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13
2021
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02
Foundry: How to reduce losses if defects occur in castings?
Foundry
Foundry: Methods to reduce losses due to defects in castings. During the casting process, defects such as porosity, pinholes, slag inclusions, cracks, and pits often occur due to various factors.
Foundry: Castings How to reduce losses due to defects
During the production process, castings often exhibit defects such as porosity, pinholes, slag inclusions, cracks, and pits due to various factors.
At this time, in order to enable the casting to meet the usage standards and reduce losses and waste, the defects are often repaired. Commonly used repair equipment includes argon arc welding machines, resistance welding machines, cold welding machines, etc. For casting defects with low quality and appearance requirements, argon arc welding machines and other welding machines with high heat generation and fast speed can be used for repair.
Foundry: However, in the field of precision casting defect repair, due to the large heat-affected zone of argon welding, the repair will cause deformation, reduced hardness, sand holes, local annealing, cracking, pinholes, wear, scratches, undercuts, or insufficient bonding force and internal stress damage and other secondary defects of the casting. The cold welding machine overcomes the above shortcomings. Its advantages are mainly reflected in the small heat-affected zone, no preheating, and room temperature cold welding repair, so there is no deformation, undercut, and residual stress, no local annealing is generated, and it does not change Casting the metal structure state of the part.
Because the cold welding machine is suitable for surface defect repair of precision castings. The cold welding range is the process of repeated melting and accumulation of Φ1.5-Φ1.2mm welding points. In the process of large-area defect repair, the repair efficiency is the reason that restricts its wide promotion and application. For large defects, the composite application of traditional welding process and casting defect repair machine is recommended.
Foundry : When choosing a cold welding machine, you should also choose equipment with the advantages of simple operation, high welding efficiency, high post-weld strength, and no falling off after post-weld shot peening and machining. Choose such a cold welding machine, after welding, repairing and polishing, you can't see the repair marks at all.
Casting, foundry, casting
Shandong Gongchen Machinery Technology Co., Ltd.
Contact QQ: 258506508
Mobile Number:15621618888
Phone:0536-7691368 7691229
Fax: 0536-7691229
Contact Email:guisongzhng8@gmail.com
Website:www.shandonggongchen.com Gongchen.China Valve Castings.China
Address: Mucun Town, Fangzi District, Weifang City, Shandong Province
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