Production Introduction
| Model | sleeve bushing |
| Features | Reduces the frequency of lubrication |
| Maintains oil film, resulting in improved wear resistance | |
| Has superior foreign matter immersion characteristics, impact resistance, and noise suppressing characteristics | |
| Has superior chemical resistance and corrosion resistance | |
| Materials for machining are also available |
Service Range
| Lubrication condition | Periodic lubrication | oil lubrication |
| Service temperature range ℃ | -40 ~ +100 | |
| Allowable max. pressure P N/mm2 {kgf/cm2} | 20{204} | |
| Allowable max, velocity V m/s {m/min} | 3.35{201} | 15.00{900} |
| Allowable max, PV vaule N/mm2 . m/s {kgf/cm2. m/min} | 2.45{1500} | 3.25{1990} |
Development and application of SPS at home and abroad
SPS technology is heated sintering by direct pulse current between powder particles, so it is also known as plasmaactivatedsintering or plasma-assistedsintering (plasma-activated sintering-PAS or plasma-assisted-intering-pas) in some literature [1,2]. As early as 1930, American scientists put forward the principle of pulse current sintering, but until 1965, pulse current sintering technology was applied in the United States, Japan and other countries. Japan obtained the patent of SPS technology, but failed to solve the low production efficiency of the technology, so the technology was not promoted and applied.
In 1988, Japan developed the first industrial SPS device and popularized it in the field of new material research. After 1990, Japan launched the third generation of SPS products for industrial production, with sintering pressure of 10~ 100T and pulse current of 5000~8000A. Recently, a large SPS device with a pressure of 500T and a pulse current of 25000A was developed. Due to the advantages of SPS technology, such as fast, low temperature and high efficiency, many foreign universities and research institutions have been equipped with SPS sintering system in recent years, and use SPS to carry out research and development of new materials [3]. In 1998, Sweden purchased SPS sintering system and conducted a lot of research work on carbide, oxide, bioceramics and other materials [4].
In recent three years, domestic researches on the preparation of new materials with SPS technology have also been carried out [1,3], and several SPS sintering systems have been introduced, which are mainly used for sintering nanomaterials and ceramic materials [5~8]. SPS, as a new material preparation technology, has attracted extensive attention at home and abroad.
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