29
2024
-
04
Surface and solidification knowledge of precision machining
Precision machining of the surface there will be a lot of gray-black round shallow pits, equipment in the absence of cleaning before the pits filled with this slag material, these substances in the degree will directly affect the quality of our castings.
Precision machining processing is convenient to use to save its materials, in the process of operation can save its resources, many casting methods can only cast a relatively simple casting, and another advantage of precision machining is that it can cast complex castings.
Precision machining in the processing of the need to pay attention to the problem is more than one, is due to its steel activity function is relatively poor, in the process of processing, we in order to help prevent the occurrence of its precision machining pouring lack of volatile is the cold segregation, so that the precision machining of the wall thickness can not be less than 8mm.
Precision machining solidification methods are as follows:
1, intermediate solidification: the solidification of most alloys between layer-by-layer solidification and paste-like solidification.
2, paste solidification: alloy crystallization temperature range is very wide, in the solidification of a certain period of time, the surface of the precision machining does not exist solid layer, solidification zone throughout the section, the first paste, after solidification.
3, layer by layer solidification: metal, eutectic composition alloy in the solidification process without solidification zone, section liquid, solid two phases are clearly separated by a boundary, with the decline in temperature, the solid phase layer continues to increase, the liquid phase layer continues to decrease, the middle.
Wenling Lihua Machinery Co., Ltd
ADD:West Linqi Road, South Xiantian Village, Songmen Town, Wenling City, Taizhou City, Zhejiang Province
Domestic Sales Department