热作模具钢DM的高温稳定性和热疲劳性能
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施渊吉,于林惠,于照鹏,成功,吴晓春,滕宏春
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High Temperature Stability and Thermal Fatigue Behavior of DM Hot Working Die Steel
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Yuanji SHI,Linhui YU,Zhaopeng YU,Gong CHENG,Xiaochun WU,Hongchun TENG
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| 表4 DM钢中碳化物的生成自由能ΔGMxCy |
| Table 4 The free energy of formation for the carbides in ΔGMxCy DM steel |
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| Reaction equations | ΔG/J·mol-1 | Temperature range/℃ |
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| 3[Fe]α+[C]=Fe3C | ΔGFe3C=6450+23.09T | 25~727 | | 7[Cr]+3[C]=Cr7C3 | ΔGCr7C3=-356120+398.25T | 25~1857 | | 23[Cr]+6[C]=Cr23C6 | ΔGCr23C6=-887890+1156.19T | 25~1520 | | 2[Mo]+[C]=Mo2C | ΔGMo2C=-123410+135.54T | 25~1100 | | 3[Fe]+3[Mo]+[C]=Fe3Mo3C | ΔGFe3Mo3C=-149497+154.21T | 25~900 | | [Mo]+[C]=MoC | ΔGMoC=-125500+89.98T | 25~700 | | [V]+[C]=VC | ΔGVC=-77180+92.29T | 25~2000 |
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