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利用透射电子显微术（ＴＥＭ）研究了一种高钴、镍超高强度钢不同时效温度下的碳化物的析出过程及钢的二次硬化机制。研究结果表明，马氏体板条内和板条间开始析出合金碳化物Ｍ２Ｃ的初始回火温度为４００℃左右；４４０℃以下温度回火钢的二次硬化行为是由于合金碳化物Ｍ２Ｃ对尚未回复和再结晶的位错型马氏体板条弥散强化的结果；６５０℃过时效后在钢的回火组织中还发现了一种正交结构的碳化物相，其点阵常数α＝０．４４８ｎｍ，ｂ＝１．４０ｎｍ，ｃ＝１．２１ｎｍ。
Transmission electron microscopy (TEM) was used to study the precipitation process of carbide and the secondary hardening mechanism of steel under different aging temperatures for a high cobalt and nickel super high strength steel. The results show that the initial tempering temperature of M2C precipitated in the laths and laths is about 400 ℃. The secondary hardening behavior of tempering steels at temperatures below 440 ℃ is due to the fact that the M2C of alloy carbides has not been Recovering and recrystallization dislocation-type martensite lamella dispersion strengthening results; 650 ° C after aging in the tempering of the steel also found an orthorhombic carbide phase, the lattice constant α = 0 .448 nm, b = 1.40 nm, c = 1.21 nm.