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Home / Issues / № 3, 2017

Engineering

EFFECT OF ION NITRIDING REGIMES ON THE STABILITY OF THE CUTTING TOOL
Pronin A.I., Mylnikov V.V., Kondrashkin O.B., Romanov A.D., Chernyshov E.A.
The problem of machinability of titanium alloys attracted the attention of a sufficiently large number of researchers, both in our country and abroad [1-6]. Suffice it to say that the wide use of titanium alloys instead of aluminum and magnesium alloys has led to an increase in the labor intensity of machining in the aviation industry by about 10 times, and the need for a cutting tool has increased by 10 ... 15 times. The problem of machinability of titanium alloys is even more acute due to the extensive use for their processing of machines with numerical control.

The purpose of this work is to study the influence of the parameters of the ion nitriding regimes applied on the end mills from high-speed steel on their resistance to the treatment of the titanium alloy VT20.

The parameters of ion nitriding regimes and their effect on the resistance of the cutting tool are given in Table 1.

Table 1.

 Regimes of ion nitriding and their effect on the durability of end mills

the mode of hardening, №

Current fed to the substrate

In, А

Current supplied to the anode

Ia, А

The temperature of the tool

t, С

Tool life

Т, min.

Coefficient of resistance increase

base

 

 

 

36

1

1

80

100

450

46

1.3

2

60

80

450

55

1.5

3

50

70

450

38

1.05

4

70

90

300

24

0.66

5

70

90

400

46

1.3

6

70

90

500

67

1.86

7

70

90

550

45

1.25

 The results of the durability test made it possible to establish that the best mode for processing the titanium alloy VT20 is the tool hardening mode by ion nitriding No. 6. In this mode, the relative resistance of the tool in comparison with the basic (in the state of delivery) increased by 1.86 times (Table 1).



References:
1. Sato X. Mechanical treatment of titanium alloys. Kinzoku, 1982. Vol. 52. No. 3. pp. 58-66.

2. Mylnikov V.V., Pronin A.I., Chernyshov E.A. Increase the efficiency of end milling cutters // International Journal of Applied and Fundamental Research. 2013. No. 10 (part 2). pp. 227.

3. Vereshchaka A.S., Tretyakov I.P. Cutting tools with wear-resistant coatings. Moscow: Mechanical Engineering, 1986. 192 p.

4. Pronin A.I., Mylnikov V.V., Chernyshov E.A. Causes of low working capacity of plates from cutting ceramics at hard turning // Materials Science. 2014. No. 5. pp. 13-15.

5. Pronin A.I., Mylnikov V.V., Rozhkov I.I. Improvement of processing efficiency due to the use of cutting tools equipped with reinforced plates of superhard materials and cutting ceramics // International Journal of Applied and Fundamental Research. No. 10 (part 2). 2013. pp. 377-380.

6. Pronin A.I., Mylnikov V.V. Influence of different methods of hardening on the operability of cutting inserts made of polycrystalline superhard materials and mineral ceramics in the processing of hard-to-work materials. // Technology of metals. 2011. No. 9. pp. 36-41.



Bibliographic reference

Pronin A.I., Mylnikov V.V., Kondrashkin O.B., Romanov A.D., Chernyshov E.A. EFFECT OF ION NITRIDING REGIMES ON THE STABILITY OF THE CUTTING TOOL. International Journal Of Applied And Fundamental Research. – 2017. – № 3 –
URL: www.science-sd.com/471-25285 (22.09.2020).