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ADI Castings Wear Resistant Cast Iron Isothermal Quenching Process

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ADI Castings Wear Resistant Cast Iron Isothermal Quenching Process

China ADI Castings Wear Resistant Cast Iron Isothermal Quenching Process supplier
ADI Castings Wear Resistant Cast Iron Isothermal Quenching Process supplier ADI Castings Wear Resistant Cast Iron Isothermal Quenching Process supplier

Large Image :  ADI Castings Wear Resistant Cast Iron Isothermal Quenching Process

Product Details:

Place of Origin: China
Brand Name: Non- Standard
Certification: ISO9001; TS16949
Model Number: Customized

Payment & Shipping Terms:

Minimum Order Quantity: 1 Ton
Price: quote according to different drawing technique requirements
Packaging Details: Plywood crate + VCI Anti-Rust Bag
Delivery Time: within 60 days
Payment Terms: T/T, L/C
Supply Ability: 300 Tons every month
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Detailed Product Description
Material: ASTM A897/897M Grade 1050/750/07 Process: Green Sand Casting Process
Machining: CNC Machining Surface: Anti-Rust Oil
Packing: Plywood Crate + VCI Anti-Rust Bag Heat Treatment: Isothermal Quenching Process
Moulding: By Moulding Machine

Product Description and Process

ADI Austempered Ductile Iron Castings ASTM A897 Grade 1050/750/07 Foundry

 

Production process: green sand molding

Machining process: CNC machining, drill, mill, etc.

Heat treatment process: isothermal quenching process

Surface treatment process: paint coating

 

Product Material and Uses

Normally produce with ASTM A897/897M Grade 900/650/09, Grade 1050/750/07, Grade 1200/850/04,Grade 1400/1100/02,Grade 1600/1300/01, etc.

 

The austempered ductile iron casting products are widely used for auto-car components, trailer suspension system, truck parts, crankshafts, railcar wheels, cylinder lock cases, tow hooks, cylinder liner, agricultural machinery components, etc.

 

What is Austempered Ductile Iron (ADI)?

Austempered ductile iron castings, or more commonly ADI castings, is a ductile iron casting which is processed by a special heat treatment. The austempering process, with ductile iron’s superior castability, results in a material which can be used to cast complex shapes, with a greater consistency of quality, and often at less cost. The heat treatment requires an interrupted quench, usually into a salt bath, to cool the cast part at a planned rate and long enough to achieve the desired austempered result. The resulting material has a combination of exceptional strength and toughness, meeting and often exceeding those of alloy steels.

 

What are some Benefits of Austempered Ductile Iron Castings?

Up to 40% less cost than hardened steel forgings.

Lower operating noise levels.

10% less weight than steel.

Better wear than case hardened steel.

Excellent resistance to crack propagation.

Good impact strength to -120ºF.

Work hardening.

 

What Can Austempered Ductile Iron Castings (ADI) be Used for? – Application Data

Austempered ductile iron (ADI) is often used where high strength is needed and where excellent wear resistance and fatigue strength are required. Applications like for gears ADI has been used with great success. This tough work-hardening material has proved to be an excellent replacement for hardened steels. The use of austempered ductile iron can result in less weight, reduced number of components, and quieter running. Due to the lower modulus of ADI better face to face contact can be achieved which reduces Hertzien or contact stress on the teeth surfaces. Also austempered ductile iron will work harden which adds to the contact fatigue strength. As a result, gear face widths and diameters can be reduced which will make the gear run better axially and reduces weight, and at the same time provide better protection under overload conditions. The superior tribological properties of ADI have resulted in the elimination of bronze bearing bushings, and will allow the gears to run temporarily without lubrication. Due to the type of matrix structure, the softer grades of ADI can be shot-peened to double the root fatigue strength.

Another common application of austempered ductile iron castings has been crankshafts and axles. The majority of sealed-for-life refrigeration units are made with austempered crankshafts. Axle applications benefit from the materials lack of notch sensitivity, good fatigue strength, and reasonable machinability.

The railroad industry has an immense application both in retarders and rolling stock. Austempered ductile iron is very popular for retarder brake shoes, where its superior quietness and wear resistance is well received in urban semi residential communities. ADI brake beams have also been shown to outlast steel beams, and withstand the cold weather, at more than 20% less cost.

For low speed rolling stock austempered ductile iron wheels have been very successful in Europe. It has been shown that ADI railroad wheels can take larger loads than quenched and tempered steel wheels of the same hardness. ADI will also wear better when sliding between the rail and wheel exceeds more than 10%. One caveat to ADI is that it should not be used in applications where the temperature exceeds 300ºC. (570ºF) for consistently long periods. Thus high speed train wheels are not an appropriate application, nor are wheels which are braked by peripheral blocks. will allow the gears to run temporarily without lubrication. Due to the type of matrix structure, the softer grades of ADI can be shot-peened to double the root fatigue strength.

The military is becoming a major user of austempered ductile iron for shells and projectiles. Also steel forged track shoes are being replaced with ADI It is estimated that over 50,000 tons are presently produced for these military applications, and that this will grow to over 100,000 tons within the next five years. Track shoes in ADI have also been very successful both in construction, and earth moving equipment.

 

Standard ADI Grades (USA) ASTM 897-90 (ASTM 897M-90)

Grade Tensile Strength (min) Yield Strength (min) Elongation% Impact Energy * Typical Hardness
BHN
Ksi Nmm2 Ksi Nmm2 Ft-lbs Joules
1 125 850 80 550 10 75 100 269-321
2 150 1050 100 700 7 60 80 302-363
3 175 1200 125 850 4 45 60 341-444
4 200 1400 155 1100 1 25 35 388-477
5 230 1600 185 1300 - - - 444-555
* Un-notched charpy bars tested @ 22'C (+/-4'C)
Refer to relevant Standard for full details

 

 

ADI Castings Wear Resistant Cast Iron Isothermal Quenching Process

ADI Castings Wear Resistant Cast Iron Isothermal Quenching Process

 

Contact Details
Zhengzhou Yu-Long Machinery Equipment Co., Ltd.

Contact Person: James Wang

Tel: +8613213152686

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