结果表明，断裂的原因是材质不合格，存在成分偏析，热处理工艺不符合规定以及硫元素含量偏高。
The preliminary research showed that the material used of the piston rod is unqualified , casting aliquation and much S element result in cracking on the edge of the casting aliquation.
根据鞍钢管线钢连铸坯硫印分析结果数据库，对影响中心偏析的工艺进行了系统的分析。
According to the analysis results from the database of the sulfur print of slab in an steel, the technological parameters influencing central segregation in micro-alloyed steels were analyzed.
结果表明，悬浮浇注能有效地改善轴承钢锭的温度分布，极大地改善钢锭横截面上的碳、硫、磷元素的中心偏析，提高了轴承钢锭的质量。
The results show that suspension casting can make the temperature field uniform, eliminate macro segregation of c, s and p, and improve the quality of bearing steel ingot.
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