外圆纵向磨削工艺对18CrNiMo7–6钢表面完整性的影响

朱浩阳; 郜伟; 张银霞; 王子乐; 王栋

doi:10.13394/j.cnki.jgszz.2021.0203

外圆纵向磨削工艺对18CrNiMo7–6钢表面完整性的影响

doi: 10.13394/j.cnki.jgszz.2021.0203

郑州大学机械与动力工程学院, 抗疲劳制造技术河南省工程实验室, 郑州 450001

基金项目: 国家自然科学基金（U1804254）

详细信息

作者简介:
朱浩阳：

通讯作者:
张银霞，女，1974年生，博士、副教授、硕士生导师。主要研究方向：抗疲劳制造技术和精密超精密加工技术。E-mail: zhangyinxia@zzu.edu.cn

中图分类号: TG581+.1
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出版历程
- 收稿日期: 2021-11-26
- 修回日期: 2021-12-02
- 录用日期: 2022-04-01
- 刊出日期: 2022-07-13

Effect of cylindrical longitudinal grinding process on surface integrity of 18CrNiMo7–6 steel

School of Mechanical and Power Engineering, Henan Key Engineering Laboratory of Anti-fatigue Manufacturing Technology, Zhengzhou University, Zhengzhou 450001

摘要

摘要: 为了探究工件转速 n_w 、磨削深度 a_p和纵向进给速度 v_f等磨削工艺参数对18CrNiMo7–6钢表面粗糙度和表层残余应力的影响，用端面外圆磨床开展其单因素外圆纵向磨削试验。结果表明：随着n_w的增大，工件表面粗糙度R_a先减小后增大，当n_w为120 r/min时，R_a达到最小值，此时工件表面的残余压应力最大；当n_w大于120 r/min时，工件表面残余应力出现起伏。随着a_p的增大，工件表面粗糙度R_a先减小后增大，工件表面残余拉应力随着磨削深度的增大而增大。随着v_f的增大，工件表面粗糙度 R_a先减小后增大，当v_f为210 mm/min时，R_a值最小；且随v_f的增大，工件表面残余压应力逐渐减小，并最终转变为逐渐增大的残余拉应力。
- 外圆纵向磨削 /
- 磨削工艺 /
- 表面粗糙度 /
- 残余应力 /
- 18CrNiMo7–6钢
Abstract: In order to explore the influence of the grinding process parameters on the surface roughness and surface layer residual stress of 18CrNiMo7–6 steel, the cylindrical longitudinal grinding experiment was carried out by using an end cylindrical grinder. With using the workpiece speed n_w, grinding depth a_p and longitudinal feed speed v_f, the single-factor experimental research is carried out. The research results show that with the increase of n_w, the surface roughness R_a of the workpiece decreases first and then increases. When n_w is 120 r/min, the surface roughness R_a reaches the minimum value, and the surface residual compressive stress value is the largest at this condition, and when n_w is greater than 120 r/min, the surface residual stress exists fluctuation. With the increase of a_p, the surface roughness R_a of the workpiece decreases first and then increases, and the tensile stress influence on the surface layer of the workpiece increases with the increase of the grinding depth. The surface roughness R_a first decreases and then increases with the increase of v_f. When v_f is 210 mm/min, the surface roughness value R_a is the smallest. With the increase of v_f, the residual compressive stress of the surface layer gradually decreases and gradually changes to increasing residual tensile stress.
- cylindrical longitudinal grinding /
- grinding process /
- surface roughness /
- residual stress /
- 18CrNiMo7–6 steel

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图 1 热处理后试样

Figure 1. Sample after heat treatment

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图 2 剖层深度与腐蚀时间关系

Figure 2. Relationship between profile depth and corrosion time

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图 3 工件转速对工件表面粗糙度的影响

Figure 3. Effect of workpiece speed on surface roughness

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图 4 磨削深度对工件表面粗糙度的影响

Figure 4. Effect of grinding depth on surface roughness

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图 5 纵向进给速度对表面粗糙度的影响

Figure 5. Effect of longitudinal feed speed on surface roughness

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图 6 工件原始残余应力

Figure 6. Original residual stress of the workpiece

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图 7 工件转速对工件表面残余应力的影响

Figure 7. Effect of workpiece speed on the residual stress on the surface of the workpiece

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图 8 工件转速对工件表层残余应力的影响

Figure 8. Effect of workpiece speed on the residual stress on the surface of the workpiece

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图 9 磨削深度对工件表面残余应力的影响

Figure 9. Effect of grinding depth on the residual stress on the surface of the workpiece

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图 10 磨削深度对工件表层残余应力的影响

Figure 10. Effect of grinding depth on the residual stress on the surface of the workpiece

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图 11 纵向进给速度对工件表面残余应力的影响

Figure 11. Effect of longitudinal feed speed on the residual stress on the surface of the workpiece

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图 12 纵向进给速度对工件表层残余应力的影响

Figure 12. Effect of longitudinal feed speed on the residual stress on the surface of the workpiece

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表 1 18CrNiMo7–6材料化学成分组成

Table 1. Chemical composition of 18CrNiMo7–6 material

成分质量分数 ω / %

C 0.15～0.21
Si 0.15～0.40
Mn 0.60～0.90
P <0.02
Cr 1.50～1.80
Ni 1.40～1.70
Mo 0.25～0.35
Fe <96.00

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表 2 18CrNiMo7–6钢力学性能

Table 2. Mechanical properties of 18CrNiMo7–6 steel

屈服强度
R_s / (N·mm⁻²) 抗拉强度
R_m / (N·mm⁻²) 延伸率
δ / % 收缩率
ψ / %

1 016 1 220 14 68

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表 3 外圆磨削试验单因素试验参数

Table 3. Single factor test parameters of cylindrical grinding test

条件编号工件转速
n_w / (r·min⁻¹) 磨削深度
a_p / μm 纵向进给速度
v_f / (mm·min⁻¹)

1 80,100,120,140,160 15 120
2 100 10,15,20,25,30 150
3 80 20 120,150,180,210,240

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参考文献(14)

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外圆纵向磨削工艺对18CrNiMo7–6钢表面完整性的影响

doi: 10.13394/j.cnki.jgszz.2021.0203

作者简介:
朱浩阳：

通讯作者:
张银霞，女，1974年生，博士、副教授、硕士生导师。主要研究方向：抗疲劳制造技术和精密超精密加工技术。E-mail: zhangyinxia@zzu.edu.cn

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Effect of cylindrical longitudinal grinding process on surface integrity of 18CrNiMo7–6 steel

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目录

成分	质量分数 ω / %
C	0.15～0.21
Si	0.15～0.40
Mn	0.60～0.90
P	<0.02
Cr	1.50～1.80
Ni	1.40～1.70
Mo	0.25～0.35
Fe	<96.00

屈服强度 R_s / (N·mm⁻²)	抗拉强度 R_m / (N·mm⁻²)	延伸率 δ / %	收缩率 ψ / %
1 016	1 220	14	68

条件编号	工件转速 n_w / (r·min⁻¹)	磨削深度 a_p / μm	纵向进给速度 v_f / (mm·min⁻¹)
1	80,100,120,140,160	15	120
2	100	10,15,20,25,30	150
3	80	20	120,150,180,210,240

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外圆纵向磨削工艺对18CrNiMo7–6钢表面完整性的影响

doi: 10.13394/j.cnki.jgszz.2021.0203

作者简介: 朱浩阳：

通讯作者: 张银霞，女，1974年生，博士、副教授、硕士生导师。主要研究方向：抗疲劳制造技术和精密超精密加工技术。E-mail: zhangyinxia@zzu.edu.cn

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出版历程

Effect of cylindrical longitudinal grinding process on surface integrity of 18CrNiMo7–6 steel

计量

出版历程

目录

作者简介:
朱浩阳：

通讯作者:
张银霞，女，1974年生，博士、副教授、硕士生导师。主要研究方向：抗疲劳制造技术和精密超精密加工技术。E-mail: zhangyinxia@zzu.edu.cn