金属热处理 ›› 2023, Vol. 48 ›› Issue (8): 87-93.DOI: 10.13251/j.issn.0254-6051.2023.08.014

• 工艺研究 • 上一篇    下一篇

贝氏体基高硅高钒高速钢等温淬火制备及组织特点

张志勇1, 石如星1,3, 殷立涛2,3, 庞庆海2,3, 冷婉晴4, 徐流杰4   

  1. 1.中信重工机械股份有限公司, 河南 洛阳 471039;
    2.洛阳中重铸锻有限责任公司, 河南 洛阳 471039;
    3.智能矿山重型装备全国重点实验室, 河南 洛阳 471039;
    4.河南科技大学 金属材料磨损控制与成型技术国家地方联合工程研究中心, 河南 洛阳 471003
  • 收稿日期:2023-03-14 修回日期:2023-06-14 出版日期:2023-08-25 发布日期:2023-10-10
  • 通讯作者: 殷立涛,高级工程师,硕士,E-mail: yinlt@citic-hic.com.cn
  • 作者简介:张志勇(1970—),男,高级工程师,主要研究方向为机械制造工艺,E-mail: lyzx202309@163.com。
  • 基金资助:
    河南省重大科技专项(221100230200)

Austempering preparation of high silicon high vanadium high speed steel with bainite matrix and its microstructure characteristics

Zhang Zhiyong1, Shi Ruxing1,3, Yin Litao2,3, Pang Qinghai2,3, Leng Wanqing4, Xu Liujie4   

  1. 1. CITIC Heavy Industries Co., Ltd., Luoyang Henan 471039, China;
    2. Luoyang CITIC HIC Casting & Forging Co., Ltd., Luoyang Henan 471039, China;
    3. State Key Laboratory of Intelligent Mining Heavy Equipment, Luoyang Henan 471039, China;
    4. National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials, Henan University of Science and Technology, Luoyang Henan 471003, China
  • Received:2023-03-14 Revised:2023-06-14 Online:2023-08-25 Published:2023-10-10

摘要: 采用砂型铸造方法制备高硅高钒高速钢,研究等温淬火温度对高硅高钒高速钢纳米贝氏体组织转变的影响。结果表明,通过提高硅含量至2.14%(质量分数),可以抑制贝氏体铁素体中渗碳体的析出,获得纳米贝氏体基体组织。贝氏体组织随等温淬火温度降低得到细化。等温淬火温度从300 ℃降低到250 ℃,贝氏体铁素体平均厚度降低30%,薄膜状残留奥氏体平均厚度降低27%,而从250 ℃到200 ℃,组织厚度则没有下降。随等温淬火温度降低,贝氏体转化量升高,贝氏体转变时间延长。等温淬火温度由300 ℃降低至250、200 ℃,残留奥氏体含量分别降低了34.7%、60.9%,贝氏体转变时间由300 ℃的84 h延长至200 ℃的96 h以上。

关键词: 高钒高速钢, 高硅, 等温淬火温度, 纳米贝氏体

Abstract: After preparation by sand casting, the effect of austempering temperature on microstructure transformation of nano-bainite in a high silicon and high vanadium high speed steel was studied. The results show that by increasing the silicon content to 2.14%(mass fraction), the precipitation of cementite in bainitic ferrite can be inhibited, and the nano-bainite matrix structure can be obtained. With the decrease of austempering temperature, the bainite structure is refined. When the austempering temperature is decreased from 300 ℃ to 250 ℃, the average thickness of bainitic ferrite and thin film retained austenite decreases by 30% and 27%, respectively. While from 250 ℃ to 200 ℃, the microstructure thicknesses do not decrease. The bainite transformation amount increases and the transformation time is prolonged with the decrease of austempering temperature. The content of retained austenite decreases by 34.7% and 60.9%, respectively, when the austempering temperature decreases from 300 ℃ to 250 ℃ and 200 ℃, and the bainite transformation time increases from 84 h at 300 ℃ to more than 96 h at 200 ℃.

Key words: high vanadium high speed steel, high silicon, austempering temperature, nano-bainite

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