釩對H13鋼熱穩定性的影響
黃山1,2，吳日銘1,2，胡濤1,2，陳蒙1,2（1.上海工程技術大學材料工程學院，上海201600；2.上海市激光先進制造技術協同創新中心，上海201600）
摘要：為研究V對熱作模具鋼熱穩定性的影響，制備不同V含量的H13試樣鋼。通過回火硬度曲線以及在600℃回火時熱穩定曲線，探討了不同V含量對H13鋼的熱穩定性影響，結合JMA方程分析了V對回火穩定性動力學過程的影響。結果表明，添加V后H13鋼二次硬化現象顯著，且二次硬化峰在530℃左右，并且0.55%V的試驗鋼的熱穩定性最好，與理論分析結果一致，因此H13鋼添加0.55%的V能有效抑制碳化物的粗大，形成細小彌散的碳化物、提高硬度、增強熱穩定性。
關鍵詞：釩；H13鋼；熱穩定性；JMA方程
中圖分類號：TG142.1文獻標識碼：B文章編號：1001-2168（2021）10-0056-05
DOI：10.16787/j.cnki.1001-2168.dmi.2021.10.013
Effect of vanadium on thermal stability of H13 steel
HUANG Shan1,2, WU Ri-ming1,2, HU Tao1,2, CHEN Meng1,2 (1.School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201600, China; 2.Shanghai Collaborative Innovation Center of Laser Advanced Manufacturing Technology, Shanghai 201600, China)
Abstract: In order to study the effect of vanadium on the thermal stability of hot work die steel, H13 steel samples with different vanadium content were prepared. Through the tempering hardness curve and the thermal stability curve when tempering at 600 ℃, the influence of different vanadium content on the thermal stability of H13 steel was discussed. Combined with JMA equation, the influence of vanadium element on the dynamic process of tempering stability was analyzed. The results showed that the addition of vanadium element made the secondary hardening phenomenon of H13 steel obvious, and the secondary hardening peak was about 530 ℃, and the thermal stability of the 0.55%V test steel was the best, which was consistent with the theoretical analysis results. Therefore, adding 0.55%V could effectively inhibit the coarsening of carbides, form fine dispersed carbides, increase hardness and enhance the thermal stability of H13 steel.
Key words: vanadium; H13 steel; thermal stability; JMA equation