【摘要】：采用內(nèi)耗和三維原子探針結(jié)合硬度測(cè)試研究了深冷處理對(duì)高碳高合金工具鋼SDC99不同回火溫度下組織和碳偏聚情況的影響。結(jié)果表明:深冷處理顯著提高工具鋼SDC99的硬度,深冷處理試樣較淬火試樣硬度提高2HRC,深冷處理并200℃回火試樣比常規(guī)熱處理試樣硬度提高1.5HRC;深冷處理后碳原子與位錯(cuò)的相互作用增強(qiáng),內(nèi)耗的Snoek-Kê-K?ster(SKK)峰強(qiáng)度提高,位錯(cuò)密度增加;深冷處理后碳原子的偏聚程度加劇,淬火、深冷、淬火并200℃回火、深冷并200℃回火試樣中富碳相的碳濃度峰值分別為2%、8%、8%和15%(原子分?jǐn)?shù))。
[Abstract]:The effects of cryogenic treatment on microstructure and carbon segregation of high carbon and high alloy tool steel SDC99 at different tempering temperatures were studied by internal friction and three-dimensional atomic probe hardness test. The results show that the hardness of tool steel SDC99 is significantly improved by cryogenic treatment, the hardness of cryogenic treated sample is 2HRC higher than that of quenched sample, and the hardness of cryogenic treated and tempered sample is 1.5HRC higher than that of conventional heat treatment sample. After cryogenic treatment, the interaction between carbon atoms and dislocations is enhanced, the intensity of Snoek-K 錨-K?ster (SKK) peak of internal friction is increased, and the dislocation density is increased. After cryogenic treatment, the degree of segregation of carbon atoms intensifies, quenching, cryogenic, quenching and tempering at 200 鈩，

本文編號(hào)：2450077