A new type of high thermal shock resistance tool for inhibiting thermal crack

IF 4.2 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-08-30 DOI:10.1016/j.ijrmhm.2024.106861

Limei Wang , Hanlian Liu , Chuanzhen Huang , Xiangyu Wang , Yang Qiao , Xiuli Fu , Jintao Niu

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引用次数: 0

Abstract

Due to the periodic alternation of hot and cold in the cutting process, cutting tools often fail owing to thermal cracks, making it difficult to intermittently cutting materials. Therefore, in order to suppress the initiation of thermal cracks in cutting tools, a new type of high thermal shock resistance oblique gradient cutting tool (marked as TDZ-X) has been fabricated. The material system of the cutting tool is designed by the temperature field model of the cutting tool. The direction angle of TDZ-X is accurately designed based on the thermal crack initiation area of the tool. A new method for studying the thermal fatigue properties of tool materials is proposed, the tool is heated by ultra-fast picosecond laser to simulate the thermal shock in the milling process. The thermal fatigue resistance and the thermal shock resistance of TDZ-X, the gradient tool and the homogeneous tool are compared and studied, the results show those of TDZ-X are best than those of the other two tool materials. Through the design of TDZ-X, the thermal shock resistance of the tool material has been significantly improved, and the effectiveness of inhibiting thermal crack initiation has been verified by cutting experiments, which provides a new method for design and fabrication of discontinuous cutting tools with long tool life and high reliability.

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用于抑制热裂纹的新型高抗热震性工具

由于切削过程中存在周期性的冷热交替，切削工具经常会因为热裂纹而失效，从而难以对材料进行间歇性切削。因此，为了抑制切削工具热裂纹的产生，人们制造了一种新型高抗热震性斜梯度切削工具（标记为 TDZ-X）。切削工具的材料系统是根据切削工具的温度场模型设计的。根据刀具的热裂纹起始区域，精确设计了 TDZ-X 的方向角。提出了一种研究刀具材料热疲劳特性的新方法，即用超快皮秒激光加热刀具，模拟铣削过程中的热冲击。对比研究了 TDZ-X、梯度刀具和均质刀具的抗热疲劳性能和抗热冲击性能，结果表明 TDZ-X 的抗热疲劳性能和抗热冲击性能优于其他两种刀具材料。通过对 TDZ-X 的设计，刀具材料的抗热震性得到了显著提高，并通过切削实验验证了其抑制热裂纹萌生的有效性，为设计和制造刀具寿命长、可靠性高的非连续切削刀具提供了一种新方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

期刊介绍： The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.