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步冷試驗(yàn)
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以廣泛應(yīng)用于加氫反應(yīng)器材料 2 .2 5Cr- 1Mo鋼為研究對(duì)象 ,對(duì)步冷試驗(yàn)溫度曲線進(jìn)行分析。進(jìn)行了步冷加 5 2 4℃× 2 4h和步冷加 5 2 4℃× 2 7h熱處理試驗(yàn)。結(jié)果表明 ,步冷試驗(yàn)溫度曲線中的第三階段 5 2 4℃× 2 4h熱處理在再次步冷試驗(yàn)過程中具有脆化傾向。同時(shí)對(duì)步冷試驗(yàn)溫度曲線進(jìn)行修正 ,提出了修正步冷試驗(yàn)溫度曲線。
Based on the tests of step cooling plus 524 ℃×24 h and step cooling plus 524 ℃×27 h heat treatment for 2.25Cr-1Mo steel which is widely used in hydrogenation reactors , temperature curve for step cooling was analyzed . The test results show that the third step heat treatment (524 ℃×24 h) in temperature curve for step cooling acts as further embrittling for embrittled materials. In the mean time , temperature curve for step cooling was modified and a modified temperature curve for step cooling was f...