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通过Gleeble-1500D热模拟试验机对0～0.034%Ce的超级双相不锈钢00Cr25Ni7Mo4N(%:0.016～0.020C、24.50～24.72Cr、7.06～7.18Ni、3.61～3.73Mo、0.26～0.27N)进行了950～1 200℃、应变速率5×10-3s-1的热拉伸和变形量60%、应变速率1×10~0s~(-1)的热压缩试验。结果表明,适量铈的加入能提高00Cr25Ni7Mo4N钢的热塑性,铈含量为0.012%时有最好的热塑性;铈含量为0.021%以上时,该钢的峰值应力低于未加稀土钢;铈的加入有助于钢提前达到稳态流变阶段。
The super duplex stainless steel 00Cr25Ni7Mo4N (%: 0.016 ~ 0.020C, 24.50 ~ 24.72Cr, 7.06 ~ 7.18Ni, 3.61 ~ 3.73Mo, 0.26 ~ 0.27N) with 0 ~ 0.034% Ce was tested by Gleeble-1500D thermal simulation tester 950 ~ 1200 ℃, the thermal strain of 5 × 10-3s-1 and the thermal deformation of 60% and the strain rate of 1 × 10 ~ 0s ~ (-1). The results show that the addition of proper amount of cerium can improve the thermoplasticity of 00Cr25Ni7Mo4N steel, and the best thermoplasticity is obtained when the content of cerium is 0.012%. When the content of cerium is more than 0.021%, the peak stress of steel is lower than that of non-added rare earth steel. Help the steel reach steady state rheological stage in advance.