学术
高合金钢Vanadis4凝固过程及组织
颜飞[1] 史海生[2] 樊俊飞[2] 徐洲[1]
[1]上海交通大学教育部高温材料及高温测试重点实验室,上海200030 [2]宝钢技术中心,上海201900
摘 要:
通过激光扫描共焦显微镜、X射线衍射、扫描电镜、电子探针、微区成分能谱分析和差示扫描量热法，研究了高合金Vanadis4（V4）模具钢（％：1．5C、8．OCt、1．5Mo、4．0V）的凝固过程及其微观组织。结果表明，V4钢基体为马氏体和残余奥氏体，基体中碳化物主要为MC与M7C3型。杆状、棒状或团块状VC分布在晶界。该钢在凝固时，首先发生结晶过程L→γ从液相中析出初生γ相，随着γ相不断析出，剩余液相中合金元素含量不断富集，达到共晶成分后将先后发生L→γ＋MC与L→γ＋M7C3共晶反应。[著者文摘]
文章出处:
《特殊钢》-2008年1期 -4-6页
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相关文章:
Solidification Process and Structure of High Alloy Steel Vanadis4
Yan Fei , Shi Haisheng, Fan Junfei and Xu Zhou （ 1 key Laboratory for High Temperature Materials and Test of Ministry of Education, Shanghai Jiaotong University, Shanghai 200030; 2 Technical Center, Baosteel, Shanghai 201900）
Abstract:
The solidification process and structure of high alloy steel Vanadis4 （ V4）- 1.5C, 8. 0Cr, 1.5Mo, 4. 0V have been investigated by laser scanning confocal microscope, X-ray diffraction, SEM, electron probe micro analyzer, energy dispersive X-ray spectrometer and differential scanning calorimetry. Results showed that the matrix of steel V4 consisted of martensite and retained austenite with main carbides MC and M7 C3. The Carbide VC with shape of pole, stick and block was distributed at grain boundary. The crystallization process L→γ first occurred during solidification of the steel to precipitate primary γphase, with increasing γphase the alloy elements continuously were enriched in remained liquid, with liquid reaching eutectic composition, the eutectic reactions L→γ＋ MC and L→γ＋ M7 C3 occurred in sequence. Material Index Steel Vanadis4, Structure, Solidification Process, Laser Scanning Confocal Microscope[著者文摘]
Key words:
Steel Vanadis4, Structure, Solidification＇Process, Laser Scanning Confocal Microscope
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