正火和淬火温度对30CrMoA钢除砂器大型锻件-40℃冲击韧性的影响

特殊钢 ›› 2013, Vol. 34 ›› Issue (4): 56-58.

正火和淬火温度对30CrMoA钢除砂器大型锻件-40℃冲击韧性的影响

杨新武, 宛农, 周许, 王立新

1武汉工业学院机械工程学院，武汉430023；
2中原特钢股份有限公司，济源459000

收稿日期:2013-02-23 出版日期:2013-08-01 发布日期:2022-09-11
通讯作者: 通讯作者：宛农，博士，教授，武汉工业学院机械工程学院，武汉430023
作者简介:杨新武(1986-)，男，硕士研究生,冶金新材料和热处理。

Effect of Normalizing and Quenching Temperature on -40 ℃ Impact Toughness of Heavy Forging of Steel 30CrMoA for Desander

Yang Xinwu¹, Wan Nong¹, Zhou Xu², Wang Lixin²

1 School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430023;
2 Zhongyuan Special Steel Co Ltd, Jiyuan 459000

Received:2013-02-23 Published:2013-08-01 Online:2022-09-11

摘要/Abstract

摘要： 30CrMoA钢(/%:0.30C、0.21Si、0.53Mn、0.003S、0.005P、0.98Cr、0.22Mo、0.06V)除砂器锻件为外径Φ405～493 mm内径Φ90～167 mm的管状工件,技术条件要求调质后-40℃横向冲击功≥20 J。经常用正火+调质工艺920℃正火(风冷)+880℃正火(风冷)+860℃淬火(空冷+水冷)+630～680℃回火(空冷)后横向Rm715～815 MPa,Rp0.2 545～665 MPa, A 19%～20%,Z 65%～68%,室温A_kc 36～101 J,-40℃ A_kv 11～21 J; 通过Thermo-calc软件计算得出该钢平衡相图及计算的Ac3温度确定优化调质工艺950℃正火(风冷)+820℃淬火(空冷+水冷)+660～670℃回火(空冷),其横向力学性能为R_m685～700 MPa,Rp_0.2 500～525 MPa, A 21%～22%,Z 63%～66%,室温A_kv 65～114 J,-40℃ A_kv 23～28 J,均符合技术条件要求。

Abstract: The forging of steel 30CrMoA (/%: 0. 30C, 0.21 Si, 0. 53Mn, 0. 003S, 0. 005P, 0. 98Cr, 0.22Mo, 0. 06 V) for Desander is a tubular stock with outside diameter Φ405 ~493 mm and inside diameter Φ90 - 167 mm and in specification the transverse impact energy of quenched-tempered steel at -40 °C is ≥20 J. With conventional normalizing + quenching+ tempering process: 920 ℃ normalizing (fan cooling) +880 °C normalizing (fan cooling) +860 ℃ quenching (air cooling + water cooling) +630 ~680 ℃ tempering ( air cooling) the transverse R_m of steel is 715 ~815 MPa, R_p0.2 545 〜665 MPa, A 19% ~20% , Z 65% ~68% , ambient A_kv 36 ~ 101 J and -40 %： A_kv 11 ~21 J； with equilibrium phase diagram calculated by Thermo-calc software and calculated A_c3 value of steel t the optimum normalizing + quenching+ tempering process has been defined that is 950 °C normalizing ( fan cooling) + 820 ℃ quenching (air cooling + water cooling) + 660 ~670 ℃ tempering (air cooling) , and with the optimum process the transverse mechanical properties of steel are R_m 685 〜700 MPa, R_p0.2 500 〜525 MPa, A 21% 〜22% , Z63% 〜66% , ambient A_kv 65 ~ 114 J and -40 °C A_kv 23 〜28 J, all meet the requirement of specification for the steel.

杨新武, 宛农, 周许, 王立新. 正火和淬火温度对30CrMoA钢除砂器大型锻件-40℃冲击韧性的影响[J]. 特殊钢, 2013, 34(4): 56-58.

Yang Xinwu, Wan Nong, Zhou Xu , Wang Lixin. Effect of Normalizing and Quenching Temperature on -40 ℃ Impact Toughness of Heavy Forging of Steel 30CrMoA for Desander[J]. Special Steel, 2013, 34(4): 56-58.