通过在AOD冶炼的热轧(直径65 mm)圆管022Cr25Ni7Mo4N钢坯上切取试样,研究不同的热穿孔和冷加工工艺参数对钢中两相(铁素体和奥氏体)的比例、σ相析出和溶解特点及对钢性能的影响.结果表明:σ相析出的敏感温度区为850～900℃,σ相完全溶解温度为1 010℃.结合热穿孔的特点,圆管坯热穿孔的加热温度为1080～1180℃.为避免加热过程中产生裂纹的可能,在σ相析出的温度区内,应避免重复加热或长时间保温.采用合适的热穿孔和冷加工工艺后,无缝钢管成品满足相关标准的要求.
Samples were taken from φ65 mm round tube blank of 022Cr25Ni7Mo4N after AOD and hot rolling.Tests were made with different parameters of hot piercing and cold working to find relationship among them and the ratio of two phases,characteristics of precipitation and dissolution of σ phase and the properties.The results show that σ phase precipitates at 850-900 ℃.Complete dissolution temperature of σ phase is 1 010 ℃.Combining with characteristics of hot piercing,the heating temperature should be 1080-1180 ℃.Repeated heating and long time heating in precipitate temperature range of σ phase should be avoided to eliminate crack during heating.With suitable parameters of hot piercing and cold working,seamless tubes can meet requirements of relevant standards.
参考文献
| [1] | 陈嘉砚;杨卓越;杨武;苏杰;罗丰华.双相不锈钢中σ相的形成特点及其对性能的影响[J].钢铁研究学报,2006(8):1-4. |
| [2] | 吴忠忠;宋志刚;郑文杰;陈斌.固溶温度对00Cr25Ni7Mo4N超级双相不锈钢显微组织及耐点蚀性能的影响[J].金属热处理,2007(8):50-54. |
| [3] | J.M. Pardal;S.S.M. Tavares;M. Cindra Fonseca.Influence of the grain size on deleterious phase precipitation in superduplex stainless steel UNS S32750[J].Materials Characterization,20093(3):165-172. |
| [4] | 吴忠忠;宋志刚;郑文杰;陈斌;陆建生.固溶温度对超级双相不锈钢00Cr25Ni7Mo4N组织和性能的影响[J].特殊钢,2006(4):11-13. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%