Cooling process for reducing work hardening effect of titanium micro-alloying high-strength steel
A technology of microalloying and cooling process, which is applied in the field of steelmaking, can solve the problems of weakening work hardening effect and reducing the work hardening effect of titanium microalloyed high-strength steel, so as to achieve weakening work hardening effect, reduce cold deformation work hardening rate, The effect of dislocation state reduction
Active Publication Date: 2017-05-24
SHOUGANG CORPORATION
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Problems solved by technology
[0004] The invention provides a cooling process for reducing the work hardening effect of titanium microalloyed high-strength steel, which solves or partially solves the technical problems in the prior art that the steel plate has significant work hardening after cold working, the strength is greatly increased and the plasticity is greatly reduced. After cold working, the work hardening effect of the material is weakened, and the technical effect of improving the plasticity index of the cold deformed metal is realized.
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[0016] The embodiment of the present application provides a cooling process to reduce the effect of work hardening of titanium microalloyed high-strength steel, which solves or partially solves the technology in the prior art that the steel plate has significant work hardening after cold working, the strength is greatly improved and the plasticity is greatly reduced Problem, by setting the air-cooling process between the finishing rolling and the water-cooling process in the production process of the hot-rolled strip steel coil, and reasonably setting the air-cooling time and the end temperature of the air-cooling, and reasonably setting the target temperature of the water-cooling; after the cold processing, The work hardening effect of the material is weakened, and the technical effect of improving the plastic index of the cold deformed metal is achieved.
[0017] See attached figure 1 A cooling process for reducing the work hardening effect of titanium micro-alloyed high-str...
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Abstract
The invention relates to a cooling process for reducing the work hardening effect of titanium micro-alloying high-strength steel. The cooling process comprises the following steps that after finish rolling is completed, band steel is subjected to air cooling for 10-20 s; when air cooling is finished, the temperature of the band steel is 650-750 DEG C; and after air cooling is finished, the band steel is subjected to water cooling to reach the target temperature, and the target temperature is 610-640 DEG C. According to the cooling process for reducing the work hardening effect of the titanium micro-alloying high-strength steel, after cold working is conducted, the material work hardening effect is weakened, and the plasticity index of cold-deformation metal is increased.
Description
technical field [0001] The invention relates to the technical field of steelmaking, in particular to a cooling process for reducing the work hardening effect of titanium microalloyed high-strength steel. Background technique [0002] With the rapid development of microalloying technology and controlled cooling technology, Ti microalloyed high-strength steel has been widely used, and its strength level can cover 500MPa-900MPa. The main material characteristic of Ti microalloyed high-strength steel is that the microstructure matrix is dominated by fine and uniform ferrite, and a large number of dispersed fine Ti precipitates are distributed on the matrix. Ti microalloyed high-strength steel has a high yield ratio, generally above 0.9. In addition, another characteristic of Ti microalloyed high-strength steel is that the work hardening effect is remarkable. After cold deformation, the strength of the material is greatly increased, while the plasticity is significantly reduce...
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Login to View More IPC IPC(8): C21D8/02C22C38/04C22C38/02C22C38/12C22C38/14
CPCC21D8/0247C21D2211/005C22C38/02C22C38/04C22C38/12C22C38/14
Inventor 潘辉崔阳田志红惠亚军姚志强郭佳刘锟
Owner SHOUGANG CORPORATION