<strong>850 ℃</strong>涡轮盘用新型变形高温合金<strong>GH4975</strong>挤压棒材热变形规律研究

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850 ℃涡轮盘用新型变形高温合金GH4975挤压棒材热变形规律研究

张勇¹(

), 李鑫旭¹, 韦康¹, 万志鹏¹, 贾崇林¹, 王涛¹, 李钊¹, 孙宇², 梁红艳³

Hot Deformation Characteristics of Novel Wrought Superalloy GH4975 Extruded Rod Used for 850 ℃ Turbine Disc

ZHANG Yong¹(

), LI Xinxu¹, WEI Kang¹, WAN Zhipeng¹, JIA Chonglin¹, WANG Tao¹, LI Zhao¹, SUN Yu², LIANG Hongyan³

图3. GH4975合金热变形过程中相关参数之间的关系

Fig.3. Relationships between ln $ε ˙$ and lnσ (a), ln $ε ˙$ and σ (b), ln $ε ˙$ and ln[sinh(ασ)] (c), ln[sinh(ασ)] and 1000/T (d), lnZ and ln[sinh(ασ)] (e) ( $ε ˙$ —strain rate; σ—stress; α, β and A—material constants; Z—Zener-Hollomon parameter; T—temperature; n and n₁—stress exponents; r²—correlation coefficient)