...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Surface hardening treatment for C.P. titanium and titanium alloys in use of Ar-5 percent CO gas
【24h】

Surface hardening treatment for C.P. titanium and titanium alloys in use of Ar-5 percent CO gas

机译：C.P.的表面硬化处理含Ar-5％CO气体的钛和钛合金

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Surface hardening of C.P. (commercially pure) titanium and titanium alloys in use of Ar-5 percent CO gas was investigated in the temperature range between 973 K and 1 123K. Titanium materials used were alpha+beta type alloy of Ti-4.5 percentAI-3 percentV-2 percentMo-2 percent Fe (SP-700) and p type alloy of Ti-15 percentV-3 percentCr-3 percentSn-3 percent Al (Ti-15-333). Oxidation accompanied with surface hardening in use of Ar-5 percent CO gas is much reduced compared with that of Ar-20 percentCO_2 gas. Surface hardening was evaluated by both of the maximum surface hardness and hardening layer depth obtained from hardness distribution profiles in the subsurface region. The former is the highest in C.P. titanium and the lowest in Ti-15-333 alloy, and the latter is the deepest in Ti-15-333 alloy and the shallowest in C.P. titanium. Surface hardening in C.P. titanium is caused by solid solution hardening of oxygen and carbon enriched in the subsurface region. Enrichment of these interstitials in the subsurface region of SP-700 or Ti-15-333 alloys causes the increase of a volume fraction in a+/5 two phases or phase transformation from j3 to a+{5 two phases, respectively, and surface hardening is primarily controlled by volume fraction of a phase hardened by interstitials enrichment. The other j3 type titanium alloy of Ti-15 percentMo-5 percentZr-3 percent Al yields much marked surface hardening over Ti-15-333 alloy. All of these results were analyzed and discussed based on oxygen and carbon concentration profiles, which were obtained by EPMA, and were also calculated by uni-dimensional diffusion model.
机译：C.P.的表面硬化在973 K和1 123K之间的温度范围内，研究了使用Ar-5％CO气体的（商业纯）钛和钛合金。使用的钛材料是Ti-4.5％Al-3％V-2％Mo-2％Fe（SP-700）的α+β型合金和Ti-15％V-3％Cr-3％Sn-3％Al（Ti -15-333）。与Ar-20％CO_2气体相比，使用Ar-5％CO气体进行氧化并伴随表面硬化的情况大大减少。通过从表面下区域的硬度分布曲线获得的最大表面硬度和硬化层深度来评价表面硬化。前者是C.P.钛，在Ti-15-333合金中含量最低，后者在Ti-15-333合金中含量最深，在C.P.中最浅。钛。 C.P.中的表面硬化钛是由富集于地下区域的氧气和碳的固溶硬化引起的。这些间隙在SP-700或Ti-15-333合金的亚表面区域中的富集导致a + / 5两相的体积分数增加或分别从j3转变为a + {5两相，并且表面硬化为主要受填隙富集硬化相的体积分数控制。 Ti-15％Mo-5％Zr-3％Al的另一种j3型钛合金比Ti-15-333合金产生明显的表面硬化。所有这些结果都是根据EPMA获得的氧和碳浓度曲线进行分析和讨论的，并且还通过一维扩散模型进行了计算。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号