Production method for ultra-thick ship and ocean platform steel plate
An offshore platform and production method technology, applied in the field of steel plate production, can solve problems such as transverse cracks in billets, complex thermal processing technology, high cost, etc., and achieve the effects of high flatness, excellent mechanical properties, and high cleanliness
Inactive Publication Date: 2018-06-08
DALIAN YING YUN TECH
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Problems solved by technology
[0002] With the increasing development of the national economy, the extra-thick ship and offshore platform industry has become a pillar industry in my country. High-strength structural steel plates have been widely used in some key projects in my country. At present, the production of high-strength steel plates At present, micro-alloyed steel adopts controlled rolling and controlled cooling process is one of the main ways, in the current market situation, the price of steel plate is higher, the cost of alloying steel plate is higher, and, in the process of continuous casting of molten steel Transverse cracks are prone to occur, and the thermal processing process is very complicated
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[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0024] refer to figure 1 , a method for producing a steel plate for extra-thick ships and offshore platforms, comprising the following steps:
[0025] S1: First, pre-treat the required molten steel, remove excess impurities inside the molten steel through refining and smelting the molten steel, modulate the composition of the molten steel, and perform desiliconization and desulfurization treatment;
[0026] S2: After the molten steel pretreatment of S1, the slab forming process is carried out, wherein the weight percentage of the chemical composition of the slab is: C≤0.08%, Si≤0.03%, Mn≤0.40%, P≤0.020%, S≤0.025% , Al 0.020% ~ 0.070%, the balance is Fe and unavoidab...
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The invention discloses a production method for an ultra-thick ship and ocean platform steel plate. The production method comprises the following steps that firstly, needed molten steel is pretreated,unnecessary impurities in the molten steel are removed through molten steel refining and molten steel smelting, and components of the molten steel are subjected to blending treatment; desilicicationand desulfuration treatment is conducted; a steel plate obtained after slab forming is subjected to plate rolling operation, a formed packing material is taken out and placed on a plate frame, and a preparation is made for treatment of the next procedure; during placement on the plate frame, some powdery materials can be scattered on the plate frame to prevent the interaction between a slab and the plate frame, the slab on the plate frame is placed in acid liquid through a specific clamp to be subjected to acid pickling, and impurities on the surface of the slab are removed. According to the production method, the cleanliness of molten steel is higher, accordingly, the performance of the steel plate forming link is facilitated, the produced steel plate has excellent mechanical performance,and the purposes of optimizing the metallographic structure and the mechanical performance of the steel plate are achieved.
Description
technical field [0001] The invention relates to the technical field of steel plate production, in particular to a production method of extra-thick steel plates for ships and offshore platforms. Background technique [0002] With the increasing development of the national economy, the extra-thick ship and offshore platform industry has become a pillar industry in my country. High-strength structural steel plates have been widely used in some key projects in my country. At present, the production of high-strength steel plates At present, micro-alloyed steel adopts controlled rolling and controlled cooling process is one of the main ways, in the current market situation, the price of steel plate is higher, the cost of alloying steel plate is higher, and, in the process of continuous casting of molten steel It is easy to produce transverse cracks, and the thermal processing process is very complicated. Contents of the invention [0003] Based on the technical problems existing ...
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IPC IPC(8): C22C38/06C22C38/04C22C38/02C22C33/04B21C37/02C21D8/02
CPCC22C38/06B21C37/02C21D8/0205C21D8/0236C21D8/0273C21D8/0278C22C33/04C22C38/02C22C38/04
Inventor 郭彬王骁
Owner DALIAN YING YUN TECH