Method for predicting deformation penetration at bonding surface of asymmetric assembling rolling composite plate
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A technology for rolling clad and clad plates, which is applied in the direction of metal rolling, metal rolling, rolling mill control devices, etc., and can solve the problems of sufficient deformation penetration and unpredictability
Active Publication Date: 2020-02-21
SHOUGANG CORPORATION
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[0005] The embodiment of the present invention provides a method for predicting the deformation and penetration of the joint surface of the asymmetric billet rolled composite plate, which solves the problem of plate shape and thickness uniformity caused by the asymmetric billet group in the prior art, especially the rolling Whether the deformation and penetration at the joint surface of the composite plate assembly is sufficient or not is a technical problem that is difficult to predict during the process
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Embodiment 1
[0028] The embodiment of the present invention provides a method for predicting the deformation and penetration of the joint surface of the asymmetric billet rolled clad plate, please refer to Figure 1~6 , the method includes:
[0029] Step 1. Determine the rolling process parameters, the ratio of the upper and lower thicknesses of the composite slab blanks, and the physical performance parameters of the composite slab according to the actual composite slab stack rolling production situation;
[0030] Specifically, the composite rolling process parameters include the billet size of the composite plate group, the total thickness of the rolling target, the diameter of the roll 1 of the rolling mill, the length of the roll 1, the quality of the roll 1, the speed of the track, the rotation speed of the roll 1, etc., and determine the composite The ratio of the upper and lower thicknesses of the panel blanks, the specifications of the composite board substrate 2 and the doubler bo...
Embodiment 1
[0058] Regarding the first embodiment, the embodiment of the present application also provides an implementation method for predicting the deformation penetration at the joint surface of the asymmetric billet rolled clad plate, which specifically includes:
[0059] If measured, the billet size of the composite plate assembly is: 2700mm (length) × 2400mm (width) × 430mm (thickness); the rolling target total thickness is 100mm. The roll diameter of the rolling mill: Ф1120mm, the roll length: 4600mm; the mass of a single roll is 124t, the track speed is 1.2m / s, and the roll speed: 20.8r / min, the process parameters are as follows:
[0060] Table 1 The ratio of the upper and lower thicknesses of the composite panel blanks, the specifications of the composite panel substrate and doubler panels
[0061]
[0062] Using the finite element method to establish a 2D geometric model of the composite plate assembly, such as figure 2 , the finite element model after discretization of th...
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Abstract
The embodiment of the invention provides a method for predicting deformation penetration at a bonding surface of an asymmetric assembling rolling composite plate. The method comprises the following steps that performance parameters of the composite plate is determined according to actual conditions; a geometric model is established and subjected to discretization processing; the parameters are substituted into the model, and load and boundary conditions are applied to the model; a connection mode is selected according to the actual conditions; the model is solved through a finite element algorithm; a plastic strain distribution rule and a plastic strain value of each node are extracted; and a thickness ratio of the upper to lower of the composite plate is changed, and the above steps are repeated to obtain a plastic strain rule. The technical problem that in the prior art, the plate shape, the thickness uniformity and whether deformation penetration at the bonding surface is sufficiently are difficult to predict are solved. By adopting the finite element numerical simulation technology, the deformation penetration at the bonding surface of the asymmetric assembling rolling composite plate is subjected to regularity study, and the technical effect that whether the deformation penetration effect is achieved under the condition of assembling with different thickness proportions can be predicted is achieved.
Description
technical field [0001] The invention relates to the technical field of steel rolling technology, in particular to a method for predicting the deformation penetration at the junction surface of asymmetric billet rolled composite plates. Background technique [0002] As a new type of energy-saving and environmentally friendly materials, stainless steel and other double-metal clad steel plates are widely used in modern industries. Among them, the chemical and nuclear power industries mostly demand thick-gauge clad plates. However, due to the limitations of the size of the heating furnace and the opening of the rolling mill, The thickness of the composite plate that can be produced in the symmetrical stack rolling mode is severely limited (generally ≤40mm). In order to increase the thickness of the composite plate produced in the stack rolling mode, the researchers proposed the rolling method of asymmetric billet grouping, but the asymmetrical billet grouping brings problems suc...
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