentrated on the workpiece surface.
Quality control processes for wheel sets:
1. Dynamic balancing- Automatic Stand
2. Electrical resistance testing
3. Ultrasonic test of the pressing
4.Geometrical control-new, unique underground, fully-automatic stand with 4D laser measurement head which gives volume detailed measurement of the wheel sets
5.Thickness control of painting.
Railway parts products we can provide:
1, Rail Spike Series: Rail Screw Spike, rail Dog Spike, rail Elastic Spike etc.
2, Track Bolt series: Track Bolt, Segment Bolt, Metro Bolt, Tunnel Bolt, Hex Bolt, Square Bolt, Turnout Bolt, Fishtail Bolt, T bolt etc
3, Rail Clip series: Nabla rail Clip, Elastic rail Clip, SKL rail Tension Clamp, O rail Clip, Gauge Lock Clip etc
4, Steel Rails series: Railway rails, Crane Rails, Mining Rails, Over the head Rails, etc
5, Steel rail wheels series: Train Wheels, Crane Wheels, Hi-rail vehicle wheels, etc
6, Other materials and accessories: Rail Gauge Insulator, rail rubber Pad, rail Fish plate, Nut, rail Plastic Dowel, rail Tie plate, Spring Washer, Flat Washer, Cast Iron Insert, Anti Creeper, rail Gauge Rod etc.
Why choose us:
1. The company is in a leading position in the industry and has obtained SGS-ISO9001: 2008 quality system certification and CRCC certification. Quality is guaranteed.
2. We have 8 professional sales staff and more than 60 professional engineers. Can provide professional and fast suggestions and quotations for your railway customized products
3. Ma′anshan is a port city. We can provide you with faster shipping services
4.20 years of production and sales experience. Deal with all kinds of after-sales problems for you in time.
Contact Person: maggie