采用透射电子显微镜、X射线衍射仪、热模拟试验机以及氧氮分析仪分析了4种含氮和不含氮的冷轧辊材料在微观组织以及热处理特性等方面的差异,并研究了氮对冷轧辊材料组织的影响.结果表明,冷轧辊材料中加入氮后,可形成热力学性质非常稳定,细小弥散的M(C,N)型碳氮化物.这些碳氮化物在奥氏体化时能够钉扎晶界,抑制晶粒长大.冷轧辊材料中加入适量氮后,能够在淬火温度提高20～30℃的情况下保持相同的晶粒度水平.此外,固溶在基体中的氮能够增强冷轧辊材料的淬透性,降低临界冷却速度,同时也将使Ms点小幅度下降.
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