Powder Metallurgy

A.What is the powder metallurgy process？

The traditional powder metallurgy method referred to as the PM method, that is, the uniaxial rigid mold press forming method is a method commonly used in the current powder metallurgy industry, and belongs to the metal powder forming method in the powder metallurgy industry. Other methods include metal injection molding ( MIM), powder forging (P/F), hot isostatic pressing (HIP), and cold isostatic pressing (CIP).

B.Basic process of PM.

1. Preparation of raw material powder. The existing milling methods can be roughly divided into two categories: mechanical methods and physical-chemical methods. The mechanical method can be divided into mechanical pulverization and atomization; physical and chemical methods are further divided into electrochemical corrosion method, reduction method, chemical method, reduction-chemical method, vapor deposition method, liquid deposition method, and electrolysis method. Among them, the most widely used are the reduction method, atomization method, and electrolysis method.

2. The powder is formed into a compact of the desired shape. The purpose of forming is to make a green compact of a certain shape and size and make it have a certain density and strength. The molding method is basically divided into pressure molding and pressureless molding. The most widely used compression molding is compression molding.

3. Sintering of compacts. Sintering is a critical step in the powder metallurgy process. The formed compact is sintered to obtain the desired final physical and mechanical properties. Sintering is further divided into unit-system sintering and multi-system sintering. For solid-phase sintering of elemental and elemental systems, the sintering temperature is lower than the melting point of the metals and alloys used; for liquid-phase sintering of multi-system systems, the sintering temperature is generally lower than the melting point of the refractory component, and higher than the melting point of the fusible component. melting point. In addition to ordinary sintering, there are special sintering processes such as loose sintering, infusion method, and hot pressing method.

4. Post-processing of products. After sintering, various methods can be adopted according to different product requirements. Such as finishing, oil immersion, machining, heat treatment, and electroplating. In addition, in recent years, some new processes such as rolling and forging have also been applied to the processing of powder metallurgy materials after sintering and achieved ideal results.

C.The advantages of PM.

1. Most refractory metals and their compounds, pseudo-alloys, and porous materials can only be manufactured by powder metallurgy methods.

2. Since the powder metallurgy method can be pressed into the final size of the compact without or rarely needing subsequent mechanical processing, it can greatly save metal and reduce product cost. When the product is manufactured by powder metallurgy, the loss of metal is only 1-5%, while the loss of metal may reach 80% when produced by the general melting and casting method.

3. Since the powder metallurgy process does not melt the material in the material production process, it is not afraid of mixing impurities brought by the crucible and deoxidizer, and the sintering is generally carried out in a vacuum and reducing atmosphere, not afraid of oxidation, and will not give the material. Any contamination, it is possible to produce high-purity material.

4. Powder metallurgy can ensure the correctness and uniformity of material composition ratio.

5. Powder metallurgy is suitable for the production of products with the same shape and a large number of products, especially gears and other products with high processing costs. Manufacturing by powder metallurgy can greatly reduce production costs.

D.Application of PM.

1. Powder metallurgy is a universal process with a wide range of applications. There are many powder metallurgy parts in various assemblies of automobiles, such as engines, transmissions, and chassis. In addition, powder metallurgy is also used in aerospace, agricultural machinery, and other fields, as well as in the manufacture of small and large appliances, office machinery, electrical instruments, grassland and garden equipment, locks and hardware parts, medical equipment, off-road machinery, electric and Hand tools, sporting goods, and automatic recording equipment, etc.

2. Powder metallurgy parts can be surface coated to make them decorative, corrosion-resistant, or wear-resistant. Parts with precision or high dimensional tolerances can be reshaped or re-pressed. Parts that cannot be press-formed can be machined.

3. The mass of most powder metallurgy parts is not more than 2.2kg, but parts with mass less than 1g to 16kg can also be manufactured.

4. The automotive industry is the largest market segment for powder metallurgy, accounting for 73% of total PM parts sales. The market shows no signs of slowing down as the aluminum powder market surges as automotive OEMs seek to reduce weight and deliver better performance. The upcoming mandates on fuel economy and the shift to electric vehicles will continue to push automakers toward designing lightweight vehicles and components, a boon for the PM market.

5. In terms of appliances and tools, PM is expected to increase by 4% year on year this year due to the continued demand for these items in our daily lives. PMs can be found in washing machines, lighting controls, locks, and other equipment as well as gears, levers, couplings, cams, pulleys, sockets, etc.

6. PM is also widely used in the agricultural and construction industries, from basic lawn equipment and garden care to heavy-duty off-highway machines. As the industrial sector becomes more automated, powder metallurgy will continue to play a role in the future as manufacturers look to reduce manufacturing costs through forging and machining.

7. As technology emerges to bring more medical implants, artificial joints, and new surgical tools to market, the presence of powder metallurgy continues to increase due to its ability to produce high volume precision parts into a net shape. In addition, however, PM can reduce costs, reduce scrap and produce components that would not be economically viable using other methods, so healthcare companies are rapidly adopting the technology.

E.Packing and Shipping.

1. Each product is carefully packed with bubble bags and packed in cartons. In order to cause scratches due to knocks, which will affect the quality and use of the product, we will use wooden boxes specially designed for export for packaging and transportation.

2. All products will be transported according to customer needs, such as express, air shipping, sea shipping, and railway shipping.

F.FAQs.

1. How can I get the quotation?

---We send a quote based on drawing, quantity, weight, and material(a real sample is acceptable).

2. If I don't have the drawing, can you make a drawing for me?

---Yes, we are able to make the drawing of your sample duplicate the sample.

3. What is your payment method?

---Tooling:50% T/T advanced,50% T/T balance when sample approval.

Items bulk order:30% deposit T/T,70% balance T/T against the copy of B/L.

4. What kind of file format can you open?

---PDF, IGS, DWG, X_T, STEP(STP).

5. What surface treatment can you do?

---Including powder coating, sandblasting, painting, polishing, acid pickling, anodizing, enamel, zinc plating, hot-dip galvanizing, and chrome plating.

6. What is your way of packing?

---Each product is carefully packed with bubble bags and packed in cartons. In order to cause scratches due to knocks, which will affect the quality and use of the product, we will use wooden boxes specially designed for export for packaging and transportation.

7. Do you have a sub-company overseas?

---Yes, we have a sub-company in Michigan, USA.