During the forging process of OCr17Ni4Cu4Nb steels, cracks usually appear on the forging surface, resulting in the low percentage of qualified forgings.The inspection and analysis on typical defects by OM and SEM show that the segregation of Nb and Cu alloying elements of raw materials is the main cause for the cracking behavior during the forging process.Based on these reasons, measures such as controlling the quality of raw materials by low-magnification OM observation on the original microstructure are regarded as an effective way to lower the possibility of cracks during the forging process.
CAI Mei, ZANG De-chang, LI Xu-ming
. Analysis on Forging Crack of 0Cr17Ni4Cu4Nb Steel[J]. Journal of Shenyang Aerospace University, 2013
, 30(2)
: 66
-73
.
DOI: 10.3969/j.issn.2095-1248.2013.02.015
[1]《中国航空材料手册》编辑委员会.中国航空材料手册[M].北京:中国标准出版社, 2002.
[2]中国机械工程学会塑形工程学会.锻压手册锻造分册[M].北京:机械工业出版社, 2008.
[3]胡伟星, 刘耀华.改善17-4PH不锈钢热塑性和机械性能的途径[J].上海金属, 1993, (6):39-41.
[4]国防科学技术工业委员会.GJB2294-1995航空用不锈钢及耐热钢棒规范[S].1995.
[5]锻件质量分析编写组编著.锻件质量分析[M].北京:机械工业出版社, 1983.
[6]中国锻压协会编著.特种合金及其锻造[M].北京:国防工业出版社, 2009.
[7]臧鑫士.17-4PH不锈钢的化学成分和热加工[J].航空工程与维修, 1995(10):13-15.
[8]杨钢, 王立民, 程世长, 等.17-4PH沉淀硬化不锈钢的成分优化研究[J].机械工程材料, 2009(8):163-166.
