使冷床区域产生空气自然对流，形成烟囱效应，造成冷床上圆钢下部冷却速度过快，出现冷却不均匀，影响了产品的质量。当流态层温度为300℃时，奥氏体分解温度约为500℃左右，比铅浴淬火还低。步进翻转冷床利用步距与齿距的差值，使圆钢在冷床上每移动一个齿距，圜钢就滚动了一个角度，避免了圆钢在冷床上的不均匀冷却所造成的质量问题。

The cooling bed area of air natural convection, the formation of a chimney effect caused by the cooling bed bar lower cooling speed, appear uneven cooling effect of the quality of the products. Step by step difference of inverted cooling bed and pitch, the bar in the cooling bed every movement of a pitch, round steel rolling an angle, to ***oid quality problems of round non-uniform cooling in the cooling bed caused by.

二小型作业区型材改造试生产过程中，通过冷床裙板自重式防止角钢倾翻装置的设计及应用，在小角钢的收集过程中，省去了在移钢小车处人工将角钢翻正操作，压缩了了冷床输出的时间，有效防止因角钢倾翻而影响钢材的输出节奏，实现了冷床正常稳定的下钢。

Two ***all work area profile transformation production process, prevent the inclination angle of design and application of double bed apron device by gr***ity, in the process of collecting ***all angle, eliminating the need for moving steel trolley artificial angle righting operation, the output of the compressed cooling bed time, effectively prevent tilting angle and effect of output rhythm of steel, the steel cooling bed under normal and stable.

明确轴向位置，加大矫直压力。不要单独打8辊轴向，调整侧弯时应以每相临的3个辊为一个调整单元，保证矫直稳定性。其他优点是冷却温度比较均匀，温差不大于5～10℃，而且不具有粘着性，不会像铅浴或盐浴处理时出现挂铅、挂盐现象。侧壁斜度的处理措施是经常注意检查各辊轴向位置，窜动情况。注意在不同间隙情况下，矫直力的选取。对H2与H3的测量做到每批抽查，以做到及时调整。

The axial is clearly defined and the straightening pressure is increased. Do not play the 8 roll axis alone. When adjusting the side bend, 3 rolls per phase should be used as an adjustment unit to ensure the straightening stability. The treatment of side wall slope is to check the axial and movement of each roll. Pay attention to the selection of maximum straightening force under different clearance conditi. The measurement of H2 and H3 is done in each batch, so as to adjust it in time.

拉钢式和往复多爪推齿式两种冷床对于圆钢都不太适用，容易拉斜、滚乱。冷却圆钢（管坯）以使用链式冷床较好，上钢一厂、大连钢厂的650轧钢车间都采用链式冷床，两者所不同之处在于：上钢一厂的圆钢搁在台架上，链条拉着圆钢缓慢前进，由于圆钢单重较大，一般不会乱滚。这种拉钢机往往配备有潜行装置，以达到有选择性地拖运某一根（束）轧件的目的。大连钢厂的圆钢直接搁在链条上，前进过程中圆钢与链条无相对运动。两种链式冷床使用单位反映都较好。

The two kinds of cooling beds, pulling steel type and reciprocating multi tooth type, are not very suitable for round steel. Cooling round steel (Guan Pi) to use the chain type cold bed is better, the 650 steel mill of Shanghai steel factory and Dalian steel mill use chain cold bed. The difference lies in that the round steel in the first steel plant is on the bench, the chain pulls the round steel slowly forward, because the single weight of the round steel is larger, it will not roll out. The round steel of Dalian steel plant is directly placed on the chain, and there is no relative movement between round steel and chain during the progress. The use unit of the two types of chain cold beds is better.