冷却速率对0Cr11Ni2MoVNb钢冲击韧度和组织的影响
Effect of the Cooling Speed on the Impact Toughness and Microstructure of 0Cr11Ni2MoVNb Steel
摘 要
针对0Cr11Ni2MoVNb钢大型锻件冷却速率慢的特点,研究了不同预冷淬火温度、不同淬火和回火冷却速率对材料冲击韧度和组织的影响.结果表明:随着淬火和回火冷却速率的减慢,材料的冲击韧度下降;为了提高0Cr11Ni2MoVNb钢大型锻件的冲击韧度,可以采用预冷淬火或者淬火和回火同时快冷(冷速约60 ℃/min)的工艺,但预冷淬火温度应不低于900 ℃,否则晶界析出物将增多,沿晶断裂增加,导致冲击韧度明显下降.
冲击韧度
析出物
沿晶断裂
big forge piece
impact toughness
precipitate
intergranular fracture
Abstract
Considering the slow cooling speeds of 0Cr11Ni2MoVNb big forge piece,the effects of different delayed quenching temperatures and different cooling speed of quench and temper on the impact toughness and microstructure were investigated.The impact toughness decreased with decreasing the cooling speed of quench and temper.In order to increase the impact toughness of big forge piece,the best way is to adopt the delayed quenching or fast cooling speed (about 60 ℃/min ) for quench and temper at the same time .However,when the delayed quenching is adopted,the delayed quenching temperature should be higher than 900 ℃;otherwise,the amount of precipitates increases,which leads to more intergranular fracture and decreases the impact toughness.
中图分类号 TG142.73 TG161
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收稿日期 2005/7/18
修改稿日期 2005/9/22
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备注王立民(1971-),男,辽宁鞍山人,工程师,博士.
引用该论文: WANG Li-min,TAI Qing-an,YANG Gang,LIU Zheng-dong,BAO Han-sheng,WANG Chang,CHENG Shi-chang. Effect of the Cooling Speed on the Impact Toughness and Microstructure of 0Cr11Ni2MoVNb Steel[J]. Materials for mechancial engineering, 2006, 30(8): 31～33
王立民,邰青安,杨钢,刘正东,包汉生,王昌,程世长. 冷却速率对0Cr11Ni2MoVNb钢冲击韧度和组织的影响[J]. 机械工程材料, 2006, 30(8): 31～33
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参考文献
【1】王红涛.热强马氏体不锈钢1Cr12Ni3Mo2VA钢最佳热处理工艺的优化研究[J].材料工程,1994,(7):14-17.
【2】刘鹏虎,张而耕,关凯书,等.Cr-Ni奥氏体不锈耐热钢中碳化物、σ相变热力学和转变动力学探讨[J].化工机械,2002,29(2):82-84.
【3】田青超,林良道,陈家光,等.双相321不锈钢管的氧化失效行为[J].机械工程材料,2004,28(2):51-54.
【4】王印培,陈进,孙晓明,等.SUS347不锈钢长期服役后的高温持久强度[J].机械工程材料,2004,28(9):26-28.
【2】刘鹏虎,张而耕,关凯书,等.Cr-Ni奥氏体不锈耐热钢中碳化物、σ相变热力学和转变动力学探讨[J].化工机械,2002,29(2):82-84.
【3】田青超,林良道,陈家光,等.双相321不锈钢管的氧化失效行为[J].机械工程材料,2004,28(2):51-54.
【4】王印培,陈进,孙晓明,等.SUS347不锈钢长期服役后的高温持久强度[J].机械工程材料,2004,28(9):26-28.
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