Powder metallurgy products Ⅰ


According to 2010 data about the US production of powder metallurgy parts used in automobiles has reached 300 kinds 750.We will show you the United States and other advanced powder metallurgy company colleague’s development present situation. The following is the M P I F award-winning works; The federation since 1995, held once a year of powder metallurgy design competition, competition awards and honorable mention two awards.

1

Powder metallurgy steel manifold with solenoid assembly to 1-6 heavy-duty trucks diesel engine valve train, when the exhaust cycle, helping start “Ja ke brake” system of the engine cylinder head, reducing power and braking, so that the vehicle is decelerated. Powder metallurgy steel manifold density should not less than 6.7g / c m3, the yield strength is not less than 345MPa,ultimate tensile strength of 413MPa. Design features of complex shapes that the cylinder radius and thickness variation. Follow-up need machine hole of electromagnetic coil and two port holes.

Replace casting process with powder metallurgy process, can save the cost of more than 20%.

2

These three high precision powder metallurgy steel parts,slider, housing and the rotor, for a new, larger hybrid SUV car oil pump. Select powder metallurgy can be improved pump efficiency, reduce energy consumption and reduce vibration. Once when required, variable displacement vane pump for oil, to eliminate unnecessary oil flow. All three parts are made final shape, in order to keep the thickness and flatness tolerances, just double disc grinding. Density housing is 6.5g / cm 3, the slider has a density of 6.6g / cm 3, the rotor has a density of 6.5g / cm3, due to the three parts of complex shape and brittle, and therefore are automatically pressed sintering → → the finishing line of production.

3

VVT stator used in 1.4 L engine.This part is made of modified F e – C u powder metallurgical materials, to the complex shape parts compacting density of 7.0 g/C m3.VVT stator is characterized by complex shapes with five central hole, the pulley and the VVT housing implement an integrated design. Narrow tolerance helps to minimize any oil leakage between the adjacent compression chamber.

PM stator help reduce fuel consumption and exhaust gas formation, as well as improved operating performance of the engine, especially under low-speed torque

4

Powder metallurgy aluminum camshaft bearing cap is more than one final mesa-shaped parts, a tensile strength of 117M P a, a hardness of 85 ~ 90H RH. When installed, only one process. The other manufacturing processes, before the unit requires additional steps. Thus  the parts produced by powder metallurgy process, is estimated to reduce costs by 50%.

5

This powder metallurgy parts for high-performance DOHC V6 VVT engine device. It is manufactured with temperature and pressure, density of 7.25g / c m3.The temperature difference between the mold and the powder to be controlled within 2.8 ℃.Use powder heaters equipped with Groove CNC machinery – Hydraulic composite molding press, the details of the inverse sprocket from 7.7mm pressed to near net shape forming. This part of the complex shape design to make it into a multifunctional parts, both high strength timing chain wheel, and can implement CAM phase function. Tooth for heat treatment, and tempering to apparent hardness 70 h R A. Such parts are generally tensile strength 1169M P a, fatigue limit is 358M P a, compressive yield strength of 1262MPa.

6

This new fracture split camshaft cover for a variety of styles of trucks and light trucks in the diesel engine (with 2.8L, 3.0L and 4.2L diesel engine).3.0L diesel engine has five caps, each of the total diesel use of powder metallurgy 1.75kg. Because it is the first time the use of low-density powder metallurgy parts fracture split process, therefore, metallurgy design in addition to reducing the time and cost cutting nearly 60%, but also saves the cast iron cover the required costs locator sleeve. This cover has a density of powder metallurgy 6.8g / c m3. Mechanical properties: yield strength 433M P a, tensile strength 560M P a, fatigue strength 175M P a, hardness of not less than 80H RB. Subsequent processing there is drilling, broaching, boring, tapping, cutting and fracture split.

7

This part (Camshaft sprocket) is made by the  component of  iron – C – Mo – Cr materials,  its density is 7.0 g/c m3, a tensile strength of 820M P a, a yield strength of 682M P a, transverse rupture strength of 1419M P a, the impact energy of 15J. This is the first time the chrome base sinter hardening materials used for the camshaft drive. The sprocket is improved with three punches and two on the lower punch press forming die. Parts for the 4.0L V6 engine. Using the powder metallurgy sprocket cost savings of more than 10%.

8

This part  is discharged from the exhaust gas oxygen sensor (HEGO) projecting pedestal, made of 409L and 434L stainless steel powder.The oxygen sensor is positioned in the automotive engine exhaust manifold assembly, catalytic converter and exhaust pipe. Molding density of not less than 7.2g / c m3, can be made into various shapes, such as straight walls, stepped, angled, angled saddle-shaped design and projection welding. Powder metallurgy sensor convex pedestal can satisfy the weldability, heat resistance, fatigue strength, oxidation resistance and corrosion resistance requirements, but also can increase as trenches, vaults and taper design features like the exhaust flange. In addition to meet the performance requirements, but also cost savings of 30% to 70%.

9

This is one for the exhaust VVT sprocket mechanism, which is forming a density of 6.9g / c m3. The tensile strength of the sprocket 462M Pa, a yield strength of 345M P a, the lowest hardness 130H RB. This kind of high precision parts is made of powder metallurgy diffusion of alloying steel production, can save cost 20% ~ 30%.

 

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