Parameters of Laser Cutting Ni-Based Alloy Steel with Factors Interaction

Fig. 4. The second group test metallography. (a) No. 1; (b) No. 2; (c) No. 3; (d) No. 4; (e) No. 5; (f) No. 6;(g) No. 7; (h) No. 8; (i) No. 9; (j) No. 10; (k) No. 11; (l) No. 12; (m) No. 13; (n) No. 14; (o) No. 15; (p) No. 16

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Table 1. 1 C match E table
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Table 1. 1 C match E table
Match E₁, C₁ E₂, C₁ E₁, C₂ E₂, C₂
R /μm 311.50 301.42 232.48 335.92

Table 1. 0 Visual analysis of the second orthogonal experimental interaction

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Table 1. 0 Visual analysis of the second orthogonal experimental interaction

Statisticaverage	C	D	C×D	E	C×E	D×E	7	F	C×F	D×F	11	E×F	13	14	15
K₁	612.92	597.78	592.28	543.98	647.42	599.6	586.62	591	597.24	587.96	595.78	578.66	589.74	588.46	600.44
K₂	568.40	583.54	589.04	637.34	533.90	581.72	594.70	590.32	584.08	593.36	585.54	602.66	591.58	592.86	580.88
R	44.52	14.24	3.24	93.36	113.52	17.88	8.08	0.68	13.16	5.40	10.24	24.00	1.84	4.40	19.56

Table 1. Levels of each factor in the orthogonal test
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Table 1. Levels of each factor in the orthogonal test
Symbol Factor Level 1 Level 2
A Gas pressure /MPa 0.3 0.4
B Defocusing distance /mm -0.5 -1.0
C Cutting speed /(mm·min^-1) 200 300
D Electric current /A 200 210
E Pluse width /ms 0.8 0.9
F Frequency /Hz 75 80

Table 2. List of L8(27) interaction between two columns
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Table 2. List of L8(27) interaction between two columns
Number 1 2 3 4 5 6 7
(1) (1) 3 2 5 4 7 6
(2) (2) 1 6 7 4 5
(3) (3) 7 6 5 4
(4) (4) 1 2 3
(5) (5) 3 2
(6) (6) 1
(7) (7)

Table 3. Top design of the first group
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Table 3. Top design of the first group
Factor A B A×B C A×C B×C Blank
Column 1 2 3 4 5 6 7

Table 4. Top design of the second group
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Table 4. Top design of the second group
Factor C D C×D E C×E D×E Blank F C×F D×F Blank E×F Blank Blank Blank
Column 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Table 5. Chemical composition of GH3128 (mass fraction, %)
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Table 5. Chemical composition of GH3128 (mass fraction, %)
Ni Cr W Mo Al Ti Fe B Zr Ce
Bal. 19.0-22.0 7.5-9.0 7.5-9.0 0.4-0.8 0.4-0.8 1.0 0.005 0.04 0.05

Table 6. Results of the first orthogonal test

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Table 6. Results of the first orthogonal test

Number	A	B	A×B	C	A×C	B×C	Blank	Average slagthickness /μm	Average kerfwidth /μm
1	1	1	1	1	1	1	1	434	175.0
2	1	1	1	2	2	2	2	254	165.0
3	1	2	2	1	1	2	2	690	217.5
4	1	2	2	2	2	1	1	258	137.5
5	2	1	2	1	2	1	2	466	200.0
6	2	1	2	2	1	2	1	198	157.5
7	2	2	1	1	2	2	1	418	187.5
8	2	2	1	2	1	1	2	254	172.5

Table 7. Results of the second orthogonal test

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Table 7. Results of the second orthogonal test

Number	Factor	Slag /μm	Kerf /μm	Percentage /%	Score
1	111111111111111	323.33	137.5	100	80.08
2	111111122222222	293.33	162.5	100	79.08
3	111222211112222	316.67	165.0	100	77.67
4	111222222221111	360.00	180.0	100	74.00
5	122112211221122	406.67	155.0	100	74.17
6	122112222112211	326.67	155.0	100	78.17
7	122221111222211	330.00	155.0	100	78.00
8	122221122111122	450.00	157.5	100	71.75
9	212121212121212	273.33	105.0	65	55.79
10	212121221212121	323.33	125.0	80	65.07
11	212212112122121	196.67	160.0	100	84.17
12	212212121211212	226.67	167.5	100	81.92
13	221122112211221	223.33	125.0	65	56.12
14	221122121122112	120.00	115.0	60	55.50
15	221211212212112	200.00	150.0	100	85.00
16	221211221121221	213.33	145.0	100	84.83

Table 8. Visual analysis of the first orthogonal experimental interaction

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Table 8. Visual analysis of the first orthogonal experimental interaction

Testindex	Statisticaverage	Interaction factor
Testindex	Statisticaverage	A	B	A×B	C	A×C	B×C	Blank
Slag thickness /μm	K₁	1636	1352	1360	2008	1576	1412	1308
	K₂	1336	1620	1612	964	1396	1560	1664
	R	300	268	252	1044	180	148	356
Kerf width /μm	K₁	695.0	697.5	700.0	780.0	722.5	685.0	657.5
	K₂	717.5	715.0	712.5	632.5	690.0	727.5	755.0
	R	22.5	17.5	12.5	147.5	32.5	42.5	97.5

Table 9. B match C table
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Table 9. B match C table
Match C₁, B₁ C₂, B₁ C₁, B₂ C₂, B₂
R /μm 375.0 322.5 405.0 310.0

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Tianchi Yu, Yuxiang Chen, Xin Yue, Zhijun Liang, Jiacheng Jin. Parameters of Laser Cutting Ni-Based Alloy Steel with Factors Interaction[J]. Laser & Optoelectronics Progress, 2018, 55(2): 021413

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