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利用膨胀法并配合光学及电子显微分析，较为系统地研究了６０Ｓｉ２Ｍｎ钢在连续加热条件下的相变规律及特点；测定了与其相应的奥氏体形成图。结果表明，钢中珠光体向奥氏体的转变是在一个温度区间内完成的，该区间随加热速度的增加，逐渐变宽并移向高温区；钢中粒状合金渗碳体。在Ａ＿（Ｃ３）温度以上开始大量溶解，且在更高的温度才趋于消失，因此，在非平衡加热条件下，于Ａ＿（Ｃ３）温度以上奥氏体可与Ｍ＿３Ｃ颗粒在较宽温度区间内共存。
By means of dilation and optical and electron microscopic analysis, the phase transformation regularities and characteristics of 60Si2Mn steel under continuous heating were systematically studied. The corresponding austenite formation diagram was also measured. The results show that the transformation of pearlite to austenite in steel is completed in a temperature range, which widens and moves to high temperature zone with the increase of heating rate. At the beginning of A_ (C3), a large amount of dissolution began to occur and it disappeared at higher temperature. Therefore, in the non-equilibrium heating condition, the austenite above the A_ (C3) temperature could be mixed with the M_3C particles in a wider temperature range Coexistence.