Study of High Temperature Deformation and Recrystallization in W9Mo3Cr4V Steel

The behavior of high temperature deformation and recrystallization of W9Mo3Cr4V steel have been studied in this paper. Dynamic precipitation during deformation has also been investigated. In W9Mo3Cr4V steel, stress strain curves exhibit many features. The deformation structures and the effects of deformation parameters on dynamic recrystallization are more complicated than those in low alloy steels. For W9Mo3Cr4V steel, there is a large number of residual carbides on the matrix at high temperature. Also, many second carbides precipitate from the matrix during high temperature deformation. These two kinds of carbides (especially the latter) make the behavior of deformation and dynamic recrystallization in W9Mo3Cr4V steel different from those in low alloy steels. ABSTRACT:The behavior of high temperature deformation and recrystallization of W9Mo3Cr4V steel have been studied in this paper. Dynamic precipitation during deformation has also been investigated. In W9Mo3Cr4V steel, stress strain curves exhibit many features. The deformation structures and the effects of deformation parameters on dynamic recrystallization are more complicated than those in low alloy steels. For W9Mo3Cr4V steel, there is a large number of residual carbides on the matrix at high temperature. Also, many second carbides precipitate from the matrix during high temperature deformation. These two kinds of carbides (especially the latter) make the behavior of deformation and dynamic recrystallization in W9Mo3Cr4V steel different from those in low alloy steels.

W9Mo3Cr4V钢高温形变与再结晶组织

研究了W9Mo3Cr4V钢高温形变再结晶的各种组织特征。因残留碳化物和动态析出的影响,W9Mo3Cr4V钢高温形变再结晶组织特征与低碳低合金钢对应组织有本质不同。

W9Mo3Cr4V钢的超细化处理

采用不同的工艺参数，对Ｗ９Ｍｏ３Ｃｒ４Ｖ钢进行高温变形，获得了一种超细的再结晶组织。进一步分析了产生这种超细组织的原因和条件，为高合金钢的超细化处理提出了一种有效的方法。

Effect of Morphology for Novel Bainite/Martensite Dual-Phase High Strength Steel on Its Hydrogen Embrittlement Susceptibility

With TEM、SEM, various high temperature deformed structures in W9Mo3Cr4V steel were investigated. The sub structures,recrystallized nuclei, as well as the dynamic precipitation were also studied and analyzed. The relationship between recrystallized structures and dynamic precipitation was discussed. The results showed that the deformed structures in W9Mo3Cr4V steel are more complicated than those in low alloy steels. Because W9Mo3Cr4V steel is a high speed steel, there are a large number of residual carbides on the matrix. Also, much dynamic precipitating carbides will precipitate during deformation at high temperature.

W9Mo3Cr4V高速钢激光回火的研究

用正交试验优选出Ｗ９Ｍｏ３Ｃｒ４Ｖ高速钢最佳激光回火工艺参数。研究表明：高速钢的激光淬火硬度和二次硬化峰显著高于常规淬火者。

W9Mo3Cr4V钢高温形变再结晶规律

本文研究了Ｗ９Ｍｏ３Ｃｒ４Ｖ钢高温形变再结晶规律，分析讨论了各热变形参敌对再结晶的影响。Ｗ９Ｍｏ３Ｃｒ４Ｖ钢作为一种高速钢，高温变形时不仅残留有大量碳化物，而且在形变过程中伴随有大量碳化物析出。因此，其再结晶行为比碳钢要复杂得多，热变形多数不仅直接影响到再结晶而且通过析出影响再结晶。

W9Mo3Cr4V钢高温形变组织及动态再结晶方式(英文)

W9Mo3Cr4V钢为高速钢，高温形变时，基体中存在大量的残余碳化物，特别是形变过程中析出的大量细小、弥散分布的碳化物导致该钢形变组织及动态再结晶方式远较低碳低合金钢复杂。

高速钢中的静态再结晶

以Ｗ９Ｍｏ３Ｃｒ４Ｖ钢为对象，研究了其静态再结晶规律及各变形参数对静态再结晶的影响．

高速钢一次回火工艺的研究

各种高速钢的热处理传统工艺通常需要三次回火,本文讨论用正交试验法改革W9Mo3Cr4V和W18Cr4V钢机用锯条的传统热处理工艺,试验结果充分表明,一次回火完全可以代替三次回火,用一次回火处理的机用锯条,其使用寿命比用三次处理的更高。

激光硬化和渗氮复合处理W9Mo3Cr4V高速钢组织与性能

采用激光硬化与渗氮复合表面改性技术,对W9Mo3Cr4V高速钢表面进行了强化处理。利用X射线衍射仪、扫描电子显微镜、电子探针、显微硬度计和摩擦磨损试验机,分别对复合处理试样的相组成、微观组织、成分、显微硬度和耐磨性进行了分析。研究结果表明,复合处理表面改性层主要是回火马氏体、残余奥氏体、Fe3N、Cr7C3、M2C型碳化物所构成。由于激光硬化的晶粒细化作用,以及大量位错、孪晶、空位等微观缺陷的产生,致使氮化层的深度得到明显提高。与单一的激光硬化和渗氮工艺相比,复合处理工艺有效地提高了高速钢的硬度和耐磨性能。