Iron-based Powder Metallurgy Sintered Parts

Forming is an important process step of powder metallurgy technology, and advanced forming technology is the key to the preparation of high-performance powder metallurgy materials and the realization of near-net shape manufacturing. Zhongwei Precision and Advanced Powder Metallurgy Forming Technology Research Laboratory is mainly engaged in basic and applied research of advanced powder metallurgy forming technologies such as powder injection molding, high-speed pressing, hot isostatic pressing and infiltration technology. At the same time, research on advanced materials such as high-performance Iron-based powder metallurgy sintered parts and parts, powder superalloy, powder high-speed steel, powder metallurgy TiAl and Ti alloy, high thermal conductivity electronic packaging materials, new battery materials, and powder metallurgy process simulation technology.

Qinhuangdao Zhongwei Precision Machinery Co., Ltd. Powder Metallurgy Division was established in 2007 and is located in Qinhuangdao City, Hebei Province. There are two production lines for metal injection molding MIM process and powder metallurgy PM. The company's existing self-developed products: German Maya warp knitting machine Sensing chain blocks, electric actuator gears, automobile oil pump rotors, washing machine transmission gears and other products, the powder metallurgy products produced cover automobiles, motorcycles, power tools, home appliances, textile machinery parts and other fields. Our company is a comprehensive high-tech enterprise integrating R&D, production and sales of copper alloy, iron base, stainless steel base, aluminum alloy, nickel alloy, cobalt alloy, tungsten alloy, cemented carbide and powder metallurgy structural parts.

Product Description

1. Implementation standards: the company strictly implements ISO9001, ISO14001, IATF16949 certification

The products have passed the certification of ROHS, FDA EU, etc.

2. Product material standards: ISO, GB, ASTM, SAE, EN, DIN, BS, AMS, JIS, ASME, DMS, TOCT, GB

3. Main processes: metal injection molding MIM, powder metallurgy PM, investment casting, die-casting aluminum,

4. Available materials for powder metallurgy:

Copper alloy, iron base, titanium alloy, stainless steel base, aluminum alloy, nickel alloy, cobalt alloy, tungsten alloy, cemented carbide, hydroxy alloy, soft magnetic material and 3D printing can be customized according to customer requirements.

The current stage of Zhongwei Precision Machinery and the research project of the laboratory

1. Preparation technology of large-scale high-purity rare metal products

In response to the high-end equipment and microelectronics industry's demand for large-scale, high-purity rare metal products, the starting point is to enhance the technological innovation capability and overall competitiveness of the rare metal material industry, and the national high-end equipment and strategic emerging industry development needs are the driving force. Trend and action law of impurity elements of high-purity rare metals, microstructure evolution law and precise control during sintering and deformation of large-sized rare metals, non-uniform grain growth mechanism and grain size control of ultra-high-purity tungsten and tungsten alloy targets, etc. On the basis of key scientific problems, efforts are made to solve major common problems such as product homogeneity and low value in the rare metal material industry, and breakthroughs in the control of impurity elements in the preparation process, high temperature and high pressure densification of large-size products, grain uniformity control, And high-precision deformation processing and precision preparation technologies. Develop large-scale tungsten crucibles/tungsten tubes, tungsten plates, molybdenum plates, rhenium plates, tungsten and tungsten alloy targets, ultra-pure silicon single crystal rings and other rare metal products, and realize large-scale heating elements/heat screens and crucibles for high-end equipment Integrated and integrated manufacturing, and the industrialized production capacity of high-purity rare metal products with an annual output of 1,500 tons. The implementation of the project will promote the structural adjustment and industrial upgrading of the high-purity rare metal material industry, and realize the transformation of my country's rare metal material industry from large to strong, and the technical level from following to parallel and leading.

2. Copper alloy brake pad preparation and industrialization technology

The basic braking device of high-speed train generally adopts disc brake, which uses the friction force generated by the brake pad and the brake disc to realize deceleration or stop. The brake pad and the brake disc form a pair of friction pairs. The brake pad is a key component to ensure the safety of high-speed trains. Its performance directly affects the braking performance, the service life of the brake disc and the brake pad itself, and the safety of the train. run. The main research contents of this project include: study the precise control principle and technology of copper and copper alloy powder characteristics; study the influence of powder characteristics on the preparation process and performance of brake pad materials, and develop special powder preparation technology for brake pads. Study the influence of binder, lubricant, mold structure and pressing method on the properties of the green compact; study the influence of the surface modification of lubricating components, pre-alloying method, and sintering process on the density and microstructure of the brake pad, clarify the copper Densification mechanism of alloy brake pads; research on the principles and techniques of microstructure regulation of brake pad materials. Obtain copper alloy brake pads for high-speed trains with speeds of 350km/h and above.

3. Basic research on intelligent preparation and forming technology of metal materials---Scientific basis for controlled solidification and controlled forming of high-performance metal materials

Aiming at the common basic problems that need to be solved in the intelligentization of metal material control forming technology, the focus is on the research on the structure change and genetic behavior in the whole process of material solidification and processing, the theoretical model of the preparation and processing process, and the construction of process simulation and microstructure prediction platform. Provide tools for forming process optimization; use artificial intelligence technology such as neural network and database technology to analyze historical production data, and establish intelligent forecasting and control systems for material organization, performance, and shape and size.

4. Plasma atomization preparation technology of refractory metal and its compound spherical powder ---- high-performance metal material controlled solidification short process preparation and processing technology

Spherical powders of refractory metals and alloys are more and more widely used because of their excellent fluidity and high packing density. In the field of thermal spraying, the spherical metal powder has better fluidity, and the resulting coating is more uniform and dense, so the product has better wear resistance. In the field of powder metallurgy, spherical metal powder is the high-quality raw material expected by the powder metallurgy industry. Aiming at the development direction and market demand of refractory metals, this project studies the key technology of directly preparing spherical powders of refractory metals and their compounds by plasma, and lays a technical foundation for realizing the industrial production of low-cost, high-performance spherical powders.

5. Basic research on near-net formation of TiAl intermetallic compounds

TiAl intermetallic compounds are the most promising new generation of lightweight superalloys. High Nb-TiAl alloys are high-performance TiAl alloys with independent intellectual property rights developed by Academician Chen Guoliang of Beijing University of Science and Technology. very important application prospects. This project will focus on the problems of low room temperature ductility and difficulty in plastic processing and forming of high Nb-TiAl alloys, and will carry out research on the principle and technology of radio frequency plasma atomization powder-powder injection molding. The research focuses on the melting, crushing, spheroidizing and solidification laws of high Nb-TiAl alloy coarse powder in plasma; low residual binder design and feeding rheological behavior; forming billet degreasing and sintering densification laws; sintered microstructure and sintering The principle and method of product size control, etc., lay a theoretical and technical foundation for the development of high Nb-TiAl alloy fine spherical powder preparation technology and direct forming technology of complex shape parts. This study is of great significance for advancing the application of high Nb-TiAl alloys.

6. Materials Science Data Sharing Network

Based on the integration and reconstruction of existing and relatively mature materials science data resources, establish cross-departmental, cross-regional, multi-level, easy-to-manage, heterogeneous distribution that meets different needs of national construction, education, scientific research, production, management, etc. , orderly sharing of material data system, forming a material data service system and sharing network with complete and complete data, safe and reliable storage, flexible and convenient use, maximize the benefits of data and information, and meet the urgent needs of national construction, social development and scientific and technological innovation. need. This project will build five data sharing resource nodes for different material fields, including non-ferrous metal materials and special alloys, ferrous metal materials, composite materials, organic polymer materials and material basic data sharing resource nodes, as well as five other material data nodes. Design and frame construction of resource nodes, formulate relevant standards or specifications for material science data sharing, build a shared network and a shared network management and service center, and form a set of co-construction and sharing mechanism and operation management system and a relatively complete service mechanism.

7. Research on the preparation technology of argon atomized superalloy powder

Through the research on the key technology of superalloy powder preparation, break through the technical bottlenecks restricting the development of advanced aero-engine and aviation industry, such as the preparation of high-performance nickel-based superalloy powder, realize the domestic supply of argon atomized powder for high-quality powder discs, and prepare products that meet the The demand for powder turbine disks has formed the R&D and industrialization capability of batch preparation of high-performance metal powder and powder superalloy turbine disks, which can meet the development needs of major national projects such as large aircraft.

8. Research on powder superalloy turbine disk forming technology

Through the research on key technologies such as the formation of key components of superalloy turbine disks, we will break through the technical bottlenecks restricting the development of advanced aero-engines and the aviation industry, such as the forming of high-performance powder turbine disks. And powder superalloy turbine disk research and development and industrialization capabilities, to meet the development needs of major national projects such as large aircraft. Objective: Focus on the special forging or extrusion forming process of powder superalloy fine-grained billets, and the properties of the prepared FGH96 alloy powder disk meet the technical standards of large aircraft engine disk parts, and pass the test assessment. Research contents: (1) Research on preparation technology of fine-grained billet for superplastic isothermal forging (2) Research on superplastic isothermal forming and heat treatment technology of powder turbine disk (3) Research on microstructure and properties of powder superalloy components (4) FGH96 alloy powder turbine Disc testing and examination.

Post Casting Process

1. Heat treatment: annealing, carbonization, tempering, quenching, normalizing, surface tempering

2. Processing equipment: CNC, WEDM, lathe, milling machine, drilling machine, grinder, etc.;

3. Surface treatment: powder spraying, chrome plating, painting, sandblasting, nickel plating, galvanizing, blackening, polishing, bluing, etc.

Moulds and Inspection Fixtures

1. Mold service life: usually semi-permanent. (except for lost foam)

2. Mold delivery time: 10-25 days, (according to product structure and product size).

3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.

Quality Control

1. Quality control: the defective rate is less than 0.1%.

2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements

3. Testing equipment: flaw detection, spectrum analyzer, golden image analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine;

4. Provide after-sales service.