在Gleeble 1500热模拟试验机上,通过应力松弛实验研究了Mn-Nb-Cu-B低碳贝氏体钢在不同工艺条件下析出行为,得到了不同变形量、不同变形速率下的析出动力学曲线。同时,根据实验结果,确定了所研究钢种的析出动力学方程的参数,并计算了析出开始时间。结果表明,在较高温度下,计算值与实验观测值吻合得较好。研究结果对制订合理变形工艺有帮助。
Precipitation behavior of austenite in Mn-Nb-Cu-B low carbon bainitic steel under different conditions was investigated on a Gleeble 1500 thermo-mechanical simulator by stress relaxation method.The precipitation kinetics curves were measured at different strain and strain rates.At the same time,the parameter of the precipitation kinetics equation was determined based on experimental results and the starting time of precipitation was calculated,respectively.Results indicate that calculation data by model agree with experimental data at the higher holding temperature.The research is helpful for optimization of hot deformation process.
参考文献
| [1] | Liu W J;Jonas J J .A stress relaxation method for following carbonitride precipitation in austenite at hot working temperatures[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1988,19(06):1403-1413. |
| [2] | Dutta B;Sallars C M .Effect of composition and process variables on Nb(C,N) precipitation in niobium microalloyed austenite[J].Materials Science and Technology,1987,3(03):197-205. |
| [3] | P. Korczak;H. Dyja .Investigation of microstructure prediction during experimental thermo-mechanical plate rolling[J].Journal of Materials Processing Technology,2001(1/2):112-119. |
| [4] | Hodgson P D;Gibbs R K .A mathematical model to predict the mechanical properties of hot rolled C-Mn and microalloyed steels[J].ISIJ International,1992,32(12):1329-1338. |
| [5] | Kliber J;Schindler I .Recrystallization/precipitation behaviour in microalloyed steels[J].Journal of Materials Processing Technology,1996,60:597-602. |
| [6] | 王昭东,曲锦波,刘相华,王国栋.松弛法研究微合金钢碳氮化物的应变诱导析出行为[J].金属学报,2000(06):618-621. |
| [7] | 董洪波,康永林.应力松弛法研究低碳贝氏体钢的静态软化行为[J].材料热处理学报,2011(03):103-106. |
| [8] | 杨善武;贺信莱;陈梦谪 等.铌硼微合金钢高温应变诱导析出行为[J].材料科学与工程,1994,12(02):49-53. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%