研究了超塑处理对喷射成形GCCr5钢超塑性的影响.超塑性拉伸实验结果表明.未经超塑处理的铸态试样.延伸率为119%;经过二次油淬和二次油淬+高温回火超塑处理的两种试样,延伸率分别为328%和671%.变形温度和应变速率对GCr15钢的超塑性有一定的影响.但材料的微观组织对其超塑性具有决定性作用.超塑处理改变了材料试样的微观组织.导致其超塑性发生变化经过二次油淬+高温回火超塑处理后试样具有球化组织.其超塑性最好.未经超塑处理的铸态试样具有珠光体组织.超塑性最差:经过二次油淬超塑处理后试样的组织是马氏体和少量碳化物的混合.其超塑性介于上述两种试样之间喷射成形工艺使GCr15钢获得均匀细化的稳定组织.这对于细晶超塑性是必要的.超塑处理使材料的超塑性得到更大的提高
参考文献
| [1] | O.D.Sherby, Conrad. M.Young, Bruno. Cady. Walser, Eldon. M.Jr., Superplastic UHCSS, U.S.Patent.3,951,697,20(1976) |
| [2] | C.K.Syn, D.R.Lesuer, O.D.Sherby, Fluence of microstructure on tensile properties of spheroidized ultrahigh carbon (1.8 pct c) Steel, Metallurgical and materials transactions A, 25A, 1481(1994) |
| [3] | T.R.Mcnelley, M.R.Edwards, A.Doig, D.H.Boone, C.W.Schultz, The effect of prior heat treatment on the structure and properties of warm-rolled AISI 52100 steel, Metallurgical Transaction A, 14A, 1427(1983) |
| [4] | Fanju Meng, Kohsuke Tagashira, and Hideaki Sohma, Wear resistance and microstructure of cryogenic treated Fe-I.4Cr-IC Bearing steel, Scripta Metallurgica et Materialia, 131(7), 865(1994) |
| [5] | E.Sato. S.Furimoto, T.Furuhara, K.Tsuzaki, T.Maki, Microstructure control for superplasticity of an ultra high carbon steel, Materials Science Forum, 304～306, 133(1999) |
| [6] | W.J.Kim, E.M.Taleff, O.D.Sherby, Superplasticity of fine-grained Fe-C alloys prepared by ingot and powder-processing routes, Journal of materials science, 33, 4977(1998) |
| [7] | M.F.Ashby, A.R.Verrall, Diffusion accommodated flow and superplasticity, Acta Metall., 21, 149(1973) |
| [8] | G.RaL Nicholas J.Grant, Observation of grain boundary sliding during superplastic deformation, Metallurgical Transactions A, 14A(6), 1451(1983) |
| [9] | T.Watanabe, H.Fuji, H.Oikawa, K.I.Arai, Grain Boundaries in Rapidly Solidified and Annealed Fe-6.5 mass% Si Polycrystalline Ribbons with High Ductility, Acta Metall., 37, 941(1989) |
| [10] | .T.Watanabe, Toughening of Brittle Materials by Grain Boundary Design and Control, Mater Sci Forum,126～128, 295(1993) |
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