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Japan's Osaka Prefecture University and other improved internal and external ring data to improve bearing heat resistance (Figure)
Source: China Bearing Network Time: 2014-07-30
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Figure 1: Ball bearings with higher heat resistance than the original product.
The photo shows the product of Ni-based metal compound for the inner and outer rings.
Osaka Prefecture University Graduate School of Engineering, Professor of Engineering and Information Engineering, Professor Takasugi Takashi and Associate Professor Jin Ye Tai Xing; and Japan's Pillow Block (Headquarters: Osaka Prefecture Campus Gap 3.3四腿刃猿錾墓鲋橹岢1). The inner and outer rings of the bearing are made of nickel (Ni)-based metal compound alloy; the use of silicon nitride balls and solid smooth adherers; extended service life at high temperatures.
The research team showed that in the past, when the heat resistance of the ball bearing was improved, the ceramic ball and the solid smoothing agent were used. The correlation study between the inner and outer ring materials was not developed; the inner and outer rings of the existing product were made of stainless steel SUS440C; Around 300 °C.
Therefore, this study used a single-phase NiSiTi intermetallic compound and a two-phase NiAlV intermetallic compound (Ni-based superalloy 0?? 穑┠穑┠趾 趾 é¹±é‘ è°•é¥£ 谕饣 谕饣 谕饣 柿?? at 600 ° C high temperature; Using internal and external ring data, (1) single-phase NiSiTi intermetallic compound, (2) dual-phase NiAlV intermetallic compound, and (3) SUS440C three kinds of ball bearings were selected; the maximum length was about 100 hours (the life of SUS440C bearing) Rotation test.
Figure 2: Bearing and wear powder (top) after rotation at atmospheric pressure of 600 °C for about 100 hours; wear scar at the bottom of the inner ring channel (bottom). From left to right (3), (1), 2) Kinds of bearings.
The test results show that the (A) and (2) bearings have less wear powder at the bottom of the high temperature test tank than the (3) bearing (Fig. 2). Others; (1) and (2) The bearing is compared with the (3) bearing; the inner and outer ring track faces have less irregularities; the roll marks have a smaller width; and (1) and (2) have no aging; the inner and outer rings have a lighter appearance. The bearing life is calculated according to the wear amount; the (1) bearing can reach 8336 hours; the (2) can reach 2072 hours; the life in the high temperature air environment is greater than the 100 hours of the (3) bearing; Reflects excellent heat resistance.
After the two bearings (1) and (2) reach the useful level; can be used in the high temperature environment after the original cooling; complete the equipment that does not require cooling. Thus, the equipment can be miniaturized and the cost can be reduced. These bearings can also be used in equipment operating in high-temperature furnaces; then energy-saving is completed. And the control accuracy of temperature and air conditions in the furnace can be improved. Especially the bearing of (1); because it has more than 30% of room temperature plastic processing Ability; therefore, there are also advantages in the calendering process that can be used in production.
Others; (1) and (2) two bearings also have excellent corrosion resistance; can be used in high temperature and chemical corrosion environments. Direct transfer equipment can be placed in the corrosion solution.
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