CN106747465B - 一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料及制备方法 - Google Patents

一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料及制备方法 Download PDF

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CN106747465B
CN106747465B CN201710105749.6A CN201710105749A CN106747465B CN 106747465 B CN106747465 B CN 106747465B CN 201710105749 A CN201710105749 A CN 201710105749A CN 106747465 B CN106747465 B CN 106747465B
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宋金鹏
高姣姣
安晶
梁国星
姜龙凯
高杰
王时英
吕明
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Abstract

本发明涉及颗粒弥散增韧陶瓷刀具材料领域，具体为一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料及制备方法，解决现有TiN基陶瓷材料复合时存在力学性能降低、工艺复杂且不利于产业化的问题。一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料，是由如下质量百分比的原料组成：TiN 67%‑83%，HfC 10%‑25%，Ni 2%‑6%，Mo 2%‑8%。本发明在保持材料硬度的基础上，提高了材料的抗弯强度和力学性能，制备出HfC颗粒弥散增韧补强TiN基陶瓷刀具材料，而且利用真空热压烧结法，工艺简化，成本低，利于产业化生产。

Description

一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料及制备方法
技术领域
本发明涉及颗粒弥散增韧陶瓷刀具材料领域，具体为一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料及制备方法。
背景技术
TiN是一种具有高强度、高硬度、耐高温、耐酸碱、耐磨损的特点，同时具有良好的导电和导热性能，其在高温结构材料、耐磨、耐腐蚀以及在材料领域中有着广泛的应用前景。但是陶瓷刀具其固有的脆性从某种程度上限制了其应用，如何提高其韧性和强度是目前陶瓷材料领域研究的一个热点和难点。通过向基体中加入添加相采用多元复合的方法可以提高材料的性能，基于此，非常需要一种能够保持材料硬度（18~21GPa）的前提下，提高材料抗弯强度和断裂韧度的特性的TiN基陶瓷材料复合技术。
另外传统制备工艺存在制备设备与工艺复杂，成本高，不利于产业化等不足之处。因此这种新的TiN基陶瓷材料复合技术还应该同时具备制备工艺简单，成本低，有利于产业化的特点。
发明内容
本发明为了解决现有TiN基陶瓷材料复合时存在力学性能降低、工艺复杂且不利于产业化的问题，提供了一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料及制备方法。
本发明是采用如下技术方案实现的：一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料，是由如下质量百分比的原料组成：TiN 67%-83%，HfC 10%-25%，Ni 2%-6%，Mo 2%-8%。
采用上述组分制得的HfC颗粒弥散增韧补强TiN基陶瓷刀具材料的纯度高，HfC晶粒分布均匀,其平均尺寸为1μm，TiN晶粒的尺寸介于5μm-10μm，TiN基材料的硬度介于18.32~20.15GPa，克服了现有的TiN基陶瓷材料复合时存在力学性能降低的问题。
一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料的制备方法，采用如下步骤：a、将各原料的混合粉末装入卧式罐磨球磨机中，用硬质合金球球磨后过筛；b、将过筛后的原料装入上下封闭的石墨容器，再放入高温烧结炉内；c、在升温速率10℃/min、压力25MPa、烧结温度1600℃-1700℃的条件下，保温时间20min-40min，得到的HfC颗粒弥散增韧补强TiN基陶瓷刀具材料。
本发明采用真空热压烧结制备工艺制备的TiN基陶瓷材料的性能优异，抗弯强度介于930.48~1210.22MPa和断裂韧度介于6.85~8.12 MPa·m½，提高了氮化钛陶瓷刀具材料的切削性能。
本发明采用真空热压烧结法，在合适的升温速率、压力、生长温度和保温时间下，合成HfC颗粒弥散增韧补强TiN基陶瓷刀具材料，克服了现有TiN基陶瓷材料复合时存在工艺复杂且不利于产业化的问题。
本发明在保持材料复合后断裂韧度和抗弯强度提高的基础上，保证了材料的高硬度特性，而且利用真空热压烧结法，工艺简化，成本低，利于产业化生产，适合于切削加工高硬度的材料。
附图说明
图1为本发明的扫描电镜图。
由图可见，约为1μm的HfC颗粒均匀的分布在TiN基体中，其有利于提高材料的抗弯强度和断裂韧度。
具体实施方式
实施例1
一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料，是由如下质量百分比的原料组成：TiN 67%，HfC 25%，Ni 6%，Mo 2%。
一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料的制备方法，采用如下步骤：a、将各原料的混合粉末装入卧式罐磨球磨机中，用硬质合金球球磨后过筛；b、将过筛后的原料装入上下封闭的石墨容器，再放入高温烧结炉内；c、 在升温速率10℃/min、压力25MPa、烧结温度1600℃的条件下，保温时间20min，得到的HfC颗粒弥散增韧补强TiN基陶瓷刀具材料。
实施例2
一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料，是由如下质量百分比的原料组成：TiN 75%，HfC 15%，Ni 2%，Mo 8%。
一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料的制备方法，采用如下步骤：a、将各原料的混合粉末装入卧式罐磨球磨机中，用硬质合金球球磨后过筛；b、将过筛后的原料装入上下封闭的石墨容器，再放入高温烧结炉内；c、在升温速率10℃/min、压力25MPa、烧结温度1650℃的条件下，保温时间30min，得到的HfC颗粒弥散增韧补强TiN基陶瓷刀具材料。
实施例3
一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料，是由如下质量百分比的原料组成：TiN 83%，HfC 10%，Ni 4%，Mo 3%。
一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料的制备方法，采用如下步骤：a、将各原料的混合粉末装入卧式罐磨球磨机中，用硬质合金球球磨后过筛；b、将过筛后的原料装入上下封闭的石墨容器，再放入高温烧结炉内；c、在升温速率10℃/min、压力25MPa、烧结温度1700℃的条件下，保温时间40min，得到的HfC颗粒弥散增韧补强TiN基陶瓷刀具材料。

Claims (1)

1.一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料的制备方法，所述HfC颗粒弥散增韧补强TiN基陶瓷刀具材料是由如下质量百分比的原料组成：TiN 67%-83%，HfC 10%-25%，Ni2%-6%，Mo 2%-8%，HfC晶粒分布均匀，其平均尺寸为1μm，TiN晶粒的尺寸介于5μm-10μm，1μm的HfC颗粒均匀的分布在TiN基体中；
其特征在于：所述方法采用如下步骤：a、将各原料的混合粉末装入卧式罐磨球磨机中，用硬质合金球球磨后过筛；b、将过筛后的原料装入上下封闭的石墨容器，再放入高温烧结炉内；c、 在升温速率10℃/min、压力25MPa、烧结温度1600℃-1700℃的条件下，保温时间20min-40min，得到的HfC颗粒弥散增韧补强TiN基陶瓷刀具材料。
CN201710105749.6A 2017-02-27 2017-02-27 一种HfC颗粒弥散增韧补强TiN基陶瓷刀具材料及制备方法 Expired - Fee Related CN106747465B (zh)

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