吴保平,吴剑涛,李俊涛

• 1:钢铁研究总院高温材料研究所
• 2:钢铁研究总院高温合金新材料北京市重点实验室

摘要(Abstract)：

研究了B元素的加入对DZ424定向凝固合金凝固特性和性能的影响规律。结果表明:B元素的加入能显著降低合金的固/液相温度,加宽凝固范围,增加共晶含量;同时,由于B元素在碳化物中富集,使得碳化物形貌由草书状向块状转变。随着B含量的增加,粒状M_3B_2逐渐在共晶前沿析出;进一步增加B含量,硼化物形貌由粒状向条状转变。B的添加能够显著提高合金的持久性能,但当B添加量大于0.015%时,合金的持久性能显著降低。

关键词(KeyWords)： 硼元素;定向凝固;凝固特性;性能;高温合金

Abstract:

Keywords:

基金项目(Foundation): 北京市科技计划项目(Z131100006413005)

作者(Author): 吴保平,吴剑涛,李俊涛

DOI: 10.13289/j.issn.1009-6264.2018-0189

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