Heavy Tungsten Alloy Crankshafts means that its specific gravity is higher than other materials. High specific gravity tungsten alloy is the best material choice in machinery, ships, aircraft, etc. where counterweight is required but the volume is relatively small! Therefore, tungsten alloy crankshafts are widely used in some high-performance engines, such as racing cars, rowing boats, ships, automobiles, etc.
Chemical Composition | 90%W | 93%W | 95%W | 97%W | ||||||
State | Sinter | Vacuum | Forge | Sinter | Vacuum | Forge | Sinter | Vacuum | Sinter | Vacuum |
Density (g/cc) | 16.85-17.25 | 17.15-17.85 | 17.75-18.35 | 18.25- 18.85 | ||||||
Hardness (HRC) | 32 Max | 30 Max | 40 Min | 33 Max | 31 Max | 40 Min | 34 Max | 32 Max | 35 Max | 33 Max |
Tensile Strength (Max) | 770 Min | 900 Min | 1400 Max | 770 Min | 910 Min | 1440 Max | 735 Min | 920 Min | 700 Min | 850 Min |
Yield Strength (Mpa) | 620 Min | 620 Min | 1280 Max | 650 Min | 650 Min | 1340 Max | 650 Min | 650 Min | - | - |
Elongation (%) | 5 Min | 15 Min | 5 Min | 5 Min | 12 Min | 3 Min | 3 Min | 12 Min | 2 Min | 6 Min |
Heavy Tungsten Alloy Crankshafts Picture:
The crankshaft is an important part for the engine to withstand shock loads and transmit power. Among the five major components of the engine, the crankshaft is the most difficult to ensure the machining quality. Due to the poor working conditions of the crankshaft, the crankshaft material and blank processing technology, accuracy, surface roughness, heat treatment, surface reinforcement, dynamic balance, etc. are required. are very strict. If the quality of any link cannot be guaranteed, it will seriously affect the service life of the crankshaft and the reliability of the entire machine.
Traditional crankshafts are usually made of medium carbon steel or medium carbon alloy steel by die forging. After high frequency quenching or nitriding treatment, the surface hardness and roughness of the journal surface are higher after fine grinding. However, the traditional crankshaft materials can no longer meet the requirements of the rapid development of crankshaft production and use.