Transactions of Materials and Heat Treatment

Title：Research on refinement of heat treatment for improving hardness of 17-4PH (0Cr17Ni4Cu4Nb) forgings

Authors： Zhan Lishui Liu Cheng Ye Junqing Li Yanying Li Rudong Wang Jian

Unit：

KeyWords：

ClassificationCode：TG156

year,vol(issue):pagenumber：2021,46(9):212-215

Abstract：

By understanding the raw material characteristics of 17-4PH (0Cr17Ni4Cu4Nb) martensitic precipitation hardening stainless steel, it was found that the hardness value of the stainless steel is extremely unstable due to the heat treatment system, and it could not complete full transformation of martensite only by taking soild solution and aging treatment. In order to improve the unstability of forgings hardness value for this material, the law of different heat treatment systems affecting the hardness value of forgings was explored by adjusting the tempering temperature and cooling method. In order to reduce the impact on the mechanical properties caused by the original state of 17-4PH(0Cr17Ni4Cu4Nb) steel, an intermediate heat treatment was also attempted to be added between quenching and tempering processes to eilminate the original poor structures, homogenize the alloy elements and refine the austenite grain. The best improvement method for the heat treatment process of 17-4PH(0Cr17Ni4Cu4Nb) steel was found by in-depth analysis of the precipitation hardening principle for 17-4PH(0Cr17Ni4Cu4Nb) steel, that is, after quenching at 1040 ℃ and air cooling, then after tempering at 580 ℃ and air cooling,the hardness value of forgings can reach the requirement of 33-38 HRC.

Funds：

占立水（1982-），男，学士，高级工程师 E-mail：zhanlishui1005@163.com

Reference：

[1]干勇，田志凌.中国材料工程大典:第3卷钢铁材料工程.下[M].北京：化学工业出版社，2005.

Gan Y,Tian Z L.China Materials Engineering Canon：Vol.3 Steel Material Engineering[M]. Beijing：Chemical industrypress,2005．

[2]陆世英，张廷凯，杨长强,等.不锈钢[M].北京：原子能出版社，1998.

Lu S Y,Zhang T K，Yang C Q,et al.Stainless Steel[M].Beijing:Rtomic Energy Press,1998.

[3]张敏，褚巧玲.17-4PH不锈钢热处理工艺[J].金属热处理，2012，37（9）：8-11.

Zhang M,Chu Q L.Heat treatment of 17-4PH stainless steel[J].Heat Treatment of Metals,2012,37(9):8-11.

[4]GJB 5040—2001,航空用钢锻件规范[S].

GJB 5040—2001，Specification for steel forgings for aviation[S].

[5]HB 5024—1989,航空用钢锻件[S].

HB 5024—1989，Steel forgings for aviation[S].

[6]Li P, Cai Q Z, Wei B K. Effect of aging temperature on erosion-corrosion behavior of 17-4PH stainless steels in dilute sulphuric acid slurry [J]. Journal of Iron and Steel Research International,2006,13（5）：73-78.

[7]钟平，刘建华，于刚，等.时效对0Cr15Ni5Cu2Ti钢组织与性能的影响[J].材料热处理学报，2006，27（1）：58-62.

Zhong P,Liu J H,Yu G,et al.Effect of aging on structure and properties of 0Cr15Ni5Cu2Ti steel [J].Transactions of Materials and Heat Treatment，2006,27(1):58-62.

[8]赵莉萍，杨慧，李慧琴.固溶处理和时效对17-4PH沉淀硬化不锈钢组织性能的影响[J].特殊钢，2003，24（4）：24-25.

Zhao L P,Yang H,Li H Q.Effect of solid solution and aging on structure and properties of 17-4PH precipitation-Hardening stainless steel[J].Spbcial Steel,2003,24(4):24-25.

[9]Raj S V, Ghosn L J, Lerch B A, et al. Mechanical properties of 17-4PH stainless steel foam panels [J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2007,456（1-2）：305-316.

[10]陈国辉，张小聪，刘江文，等.调整处理对沉淀硬化不锈钢组织和性能的影响[J].热加工工艺，2010,39（12）：152-154.

Chen G H,Zhang X C,Liu J W,et al.Effcet of adjusting treatment on microstructure and properties of precipitation-hardening stainless steel[J].Hot Working Tcehnology,2010,39(12):152-154.

[11]陈国辉，张小聪，罗承萍，等.沉淀硬化不锈钢PH15-7Mo的时效行为[J].金属热处理，2010, 35（7）：54-57.

Chen G H,Zhang X C,Luo C P,et al.Aging behavior of PH15-7Mo precipitation-hardening stainless steel[J].Heat Treatment of Metals,2010,35(7):54-57.

[12]Hsiao C N, Chiou C S, Yang J R. Aging reactions in a 17-4PH stainless steel [J]. Materials Chemisty and Physics,2002,74（2）：134-142.

[13]赵义，郭亚欢，侯凯. 热处理工艺对17-4PH不锈钢力学性能的影响[J].机械工程材料，2009,33（5）：3-7.

Zhao Y,Guo Y H,Hou K.Effect of heat treatment processes on mechanical properties of 17-4PH stainless steel[J].Materials For Mechanical Engineering,2009,33(5):3-7.

[14]赵义，王福. 热处理工艺对17-4PH钢低温冲击性能的影响[J].金属热处理，2011,36（4）：21-24.

Zhao Y,Wang F.Effect of heat treatments on low temperature impact property of 17-4PH steel[J]. Heat Treatment of Metals,2011,36(4):21-24.

Service：

【This site has not yet opened Download Service】【Add Favorite】