冷床是軋鋼生產(chǎn)中重要的輔助設(shè)備。冷床的作用在于將800℃以上的軋件冷卻到150～100℃以下，同時(shí)使軋件按既定方向運(yùn)行，在運(yùn)輸過程中應(yīng)保證軋件不彎曲。由于軋制產(chǎn)品形狀繁多相差懸殊，因此，軋鋼車間的冷床型式是多種多樣的。

The cooling bed is an important auxiliary equipment in steel rolling production. The bed is 800 degrees above the workpiece cooling to 150~100 DEG C, and make the operation according to the established direction, in the transport process should ensure the workpiece does not bend. Because the rolling shape of the product range of disparity, so the type of cooling bed steel workshop are diverse.

側(cè)壁斜度超差產(chǎn)生的原因?yàn)椋?

（1）輥型不正；壓力過大，型鋼與矯直輥間隙過小。

（2）輥?zhàn)幽p、矯直機(jī)軸竄動過大，液壓螺母沒有鎖緊或者止推軸承磨損過大都會引起側(cè)壁斜度超差。

The reas for the deviation of the side wall slope are:

(1) the roll type is not correct; the pressure is too large and the gap between the type steel and the straightening roller is too small.

(2) the roller wears, the straightening machine shaft moves too big, the hydraulic nut is not locked or the thrust bearing wear too much will cause the side wall slope to exceed the difference.

當(dāng)流態(tài)層溫度為250℃時(shí)，奧氏體分解溫度為550～600℃，同鉛浴淬火相似；當(dāng)流態(tài)層溫度為300℃時(shí)，奧氏體分解溫度約為500℃左右，比鉛浴淬火還低。

When the temperature of the flow layer is 250 C, the austenite decomition temperature is 550~600, similar to that of lead bath quenching. When the flow state temperature is 300, the austenite temperature is about 500 C, which is lower than the lead bath quenching.

中型軋鋼車間生產(chǎn)的各種鋼材，經(jīng)軋鋼機(jī)軋制后由熱鋸機(jī)（或剪切機(jī)），切成定尺長度，還需要冷卻到常溫，再進(jìn)行矯直。軋制后的熱軋件冷卻時(shí)，由于連續(xù)生產(chǎn)，一般都是在緩慢的橫向移動過程中逐漸冷卻的。這種使軋件橫向移動并冷卻的設(shè)備，叫做冷床。

All kinds of steel produced in medium rolling mill are cut by hot saw (or shearing machine) after rolling mill, and it is cut into length of fixed length. It also needs to be cooled to normal temperature and then straightened. After rolling, the hot rolled parts are cooled down gradually because of continuous production. The equipment for rolling and cooling the workpiece is called cold bed.