Surface salt resistant treatment process for rotary bearing
A technology of slewing bearing and treatment process, which is applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems that the surface treatment process of slewing bearing does not meet the use requirements, the use environment is harsh, etc., and achieve performance improvement , Excellent salt corrosion resistance, good high temperature mechanical properties
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Embodiment 1
[0034] Example 1: The nitriding salt used in the first salt bath nitriding is calculated by mass percentage, and the formula consists of: urea 51.122%, NaCN 1.2%, YCl 3 ·6H 2 O 0.012%, KCNO 20%, NaCNO 19.423%, NaCl 8.243%;
[0035] The oxidation salt used in a salt bath oxidation is calculated by mass percentage, and the formula is composed of: KNO 3 26%, NaNO 3 20%, NaCl25%, NaNO 2 27%, borax 2%;
[0036] The oxidation salt used in the secondary salt bath oxidation is calculated by mass percentage, and the formula is composed of: KNO 3 23.223%, NaNO 3 30%, NaCl 21.442%, NaNO 2 25.322%, YCl 3 ·6H 2 O 0.013%
Embodiment 2
[0037] Example 2: The nitriding salt used in the first salt bath nitriding is calculated by mass percentage, and the formula consists of: urea 50.322%, NaCN 1%, YCl 3 ·6H 2 O 0.012%, KCNO 21%, NaCNO 18.423%, NaCl 9.243%.
[0038] The oxidation salt used in a salt bath oxidation is calculated by mass percentage, and the formula is composed of: KNO 3 25%, NaNO 3 21%, NaCl 24%, NaNO 2 28%, borax 2%.
[0039] The oxidation salt used in the secondary salt bath oxidation is calculated by mass percentage, and the formula is composed of: KNO 3 24.223%, NaNO 3 29%, NaCl 22.442%, NaNO 2 24.323%, YCl 3 ·6H 2 O 0.012%.
Embodiment 3
[0040] Example 3: The nitriding salt used in the first salt bath nitriding is calculated by mass percentage, and the formula consists of: urea 49.222%, NaCN 1.1%, YCl 3 ·6H 2 O 0.012%, KCNO 22%, NaCNO 17.423%, NaCl 10.243%;
[0041] The oxidation salt used in the primary salt bath oxidation is calculated by mass percentage, and the formula composition is: KNO3 24%, NaNO3 22%, NaCl23%, NaNO2 28%, borax 3%;
[0042] The oxidation salt used in the secondary salt bath oxidation is calculated by mass percentage, and the formula is composed of: KNO 3 22.225%, NaNO 3 28%, NaCl 24.442%, NaNO 2 25.323%, YCl 3 ·6H 2 O 0.010%.
[0043] The steps of the method used in the above embodiments are all the same, and all are carried out according to the following steps in the present invention: 1) cleaning; 2) preheating once; 3) salt bath nitriding once; 4) cleaning; 5) carburizing treatment once; Second preheating; 7) Polishing; 8) First salt bath oxidation 9) Second carburizing treatmen...
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