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鋼板在后期加工時，會因為翹曲導(dǎo)致切割后變形，造成工件報廢，影響用戶正常使用，同時造成企業(yè)經(jīng)濟(jì)損失。分析認(rèn)為鋼板經(jīng)熱軋后內(nèi)部及上下表面存在殘余應(yīng)力，如果殘余應(yīng)力沿鋼板寬度和長度方向呈不均勻分布，將會對鋼板截面產(chǎn)生一個力矩，使鋼板在分切后發(fā)生翹曲?？刂拼胧┦牵?/p>

When the steel plate is processed in the later period, the deformation will be caused by the warping, which causes the work piece to be scrapped, which affects the normal use of the user and causes the economic loss of the enterprise. It is considered that there is residual stress in the inner and upper surface of the steel plate after hot rolling. If the residual stress is uneven distributed along the width and length of the steel plate, it will produce a torque on the section of the steel plate, causing the steel plate to warp after cutting. The control measures are:

1、由于采用超快速冷卻，提高了形核率，細(xì)化了鐵素體晶粒。保持超快冷狀態(tài)到相變點(diǎn)附近停止冷卻，隨后進(jìn)行冷卻路徑控制，得到優(yōu)良性能的鋼板。

1. Due to the use of ultra fast cooling, the nucleation rate was improved and ferrite grain was refined. The super fast cold state is kept near the phase transition point to stop cooling, and then the cooling path is controlled to get the excellent performance steel plate.

2、冷卻溫度

2. Cooling temperature

層流冷卻造成的內(nèi)應(yīng)力不均衡問題主要是由3種不均勻冷卻導(dǎo)致: 橫向冷卻嚴(yán)重不均勻;厚度方向冷卻不對稱;橫向和厚度方向冷卻不均勻混合。

The problem of internal stress imbalance caused by laminar cooling is mainly caused by 3 kinds of non-uniform cooling: severe non-uniform cross cooling, asymmetric thickness direction, uneven cooling in transverse direction and thickness direction.

3、冷矯直

3. Cold straightening

矯直能改善鋼板殘余應(yīng)力分布，當(dāng)鋼板在橫斷面上有應(yīng)力分布不均時，可以需要采取彎輥措施以增加局部變形的方法來補(bǔ)償縱向纖維的長短不齊，達(dá)到消除波浪彎、均勻化鋼板內(nèi)應(yīng)力的目的。

The straightening plate can improve the residual stress distribution, when the steel plate is uneven stress distribution in cross section, may need to take measures to increase the bending method of local deformation to compensate for the uneven length of longitudinal fibers, to eliminate the wave bending and uniform stress to steel plate.

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