婷婷五月深深久久精品

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    Some domestic bearing steel smelting oxygen levels fall from month to month

    The beginning of the year, the domestic some tried to strengthen the joint between colleges, 40 tons of electric furnace smelting of high-end bearing steel of high quality innovation. How to look from the bearing number bearing classification 


    Since this year, the domestic some tried to strengthen the joint between colleges, 40 tons of electric furnace smelting of high-end varieties of bearing steel quality control level continues to increase, a key indicator of oxygen content is down 5.3% from a year earlier, started in May, and continuously break through the best results. 


    High requirement of bearing of steel against steel purity, oxygen content and inclusion in steel are very strict. Along with market development is more and more fast, lightweight and long life of bearing all need bearings has a very high end technology and strict testing, purity of bearing steel production are put forward higher requirements, and high and low oxygen content, it is very important criteria. 

    To advance the high-end bearing steel series product quality improvement work, refining this year and the related institutions of higher learning in the form of joint research and development, to the oxygen content of bearing steel production, the generating mechanism of inclusion and so on has carried out systematic research and analysis, and on this basis, the bearing steel finished product oxygen content reduced month by month, the year's performance also have guarantee. Heat pump cooling method 


    婷婷五月深深久久精品