冷却强度也称为冷却速度。冷却强度不但对铸锭的裂纹有影响，而且对铸锭的组织影响更大、随着冷却强度的增大，铸锭结晶速度提高，晶内结构更加细化；随着冷却强度增大，铸锭液穴变浅。过渡带尺寸缩小，使金属补缩条件得到改善，减少或消除了铸锭中的疏松、气孔等缺陷。铸锭致密度提高，另外还可以细化一次品化合物的尺寸，减小区域偏析的程度。
Cooling is also known as cooling speed. The cooling strength not only affects the crack of ingot, but also has greater influence on the structure of ingot. With the increase of cooling strength, the crystallization speed of the ingot is increased and the intragranular structure is more refined. With the increase of cooling strength, the hole of the ingot is shallow. The size of the transition zone is reduced, which improves the condition of metal feeding and reduces or eliminates defects such as porosity and porosity in ingots. The density of the ingot is increased, and the size of one compound can be refined, and the degree of regional segregation can be reduced.
老式铸造法多采用分体结晶器，尤其是铸造扁铸锭时，水套与结晶器是分开的。随着铸造工艺技术的发展，现代铸造法的结晶器是一体的。用老式结晶器铸造时冷却水消耗量大，因为老式结晶器供 水不是封闭的，一部分冷却水敞火而起不到冷却作用，而且一次冷却与二次冷却的冷却强度差别大，不可避免的产生一些铸锭质量缺陷；而用现代结晶器铸造时，冷却水消耗量小，实践证明它仅是老式结晶 器用水量的70％左右。目前国外多采用低液位结晶器铸造，其目的就是提高冷却强度，减少或消除一次冷却后气隙区的加热现象，因此几乎不存在二次冷却的淬火情况、扁铸锭普通铸造已经将结晶器高度 降至100，当然这需要操作者有很高的操作水平或增设液位白动控制系统。
In old fashioned casting, separate mold is used, especially when casting flat ingot. The water jacket is separate from the crystallizer. With the development of foundry technology, the crystallizer of modern casting method is integrated. The cooling water consumption of the old mold is large, because the water supply of the old mold is not closed, some of the cooling water is open and does not play a cooling effect, and the cooling strength of the one cooling and two cooling is very different, and some ingot quality defects are inevitably produced; and the cooling water is cast in the modern mold. Consumption is small. Practice proves that it is only about 70% of the water consumption of the old mould. At present, the low level mold casting is used in foreign countries. The purpose is to improve the cooling strength and reduce or eliminate the heating phenomenon in the air gap area after the first cooling. Therefore, there is almost no quenching condition of two cooling. The ordinary casting of flat ingot has reduced the height of the mould to 100. Of course, this requires the operator to have a very high level of operation. Or add liquid level white motion control system.
冷冲却强度对冷却水温度的要求是不可忽视的，通常情况下，冷却水温设定在20度，但是由于地区气候条件。供水设施条件及厂房温度等不同导致变化较大，因而出现地区性或季节性铸锭质量缺陷。现代结晶器供水系统带有脉冲或交叉变相功能，均由工艺编程决定，因此冷却强度可依据铸造工艺需要设定为曲线，特别是针对某些低温塑性不好的硬合金，铸造时冷裂纹和热裂纹几乎同时存在，附加挡水板系统，使铸锭表面温度升高到拉伸变形塑性温度，消除铸锭冷裂纹，工艺上再采取防止热裂纹措施，即可以获得优质铸锭。
The requirement for cooling water temperature is not negligible. Normally, the cooling water temperature is set at 20 degrees, but due to regional climate conditions. The difference of water supply facilities and plant temperature has led to a great change, resulting in regional or seasonal ingot quality defects. The modern crystallizer water supply system has the function of pulse or cross phase change, all of which are determined by process programming, so the cooling strength can be set as a curve according to the needs of the casting process, especially for some hard alloys with low temperature plasticity, cold and hot cracks in the casting are almost at the same time, and the surface of the ingot surface is added to the surface of the ingot. When the temperature rises to the plastic deformation temperature, the cold crack of the ingot will be eliminated, and the measures to prevent the thermal crack will be adopted in the process, that is to say, the high quality ingot can be obtained.