本文選題：彈簧鋼　切入點：夾雜物　出處：《煉鋼》2015年06期

【摘要】：通過對國產(chǎn)55SiCrA、浦項SAE9254V及新日鐵65Si2CrV氣門簧用彈簧鋼進(jìn)行全面質(zhì)量對比分析,國產(chǎn)與國外彈簧鋼的主要差異為:國產(chǎn)彈簧鋼中w(Als)高達(dá)40×10~(-6),夾雜物中w(Al_2O_3)高達(dá)42%,夾雜物長寬比均小于3,寬度尺寸大,且其電解得到了高M(jìn)gO類及高Al_2O_3類的大型不利夾雜物。生產(chǎn)過程應(yīng)降低鋼中w(Als)至20×10-6以下,使用低鋁含量的合金,采用低堿度及低Al_2O_3含量的精煉渣進(jìn)行冶煉,避免使用含Al_2O_3的鎂質(zhì)耐火材料,降低夾雜物中w(Al_2O_3)至10%~20%,提高夾雜物塑性。另外國產(chǎn)彈簧鋼組織含有較多的先共析鐵素體,且脫碳層控制較差。
[Abstract]:The total quality of spring steel used in 55SiCrA, Posco SAE9254V and Nippon Railway 65Si2CrV valve spring was compared and analyzed.The main differences between domestic and foreign spring steels are as follows: in domestic spring steel, the number of wo / Als is up to 40 脳 10 ~ (-6) ~ (-6), and the number of W / S / Al _ 2O _ (3) in inclusions is as high as 42. The ratio of length to width of inclusions is less than 3, the width is large, and the large unfavorable inclusions of high MgO and high Al_2O_3 are obtained by electrolysis.In addition, the domestic spring steel structure contains more proeutectoid ferrite, and the decarburization layer is not well controlled.
【作者單位】： 北京科技大學(xué)鋼鐵冶金新技術(shù)國家重點實驗室;河南濟源鋼鐵集團(tuán)有限公司;
【分類號】：U465.11;TG142.1
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本文編號：1700736