| Autor: |
Ворончук, О. П., Жудра, О. П., Кайда, Т. В., Кочур, В. О., Капітанчук, Л. М., Єремєєва, Л. М. |
| Zdroj: |
Automatic Welding / Avtomatitcheskaia Svarka; 2022, Issue 2, p11-15, 5p |
| Abstrakt: |
It is generally known that wear resistance of the deposited layer in the above-mentioned alloys depends on the reinforcing phase characteristics, its concentration and qualities of the matrix alloy. The methods of X-ray structural, metallographic analyses and X-ray microanalysis of metal of 500Kh30M type deposited by flux-cored strips revealed the dependence of the concentration, form, orientation, phase components and integral hardness of the carbides on the method of adding chromium as the main carbide forming element, to the charge. It is found that the maximum concentration of the carbide phase of up to 80…90 % in the deposited layer is achieved at addition of Cr3C2 chromium carbide to the flux-cored strip charge. Complex carbide systems - (CrFe)7С3В are mainly present in the deposited metal for all the samples. Molybdenum does not form any separate carbide compounds, but it is a component in carbides of (Cr2.5Fe4.2Мо0.2)С3 type. High concentration of the carbide component leads to carbide washout, in connection with a considerable reduction of the matrix alloy. Optimal concentration of the carbide phase in metal of 500Х30М type deposited with flux-cored strip, is achieved by adding a carbide forming element – chromium to the electrode material charge in the proportion of 15…25 % chromium carbide and 75…85 % ferrochrome. 11 Ref., 3 Tabl, 6 Fig. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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