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引言随着东德国营铁路120型内燃机车(装有14D40型柴油机)和130-132型内燃机车(装有5D49型柴油机)走行公里数的增加,在气缸头排气阀孔过桥处产生裂纹的情况越来越严重。为了确保备件的供应以及从经济观点出发迫切需要试验一种合适的方法来修复这种复杂的铸件。为了解决所有这些问题,需要查清损伤的原因,以及研究选择适合的焊接方法,热处理方法和焊接填充料。此外,必须在一个铁路修理工厂中建立一个车间,该车间保证严格遵照技术要求进行焊接。
INTRODUCTION As the number of miles traveled by the East German state-owned 120-type diesel locomotive (equipped with a 14D40 diesel engine) and the 130-132 diesel engine (equipped with a 5D49 diesel engine) has increased, cracks develop in the cylinder head exhaust valve bore bridge The situation is getting worse. In order to ensure the supply of spare parts and to economically justify the need to test a suitable method to repair such complex castings. In order to solve all these problems, it is necessary to find out the cause of the damage, and to study and select the suitable welding method, heat treatment method and welding filler. In addition, a workshop must be set up in a railway repair shop, which ensures that the welding is carried out in strict accordance with the technical requirements.