中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2012年
11期
1354-1359
,共6页
潘品李%钟约先%马庆贤%袁朝龙%朱思阳
潘品李%鐘約先%馬慶賢%袁朝龍%硃思暘
반품리%종약선%마경현%원조룡%주사양
316LN钢%主管道%热变形%动态再结晶
316LN鋼%主管道%熱變形%動態再結晶
316LN강%주관도%열변형%동태재결정
316LN steel%main pipe%hot deformation%dynamic recrystallization
通过热力学模拟实验,研究了316LN钢在900～1200℃、应变速率为0.01～1s-1变形条件下的高温变形性能,得到了其在大型锻造件生产条件下的流动应力曲线。通过对实验数据进行多元线性拟合,建立了316LN钢的动态再结晶模型。通过变形试样淬火后显微组织的研究分析,验证了所建立模型的正确性。比较了动态再结晶对电渣重熔钢锭和真空浇铸钢锭晶粒细化效果的差异,从而初步确定了316LN钢合理的锻造工艺区间。
通過熱力學模擬實驗,研究瞭316LN鋼在900～1200℃、應變速率為0.01～1s-1變形條件下的高溫變形性能,得到瞭其在大型鍛造件生產條件下的流動應力麯線。通過對實驗數據進行多元線性擬閤,建立瞭316LN鋼的動態再結晶模型。通過變形試樣淬火後顯微組織的研究分析,驗證瞭所建立模型的正確性。比較瞭動態再結晶對電渣重鎔鋼錠和真空澆鑄鋼錠晶粒細化效果的差異,從而初步確定瞭316LN鋼閤理的鍛造工藝區間。
통과열역학모의실험,연구료316LN강재900～1200℃、응변속솔위0.01～1s-1변형조건하적고온변형성능,득도료기재대형단조건생산조건하적류동응력곡선。통과대실험수거진행다원선성의합,건립료316LN강적동태재결정모형。통과변형시양쉬화후현미조직적연구분석,험증료소건립모형적정학성。비교료동태재결정대전사중용강정화진공요주강정정립세화효과적차이,종이초보학정료316LN강합리적단조공예구간。
Based on the thermodynamics research,which was conducted in the temperature range 900~1200℃ and the strain rate 0.01~1s-1,the flow stress curves of 316LN steel under the common production condition of heavy forging was investigated.Also,by multiple linear regression on the experimental data,a dynamic recrystallization model of 316LN was established.Then the microstructure of the thermal simulation samples after quenching was studied,which shows the validity of the model.The differences of grain refinement by dynamic recrystallization between the steels by electroslag remelting and vacuum casting were compared,then the optimized range of forging parameters for 316LN was suggested.
