采用金相显微镜、扫描电镜等对GOST-2钢-60 ℃低温冲击韧性不合格车轮进行检验分析，结果表明：其主要原因是磷含量高、MnS夹杂多、存在带状组织，且晶粒尺寸较大。在生产中通过加入铝钒元素细化晶粒，并采用低氧钢、低磷钢及超低硫钢冶炼工艺和钙处理等措施，消除了钢中的条状夹杂物，改善了车轮的低温冲击韧性，显著提高了产品的合格率。
The microscope and scanning electron microscope were used to analyze the GOST-2 wheel steel with failure low temperature impact toughness at -60 ℃. The results show that the main reason is the high phosphorus content, the large amount of MnS inclusions, band structure, and coarse grain in the steel. Adding the grain refinement elements of aluminum and vanadium, and adopting smelting process of low oxygen steel, low phosphorus steel and ultra-low sulfur as well as calcium treatment, the strip inclusions in the steel are eliminated; and the impact toughness of steel at the low temperature is improved, the qualified rate of the product is significantly increased.
参考文献
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| [2] | 潘涛，崔银会等.不同加热温度下钒对车轮钢强韧性的影响.钢铁,2006,41(3):71-[2] 顾林豪，隋鹤龙等.Q345E厚板低温冲击韧性不合格的原因分析与改进措施.首钢科技,2009,(3.):15-17 |
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