Powder Metallurgy Parts

Product Introduction

Properties of Powder Metallurgical Parts
1.Good uniformity of ingredients

2.Superior strength and hardness

3.Diverse shapes and sizes

4.Complex structure and strong customization

 

 

Commodity	Factory customized high precision powder metallurgy parts
General Material	Iron powder ,Stainless Steel powder ,Cooper powder
Surface	High frenquency quenching ,oil impregnation ,tumbling ,plating ,steam treating etc.
Application	Medical apparatus and instruments Hardware field Automobile industry Home appliances
Packaging Details	nner Packing: Anti-rust Paper/Film; Plastic Bag. Outer Packing: Carton/Nylon Belt Freight Packing: Wooden Case/Steel Belt; Pallet

 

 

 

1) Powder metallurgy can ensure the accuracy and uniformity of the material composition ratio.

2) Suitable for producing products of the same shape and large quantities, low production cost.

3) The production process is not afraid of oxidation, and no material pollution will occur.

4) No subsequent machining processing is required, saving materials and reducing costs.

5) Most difficult metals and compounds, pseudo alloys, porous materials can only be manufactured by powder metallurgy

 

 

 

 

 

The Relationship between Materials and Properties of Powder Metallurgy Parts

 

1.The Influence of Material Characteristics on Component Performance
① Raw material selection
• Chemical composition: Different chemical compositions have a significant impact on the performance of powder metallurgy parts. Carbon, copper, nickel, molybdenum, and other alloying elements are commonly used in iron-based sintered materials. Carbon can enhance the strength and hardness of materials, copper can improve the toughness and thermal conductivity of materials, nickel can enhance the corrosion resistance and strength of materials, and molybdenum can improve the high-temperature strength and wear resistance of materials. For example, adding an appropriate amount of nickel and molybdenum elements to powder metallurgy gears in automobile engines can improve the strength and wear resistance of the gears, ensuring their reliability under high-speed operation and high load.
• Particle size: Powder particle size can affect the performance of parts. Finer powder particle size can increase the contact area between powder particles, making it easier to form a dense structure during compression and sintering, thereby improving the density, strength, and hardness of the parts. However, excessively fine powders may lead to reduced fluidity, making the pressing process difficult. For example, when manufacturing high-precision powder metallurgy bearings, using uniformly and moderately sized powders can ensure the dimensional accuracy and performance stability of the bearings.
• Shape: Powder shape can also affect part performance. Spherical powder has good flowability and filling properties, which is conducive to pressing uniformly dense and high-density blocks. Irregular shaped powders may reduce the contact area between powders during compression, affecting the bonding strength during sintering. When manufacturing complex shaped powder metallurgy parts, spherical powder can better ensure the forming quality and performance of the parts.
• Purity: The purity of the powder is a key factor, and the presence of impurities can hinder effective bonding between powder particles, thereby affecting the performance of the product. High purity powder can reduce the adverse effects of impurities on material properties, improve the strength, hardness, and corrosion resistance of parts. When manufacturing powder metallurgy parts such as medical devices that require high material purity, high-purity metal powder must be used.
② Physical properties of materials
The size, shape, and distribution of powder particles have a significant impact on the performance of powder metallurgy parts. If the powder particles are too large or irregular in shape, it will reduce the contact area between the powders during compression, affecting the bonding strength during sintering. Uneven particle size distribution may lead to uneven shrinkage during sintering, affecting the dimensional accuracy of the parts. When manufacturing powder metallurgy heat sinks in electronic devices, it is required that the powder particles have uniform size and regular shape to ensure the heat dissipation performance and dimensional accuracy of the heat sink .

 

2.Requirements for materials with different properties
① Physical property
• Density: High density powders can be used to prepare high-density parts, thereby improving their strength and hardness. When selecting materials, priority should be given to metal powders with higher density. When manufacturing powder metallurgy parts in the aerospace field, in order to meet the requirements of high strength and lightweight, metal powders with moderate density and high strength are usually selected.
• Thermal expansion coefficient: Different metal or alloy powders have different thermal expansion coefficients. For powder metallurgy parts that need to work in high temperature environments, materials with lower thermal expansion coefficients should be selected to ensure the dimensional stability of the parts under temperature changes. For example, when manufacturing high-temperature components for engines, powder metallurgy high-temperature alloy materials with low thermal expansion coefficients are chosen.
② Mechanical properties
• Strength and hardness: The choice of material directly affects the strength and hardness of powder metallurgy parts. Adding appropriate amounts of alloying elements (such as nickel, chromium, molybdenum, etc.) to iron-based powders can significantly improve the strength and hardness of parts. Meanwhile, by optimizing the sintering process and subsequent processing techniques (such as heat treatment, carburizing, nitriding, etc.), the mechanical properties of the parts can be further improved. When manufacturing powder metallurgy gears and shaft parts for construction machinery, it is necessary to select materials with high strength and hardness, and perform appropriate heat treatment to meet their requirements for use under heavy loads and harsh working conditions.
• Wear resistance: Choosing appropriate materials (such as adding wear-resistant elements such as carbon, chromium, etc.) and adopting appropriate surface treatment techniques (such as carburizing, nitriding, shot blasting, etc.) can significantly improve the wear resistance of parts. When manufacturing powder metallurgy wear-resistant parts for mining machinery, wear-resistant elements such as carbon and chromium are added, and surface carburizing treatment is carried out to improve the wear resistance of the parts.
③ Corrosion resistance performance
Choosing suitable corrosion-resistant materials is crucial for powder metallurgy parts that need to be used in corrosive environments. Stainless steel powder, nickel based alloy powder, etc. have good corrosion resistance and can be used to manufacture corrosion-resistant parts. In the field of ocean engineering, stainless steel powder or nickel based alloy powder is usually used to manufacture powder metallurgy valves and pipeline connectors to ensure the service life of the parts in corrosive environments such as seawater.
④ Manufacturing cost
• Material cost: The cost of different materials varies greatly, and choosing the appropriate material can reduce manufacturing costs while ensuring the performance of the parts. Meanwhile, reasonable material utilization and waste recycling can further reduce production costs. When manufacturing general industrial powder metallurgy parts, if the performance requirements are not particularly high, low-cost iron-based powder materials can be chosen.
• Processing cost: The processing properties of materials, such as compressibility and sinterability, also affect manufacturing costs. Materials with good processing performance can reduce the scrap rate and processing time during the processing, thereby reducing processing costs. When selecting materials, it is necessary to comprehensively consider the processing performance and cost factors of the materials

 

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