Y<sub>2</sub>O<sub>3</sub>对铁基金刚石工具性能的影响

温禄; 周强; 罗莉; 潘锡翔; 吴劲频

doi:10.13394/j.cnki.jgszz.2022.0046

Y₂O₃对铁基金刚石工具性能的影响

doi: 10.13394/j.cnki.jgszz.2022.0046

温禄^{1, 2,},
周强^{1, 2},
罗莉^{1, 2},
潘锡翔^{1, 2},
吴劲频^{1, 2}

1.
国家离子型稀土资源高效开发利用工程技术研究中心, 江西赣州 341000
2.
江西离子型稀土工程技术研究有限公司, 江西赣州 341000

基金项目: 江西赣州市重点研发计划一般项目（202101125021）

详细信息

作者简介:
温禄，男，1992年生，助理工程师。主要研究方向：粉末冶金和金刚石工具。E-mail：wen52lu@163.com

中图分类号: TQ164; TG74
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出版历程
- 收稿日期: 2022-04-14
- 修回日期: 2022-07-05
- 刊出日期: 2022-10-10

Effect of Y₂O₃ on properties of iron-based diamond tools

WEN Lu^{1, 2
,},
ZHOU Qiang^{1, 2},
LUO Li^{1, 2},
PAN Xixiang^{1, 2},
WU Jinpin^{1, 2}

1.
National Engineering Research Center for Ionic Rare Earth, Ganzhou 341000, Jiangxi, China
2.
Jiangxi Ionic Rare Earth Engineering Research Co., Ltd., Ganzhou 341000, Jiangxi, China

摘要

摘要: 采用正交试验方法研究热压压力、烧结温度和Y₂O₃含量等3个因素对铁基胎体硬度、致密度、抗弯强度和断口微观形貌等的影响，并获得较优的烧结工艺参数。在此基础上，制备含Y₂O₃的铁基金刚石工具，并对其断口形貌、耐磨性和锋利度等进行检测及分析。结果表明：含Y₂O₃的铁基结合剂胎体，其相对密度和硬度的影响因素次序为Y₂O₃含量＞烧结温度＞热压压力，抗弯强度的影响因素次序为烧结温度＞Y₂O₃含量＞热压压力；且Y₂O₃能促进铁基金刚石胎体组织的致密化，降低其烧结温度。在烧结温度为780 ℃、热压压力为51 kN的较优烧结工艺下，适量的Y₂O₃能使金刚石工具的孔隙率减小、黏结状况改善，并增强黏结剂对金刚石磨粒的把持能力。
- 金刚石工具 /
- Y₂O₃ /
- 力学性能 /
- 锋利度
Abstract: The effects of hot pressing pressure, sintering temperature and Y₂O₃ content on the hardness, the density, the flexural strength and the fracture morphology of the iron-based matrix were studied by orthogonal test, and the better sintering process parameters were obtained. On this basis, the iron-based diamond tool containing Y₂O₃ was prepared, and its fracture morphology, wear resistance and sharpness were detected and analyzed.The results show that the order of factors affecting the relative density and the hardness of the iron-based binder matrix containing Y₂O₃ is Y₂O₃ content, followed by the sintering temperature and the hot pressing pressure, and the influencing factor order of the flexural strength is sintering temperature, Y₂O₃ content and hot pressing pressure. Y₂O₃ can promote the densification of iron-based diamond matrix structure and reduces its sintering temperature. Under the better sintering process with sintering temperature of 780 ℃ and hot pressing pressure of 51 kN, an appropriate amount of Y₂O₃ can reduce the porosity of diamond tools, improve the bonding condition, and enhance the holding ability of binder to diamond abrasive particles.
- diamond tool /
- Y₂O₃ /
- mechanical property /
- sharpness

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图 1 试样相对密度随各因素及水平变化的趋势

Figure 1. Variation trend of relative densities of samples with factors and levels

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图 2 试样硬度随各因素及水平变化的趋势

Figure 2. Variation trend of hardness of samples with factors and levels

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图 3 试样抗弯强度随各因素及水平变化的趋势

Figure 3. Variation trend of flexural strengths of samples with factors and levels

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图 4 部分胎体试样断口形貌

Figure 4. Fracture morphologies of some matrix samples

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图 5 金刚石工具各试样断口形貌

Figure 5. Fracture morphology of diamond tool samples

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图 6 金刚石工具磨损面形貌

Figure 6. Morphologies of wear surface of diamond tools

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表 1 铁基胎体配方表（质量分数)

Table 1. Formula of iron-based matrix (mass fraction)

配方编号	CuSn15 ω₂ / %	FeCu30 ω₃ / %	FeCu40Ni12Sn7Co10 ω₄ / %	Y₂O₃ ω₁ / %
D	27.00	63.00	10.00	0
E	26.93	62.84	9.98	0.25
F	26.87	62.68	9.95	0.50
G	26.80	62.52	9.93	0.75

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表 2 正交试验的因素和水平

Table 2. Factors and levels of orthogonal test

水平	因素
水平	热压压力 F / kN A	烧结温度 θ / ℃ B	Y₂O₃质量分数 ω₁ / % C
1	43	760	0
2	47	780	0.25
3	51	800	0.50
4	55	820	0.75

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表 3 胎体烧结试样正交试验方案及性能检测结果

Table 3. Orthogonal test scheme and performance test results of matrix sintered samples

试验编号	A	B	C	相对密度 R₁	硬度 / HV	抗弯强度 σ₁ / MPa
1#	1	1	1	0.950 4	225.48	934
2#	1	2	2	0.949 1	283.00	1 003
3#	1	3	3	0.947 9	230.48	930
4#	1	4	4	0.993 8	241.00	1 163
5#	2	1	2	0.935 6	230.00	896
6#	2	2	1	0.954 2	246.03	999
7#	2	3	4	0.989 1	221.00	1 058
8#	2	4	3	0.960 8	215.00	1 096
9#	3	1	3	0.946 5	209.73	913
10#	3	2	4	0.984 8	220.93	1 027
11#	3	3	1	0.957 7	241.48	1 013
12#	3	4	2	0.948 5	277.90	957
13#	4	1	4	0.973 3	230.13	1 062
14#	4	2	3	0.952 4	232.80	934
15#	4	3	2	0.959 6	246.50	1 066
16#	4	4	1	0.967 0	272.50	1 186

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表 4 正交试验结果的极差分析结果

Table 4. Range analysis results of orthogonal test results

水平	相对密度 R₁			硬度 / HV			抗弯强度 σ₁ / MPa
水平	A	B	C	A	B	C	A	B	C
1	0.960 3	0.951 5	0.957 3	244.99	223.83	246.37	1008	951	1033
2	0.959 9	0.960 1	0.948 2	228.01	245.69	259.35	1013	991	981
3	0.959 4	0.963 6	0.951 9	237.51	234.86	222.00	978	1017	969
4	0.963 1	0.967 5	0.985 3	245.48	251.60	228.26	1062	1101	1078
极差值	0.003 7	0.016 1	0.037 0	17.48	27.77	37.35	84	150	109

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表 5 金刚石胎体/工具试样性能测试结果

Table 5. Performance test results of diamond matrix/tool samples

编号	C	胎体			金刚石工具			抗弯强度损失率 η / %
编号	C	相对密度 R₁	硬度 / HV	抗弯强度 σ₁ / MPa	相对密度 R₂	硬度 / HV	抗弯强度 σ₂ / MPa	抗弯强度损失率 η / %
D	0	0.955 0	220.50	1 050.35	0.984 9	239.78	755.38	28.80
E	0.25	0.952 8	201.00	1 022.25	0.978 3	247.53	651.25	36.29
F	0.50	0.956 1	210.00	998.00	0.987 0	245.00	899.00	9.91
G	0.75	0.984 8	220.93	1 027.00	0.994 9	242.00	791.75	22.90

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表 6 金刚石工具试样耐磨性测试结果

Table 6. Wear resistance test results of diamond tool samples

试样编号	C	工具试样损耗的质量 m₁ / g	砂轮损耗的质量 m₂ / g	磨耗比 R
D	0	0.11	13.50	0.008 1
E	0.25	0.27	11.80	0.022 9
F	0.50	0.25	22.90	0.010 9
G	0.75	0.30	21.80	0.013 8

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