Microstructure and Cutting Performance of WC/Co<sub>5</sub>0/Al Cemented Carbide Coated Tools Fabricated by Laser Cladding Process

Table 1. Chemical composition of 45 steel (mass fraction, %)
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Table 1. Chemical composition of 45 steel (mass fraction, %)
Composition C Si Mn Cr Ni Cu Fe
Content 0.42-0.50 0.17-0.37 0.50-0.80 ≤0.25 ≤0.30 ≤0.25 Bal.

Table 2. Chemical composition of Co50 self-fluxing alloy powder (mass fraction, %)
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Table 2. Chemical composition of Co50 self-fluxing alloy powder (mass fraction, %)
Composition C W Si B Cr Mo Fe Ni Co
Content 0.6 3.0 3.5 2.25 20.0 5.1 5.0 14.0 Bal.

Table 3. Geometric parameters of cutting tools
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Table 3. Geometric parameters of cutting tools
Tool type γ₀ /(°) α₀ /(°) K_r /(°) K'_r /(°) λ_s /(°)
YG8 tool 10 10 45 5 5
Tool made by laser cladding 10 10 45 5 5

Table 4. Cutting parameters
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Table 4. Cutting parameters
Sample number v /(r·min^-1) a_p /mm f /(mm·r^-1)
1 105 0.5 0.2
2 210 0.5 0.2
3 260 0.5 0.2
4 105 1.0 0.1
5 210 1.0 0.1
6 260 1.0 0.1
7 105 0.5 0.2
8 210 0.5 0.2
9 260 0.5 0.2
10 105 1.0 0.1
11 210 1.0 0.1
12 260 1.0 0.1

Table 5. EDS analysis results of different points in Fig. 4-6

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Table 5. EDS analysis results of different points in Fig. 4-6

Element	Point in Fig. 4-6 (mass fraction, %)						Point in Fig. 4-6 (atomic fraction, %)
Element	1	2	3	4	5	6	1	2	3	4	5	6
C	16.26	15.33	19.41	16.29	37.36	72.58	73.54	66.46	68.99	65.29	72.58	68.99
Cr		2.15	1.22	1.86	2.56	1.15		2.15	1.01	1.72	1.15	1.01
Fe	2.53	9.96	20.08	15.99	32.45	13.56	2.46	9.29	15.53	13.78	13.56	15.35
Co		2.58	1.66	3.54	2.15	0.85		2.28	1.20	2.89	0.85	1.20
W	81.22	69.99	57.51	62.31	17.89	2.27	24.00	19.83	13.36	16.31	2.27	13.36
Mn			0.11		0.33	0.14			0.09		0.14	0.09
Al					0.91	0.79					0.79
Ni					0.56	0.22					0.22
O					5.78	8.43					8.43

Table 6. Comparison of cutting parameters of two cutting tools in cutting process

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Table 6. Comparison of cutting parameters of two cutting tools in cutting process

Sample number	F_x /N	F_y /N	F_z /N	Q /J	a_ch /mm	a_c /mm	ξ	μ	R_a /μm
1	142	112	461	177	0.50	0.17	2.94	0.61	50
2	116	104	451	346	0.60	0.17	3.53	0.58	25
3	103	101	442	421	0.60	0.17	3.53	0.57	12.5
4	118	139	554	213	0.50	0.09	5.56	0.63	25
5	161	122	521	401	0.50	0.09	5.56	0.59	12.5
6	127	119	508	484	0.50	0.09	5.56	0.59	6.3
7	165	147	673	259	0.60	0.17	3.53	0.55	50
8	127	125	655	503	0.50	0.17	2.94	0.50	6.3
9	121	117	629	598	0.50	0.17	2.94	0.48	6.3
10	156	171	774	297	0.50	0.09	4.44	0.56	50
11	172	156	748	575	0.50	0.09	5.56	0.53	3.2
12	159	144	731	696	0.50	0.09	5.56	0.51	3.2

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Liu Hongxi, Dong Tao, Zhang Xiaowei, Liu Zifeng, Shi Hai. Microstructure and Cutting Performance of WC/Co₅0/Al Cemented Carbide Coated Tools Fabricated by Laser Cladding Process[J]. Chinese Journal of Lasers, 2017, 44(8): 802002

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