35results about How to "To achieve the purpose of supply" patented technology

The invention relates to high-strength thin strip steel for cold forming and a manufacturing method thereof. The manufacturing method comprises the following steps: performing uniform enhanced cooling on a cast strip by adopting a high-pressure dry ice spraying way after the cast strip is discharged from a crystallization roller, thus rapidly cooling the cast strip to below 1280 DEG C, wherein the cooling rate is 200-300 DEG C / s, and by adopting the cooling way of the strip steel after boron treatment, the precipitation of coarse BN (boron nitride) can be promoted, the appearance of low-melting point phase B2O3 and the precipitation of fine AlN can be prevented and the purposes of uniformizing austenite grains and reducing yield ratio are achieved; then performing austenite online recrystallization rolling; cooling the strip steel after hot rolling by atomization cooling, wherein the cooling rate of atomization cooling is 10-70 DEG C / s; coiling at the temperature of 650-750 DEG C. Through the manufacturing method provided by the invention, the high-strength thin strip steel for cold forming of an automobile, which has relatively low yield ratio and excellent stamping performance, can be obtained. The high-strength hot-rolled thin strip steel for cold forming, which is produced by the method, can be directly used for replacing cold-rolled steel with the hot-rolled steel, cancel a cold rolling process step and greatly reduce production cost.

The invention relates to high-strength thin band steel for cold forming and a manufacturing method thereof. The method comprises the following steps: after discharging a cast band from a crystal roll, cooling the cast band forcibly and uniformly in a mode of spraying dry ice under high pressure; quickly cooling the cast band to be below 1,280 DEG C at the cooling speed of 200-300 DEG C / s; performing austenite on-line recrystallization rolling, wherein the rolling temperature is 1,050 to 1,200 DEG C and the rolling reduction is 20 to 50 percent; and quickly cooling the band steel subjected to hot rolling in an anti-oxidation mode, wherein the anti-oxidation quick cooling speed is 80 to 200 DEG C / s and the reeling temperature is 500 to 600 DEG C. By the method, the high-strength thin band steel for automobile cold forming and with low yield strength and excellent stamping performance can be obtained, can be directly used in a mode of substituting heat for cold, cancels the cold rolling procedure and greatly reduces the production cost.

The invention discloses a steel strip for a thin-wall oil bucket and a manufacturing method thereof. The manufacturing method comprises the following steps: casting a crystal roller from a cast strip by using a thin strip casting process, subsequently uniformly reinforcing and cooling the cast strip in a mode that dry ice is sprayed at a high pressure, and rapidly cooling the cast strip to be less than 1,280 DEG C, wherein the cooling velocity is 200-300 DEG C / s; when the steel strip is subjected to boron treatment in such a mode, large boron nitride separation is prompted, occurrence of low-melting-point phase B2O3 and separation of fine AlN are prevented, and the purposes of uniformly austenite grains and reducing the yield ratio are achieved; subsequently performing on-line recrystallization and rolling on the austenite; subsequently atomizing and cooling so as to cool down the hot-rolled steel strip; finally coiling the steel strip. By adopting the manufacturing method, the thin-wall with low yield ratio and excellent stamping property for the thin-wall oil bucket is manufactured. The hot-rolled steel strip for the thin-wall oil bucket can be used in hotness instead of coldness, and a cold-rolling procedure is omitted, so that the production cost is greatly lowered.