对模壁润滑温压工艺进行了较为系统的研究,分析了温度、粉末中润滑剂添加量、模壁润滑剂种类及其浓度等对温压效果的影响.结果表明,粉末温度在100℃时温压效果最好;Fe-1.5Cu-0.5C粉末中添入0.2%内润滑剂时效果最好,而Fe-1.5Ni-0.5Mo-0.5Cu-0.5C粉末中最佳润滑剂含量为0.3%;模壁润滑剂A、B分别适合于较低和较高压制压力条件,2种模壁润滑剂均在浓度低时温压效果较好;在686MPa时,Fe-1.5Cu-0.5C和Fe-1.5Ni-0.5Mo0.5Cu 0.5C粉末分别获得了7.48、7.39g/cm3的压坯密度;模壁润滑温压工艺较适用于压缩性良好的粉末,对压缩性较差的粉末没有优势;模壁润滑工艺的脱模压力比内润滑工艺小35%～45%,可以减少模具损耗.
参考文献
| [1] | RutzHG;Hanejko F G.High density processing of high performance ferrous materials[A].,1994:117. |
| [2] | RutzHG;Hanejko F G;Luk S H .Warm compaction of fers high density at low cost[J].Metal Powder Report,1994,49(09):40. |
| [3] | Lothar Albano-Müller.新千年初的欧洲粉末冶金[J].粉末冶金工业,2001(02):7-13. |
| [4] | J. M. Capus .Die wall lubrication aids higher density[J].Metal Powder Report,1998(9):28-0. |
| [5] | CAO Shun-hua,HUANG Bai-yun,QU Xuan-hui.Densification Mechanism of Warm Compaction and Powder Mixture Designing Rules[J].中南工业大学学报,2000(01):4. |
| [6] | TtudelY;Gagne M.Compaction behavior of high compressibility low alloy steel powders[M].Advances in Powder Metallurgy · Particulate Materials,1989:63. |
| [7] | Chagnon F;Olschewski G;St-Laurent S.Effects of product and process parameters on dimensional stability of sinter hardened materials[A].Nice,2001 |
| [8] | Chagnon F;Grgne M.Dimensional control of sinter hardened P/M components[A].New Orlleans,2001 |
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