Quantitative assessment of new high-speed steel substrate and PVD wear-resistant coatings

The results of studies of the influence of the material of the tool base on the formation of stresses in wear-resistant coatings of various compositions are presented. It is shown that the stresses in the coating during the cutting process depend on the properties of the material of the tool base and the composition of the coatings. The stresses change in the coatings during the cutting process is analyzed. It is shown that the use of coatings with high compressive stresses makes it possible to increase the period of resistance of plates made of hard alloy and high-speed steel.

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Increase Effectiveness of Shaving by Using Wear-Resistant Coatings and Preliminary Modeling Cutting

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.299.839 ◽

2020 ◽

Vol 299 ◽

pp. 839-844

Author(s):

Vitaliy N. Gilman ◽

Ayrat I. Faskhutdinov ◽

Igor P. Balabanov

Keyword(s):

Titanium Nitride ◽

Tool Life ◽

High Speed ◽

High Speed Steel ◽

Surface Preparation ◽

Wear Resistant ◽

Wear Resistant Coatings ◽

Multicomponent Coating

Study of influence the edge and surface preparation and use of various types of coatings on the shaving cutters from the high-speed steel DIN 1.3243 (W6Mo5Cr4V2Co5 - China), with a hardness of 62-64HRc, for processing of the driven gear part, made of steel DIN 1.6523 (20CrNiMoH - China) with a hardness of 156-207 HB is presented. For the analysis, coatings based on titanium nitride (TiN) and a multicomponent coating of titanium and aluminum (AlTiN) were used. The coating on the basis of titanium nitride (TiN) increased the tool life 1.4 times. Multicomponent coating of titanium and aluminum (AlTiN) increased the tool life 1.6 times (AlTiN).

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Estimation of the Heat Stability of Hardened Cr-V Cast Irons

Materials Science Forum ◽

10.4028/www.scientific.net/msf.870.558 ◽

2016 ◽

Vol 870 ◽

pp. 558-563

Author(s):

Yu.D. Koryagin ◽

V.L. Il'ichev

Keyword(s):

High Speed ◽

Structural Changes ◽

High Speed Steel ◽

Heat Stability ◽

Maximum Hardness ◽

Cast Irons ◽

Wear Resistant ◽

Secondary Hardness ◽

Double Tempering ◽

Structure Properties

The paper describes the structure, properties and heat stability of white cast irons containing 2.5 – 3.0 %C, 14 and 20 %Cr, 3 %V after the secondary hardness treatment (quenching from 1150 °C and double tempering at 560 °C). It is shown that after the secondary hardness treatment M23C6 carbides appear along with the M7C3 phase. Heat stability of the alloys is estimated according to GOST 19265-73 standard. The effect of the temperature and duration of holding at 520–620 °C on structural changes and softening of secondary hardness treated cast irons is considered in comparison with high-speed steel and cast irons of the same composition quenched for the maximum hardness (from 1050 °C). The processes occurring at higher temperatures and long holdings that are responsible for softening of secondary hardness treated cast irons are studied. It is shown that the alloys under consideration after the secondary hardness treatment achieve the hardness of HRC 60 and more, and are able of pertaining it when heated up to 540 °C for 20 hours. This allows using these alloys as wear-resistant materials in the said temperature range.

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