{'fraction_non_alphanumeric': 0.01580278128950695, 'fraction_numerical': 0.008217446270543615, 'mean_word_length': 5.383064516129032, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Restoration of parts from heat-resistant steels by arc surfacing in conditions of high humidity

The main technological processes for restoring parts are welding surfacing processes. The reliability of restored parts is usually determined by the quality of the welded joint. The quality of the deposited metal is influenced by hydrogen, but the effect of hydrogen on destruction during reheating has not been sufficiently studied. (Research purpose) The research purpose is studying the effect of increased hydrogen content on the resistance of the deposited metal to destruction during heat treatment. (Materials and methods) The studies were performed on small-sized samples made of heat-resistant 15Kh24MFA and 15Kh1N1F steel. The prepared samples were applied with deposited rollers under local cooling. Tests of welded samples were carried out under conditions of isothermal relaxation of applied stresses. The change in the saturation of the deposited metal with hydrogen occurred as a result of wetting the argon during surfacing. (Results and discussions) The article describes that when the hydrogen content of the deposited metal increases, the resistance index decreases by 20 percent. Preheating samples before welding to a temperature of 300 degrees Celsius increases the resistance of the deposited metal. (Conclusions) Experimental studies have shown that the hydrogen content in the deposited metal negatively affects the resistance to destruction. The article shows that the zone of thermal influence is the most dangerous area of crack generation during surfacing.