There are many method of solidifying casting. Casting solidification process, on which the cross-section is generally divided into three zones: Zone 1- Solid 2- 3- liquid solidification zone Zone on solidification zone is larger width 750kn bollard solidification zone, and so divided solidification mode. First, the intermediate solidification: between coagulation and mushy layer by layer solidified alloy solidification between majority. Second, layer by layer solidification: pure metals, eutectic alloy during solidification without coagulation zone, section liquid, solid two-phase clearly separated by a boundary, with the temperature drops, the solid phase layer increasing, decreasing the liquid layer, direct access to the center. Third, the paste solidified: alloy crystallization temperature range is very wide bollard, certain period of time in the solidification, the casting surface is not presence of a solid layer, solidification zone throughout the cross-section, the first paste after curing. Experts said that factors that affect the way solidification summary: First, the casting temperature gradient. Alloy crystallization temperature range is constant, the solidification zone width depends on the inner and outer layers of the casting temperature gradient. The smaller temperature gradient, the more wide solidification zone. (Inside and outside temperature, and cooling fast, narrow solidification zone). Second, the alloy crystallization temperature range. Small range: narrow solidification zone, the more inclined solidified layer by layer. Eg: sand casting 1500kn bollards, low carbon steel solidified layer by layer, high carbon paste solidification of the casting producing countries, casting serious domestic overproduction, but our cast serious excess capacity refers to the country's low-end Casting overcapacity 1000kn bollard, China's high-end casting production is difficult to market needs satisfaction, therefore, our casting industry needs to produce low-end castings can be converted into high-end casting production capacity, promote the progress of the casting industry in China. 250kn bollard bollard _ _ Chen Hua machinery provided by China Machinery Co., Ltd. Qingdao Chen. Qingdao Hua Chen Machinery Co., Ltd. (www.qdchenhua.com) strong, credible, in Qingdao, Shandong CNC machine tool industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chen Hua machinery and you hand into the brilliant, for a better future!