Scholarlink

<p>This paper carried out a comparative study on the creep-feed grinding temperature of wrought alloy GH4169, directionally solidified cast alloy DZ408 and single-crystal nickel-based alloy DD6 with both brown corundum wheel (BCW) and microcrystalline corundum wheel (MCW). The results were as follows: (1) The grinding temperatures varied significantly with different combinations of grinding depth, workpiece feed rate and grinding speed, and three typical levels of temperature (i.e., &lt; 135 ℃, 380–410 ℃, and &gt; 900 ℃) were determined accordingly. The magnitude of temperature variation under different grinding conditions indicates that grinding depth exerts the greatest influence on temperature. In particular, grinding DD6 with MCW permitted the largest material removal rate (MRR) of 3.5 mm<sup>3</sup>/(mm·s). (2) At grinding temperatures of 380–410 ℃, the GH4169 grinding chips showed the long and continuous sawtooth-like banded morphology; the DZ408 grinding chips presented short stripe-like structures due to the chip shear slip behavior; while the DD6 grinding chips exhibited the uniform sawtooth-like morphology with a thickness of 6&#xa0;μm and a width of 10&#xa0;μm. (3) Examination of the tool surface revealed that, regardless of temperature, grinding GH4169 and DZ408 primarily resulted in workpiece material adhesion. In contrast, grinding DD6 led to severe chip clogging. (4) The temperature level of &lt; 135&#xa0;°C can produce the defect-free workpiece surface; However, when it was &gt; 900&#xa0;°C, the material bulging, deep grooves and even subsurface micro-cracks became the main surface defects, under which the surface roughness Ra can reach 1.20&#xa0;μm (DZ408 with BCW). (5) Grinding DZ408 with MCW had the highest work hardening level of 25.2% due to workpiece material plastic deformation when the temperature was &lt; 135 ℃.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Creep-feed grinding of different nickel-based superalloys: grinding temperature, and its effect on material removal behavior, tool surface state and surface integrity

  • 期刊论文

  • 发表日期：

    2025年11月21日

查看全文
  • Yang Xu,
  • Qing Miao,
  • Wenfeng Ding,
  • Zhen Yin,
  • Chenwei Dai,
  • Ming Zhang

摘要

This paper carried out a comparative study on the creep-feed grinding temperature of wrought alloy GH4169, directionally solidified cast alloy DZ408 and single-crystal nickel-based alloy DD6 with both brown corundum wheel (BCW) and microcrystalline corundum wheel (MCW). The results were as follows: (1) The grinding temperatures varied significantly with different combinations of grinding depth, workpiece feed rate and grinding speed, and three typical levels of temperature (i.e., < 135 ℃, 380–410 ℃, and > 900 ℃) were determined accordingly. The magnitude of temperature variation under different grinding conditions indicates that grinding depth exerts the greatest influence on temperature. In particular, grinding DD6 with MCW permitted the largest material removal rate (MRR) of 3.5 mm3/(mm·s). (2) At grinding temperatures of 380–410 ℃, the GH4169 grinding chips showed the long and continuous sawtooth-like banded morphology; the DZ408 grinding chips presented short stripe-like structures due to the chip shear slip behavior; while the DD6 grinding chips exhibited the uniform sawtooth-like morphology with a thickness of 6 μm and a width of 10 μm. (3) Examination of the tool surface revealed that, regardless of temperature, grinding GH4169 and DZ408 primarily resulted in workpiece material adhesion. In contrast, grinding DD6 led to severe chip clogging. (4) The temperature level of < 135 °C can produce the defect-free workpiece surface; However, when it was > 900 °C, the material bulging, deep grooves and even subsurface micro-cracks became the main surface defects, under which the surface roughness Ra can reach 1.20 μm (DZ408 with BCW). (5) Grinding DZ408 with MCW had the highest work hardening level of 25.2% due to workpiece material plastic deformation when the temperature was < 135 ℃.