研究了新型高CoNi超高强度合金钢的组织和性能.在最佳热处理条件下,达到最佳强韧性,σb≥1960 MPa,σ0 2≥1740 MPa,断裂韧性K1c≥112 MPa.m1/2,其组织为典型的淬火回火板条马氏体,等温回火处理产生二次硬化反应,析出与基体共格的细小弥散合金碳化物M2C沉淀使其得到强化.析出相与基体间的共格关系随回火温度的升高而失去,并转化为M23C6或M7C3.分布在晶界的膜状奥氏体有韧化作用在较高温度下回火,M2C粗化、失去与基体间的共格关系,并向其它碳化物转化,以及在晶内形成大量奥氏体,使性能下降.
参考文献
| [1] | V.K.Chandhok,J.P.Hirch,E.J.Dulis,Trans.ASM,56,677(1963) |
| [2] | D.J.Dyson,S.R.Keown,D.Raynor,J.A.Whiteman,Acta Metall.,14,867(1966) |
| [3] | G.B.Olson,Innovations in Ultrahigh Strength Steel Technology Proc.34th Sagamore Army Material Research Conf.,edited by G.B.Olson (U.S.Army Materials Technology,Watertown,MA,1990) p.3 |
| [4] | P.M.Machmeier,C.D.Little,M.H.Horowitz,R.P.Oates,Met.Technol.,6(8),291(1979) |
| [5] | R.Ayer,P.M.Mechmeier,Metall.& Mater.Tran.A,27A(9),2510(1996) |
| [6] | R.Ayer,P.M.Mechmeier,Metall.& Mater.Trans.A,24A,1943(1993) |
| [7] | R.Ayer,P.M.Mechmeier,Metall.& Mater.Trans.A,29A,903(1998) |
| [8] | C.D.Little,P.M.Mechmeier,High strength fracture resistant weldable steels,U.S Patent,4,076,525(1978) |
| [9] | GU Tian(古田),JIN Jianjun(金建军),J.of Materials Engineer(材料工程),10,18(1994) |
| [10] | J.J.Irani,R.W.K.Honeycombe,J.Iron Steel Inst.,203(8),826(1965) |
| [11] | HU Zhengfei,WU Xingfang,WANG Chunxu,LI Xiuqiu,ACTA Metall.Sin.(金学报),37(4),381(2001) |
| [12] | D.Raynor,J.A.Whiteman,R.W.K.Honeycombe,J.Iron Steel Inst.,2,349(1966) |
| [13] | K.C.King,P.W.Voorhees,G.B.Olson,T.Mura,Metall.Trans.,22A(10),2199(1991) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%