不同材料夹送辊堆焊层退火处理后的组织及性能对比  

Comparison of microstructure and properties of surfacing layer on pinch roller produced by different materials after annealing treatment

作　　者：滕宏胤[1] 王银军[1] 吴索团[1] Teng Hongyin;Wang Yinjun;Wu Suotuan(Meishan Iron&Steel Ltd.,Nanjing Jiangsu 210039,China)

机构地区：[1]梅山钢铁股份有限公司,江苏南京210039

出　　处：《金属热处理》2025年第1期155-162,共8页Heat Treatment of Metals

基　　金：梅山钢铁有限公司项目(RH2200002225)。

摘　　要：为提高夹送辊性能,延长使用寿命,针对现用的Delstain-442焊丝及拟替换的Multipass-249及Multipass-224HC两种焊丝展开研究,对比了3种焊丝制备的堆焊层经不同温度(500℃和540℃)退火处理后的组织和性能变化。结果表明,经退火处理后,3种堆焊层中的残留奥氏体均向马氏体转化,Delstain-442堆焊层组织转化更为充分。540℃退火Multipass-249堆焊层的韧性更好,组织更稳定,有更好的高温耐磨性能。540℃退火Delstain-442堆焊层也能获得更好的高温硬度和高温耐磨性能。Multipass-224HC堆焊层具有较高的脆性,两种温度退火处理后均有良好的耐磨性,磨损率相对Delstain-442降低了一个量级。540℃退火处理Multipass-249堆焊层综合性能较好,但由于冲击韧性存疑,是否可替换Delstain-442还需进一步验证。In order to improve the properties of the pinch roller and extend its service life,the current Delstain-442 welding wire and the proposed Multipass-249 and Multipass-224HC welding wires were studied.The microstructure and properties changes of the surfacing layers prepared by the three types of welding wires after annealing at 500 ℃ and 540 ℃ were compared.The results indicate that after annealing,the retained austenite in the three types of surfacing layers transformed into martensite,and the transformation of the Delstain-442 layer is more complete.The Multipass-249 layer annealed at 540 ℃ has better toughness,more stable microstructure,and better high-temperature wear resistance.The Delstain-442 layer annealed at 540 ℃ can also achieve better high-temperature hardness and high-temperature wear resistance.The Multipass-224HC layer has higher brittleness,while obtains good wear resistance after annealing at both the temperatures,where the wear rate is reduced by one order of magnitude compared to that of the Delstain-442.The comprehensive properties of the Multipass-249 layer annealed at 540 ℃ are good,but due to doubts about its impact toughness,further verification is needed to determine whether it can replace the Delstain-442.

关 键 词：热轧 夹送辊 力学性能 显微组织 耐磨性 

分 类 号：TG172[金属学及工艺—金属表面处理]