PROBLEM TO BE SOLVED: To provide a method for manufacturing a cold rolled steel sheet for deep drawing, excellent in the uniformity of material quality and useful in the field of manufacture of industrial products such as electrical appliances and automobiles. ;SOLUTION: At the time of hot rolling a steel slab containing, by mass, ≤0.01% C and prescribed amounts of one or two kinds of Ti and Nb, at least one pass at finish rolling is rolled in a temperature region lower than the Ar3 transformation point so that the sum of hot rolling rates under the conditions of a temperature and lubrication becomes ≥50%, while applying the lubrication to be supplied to rolls, where lubricating oil having 450 mm2/s viscosity at 40°C is adjusted, if necessary, to 30 to 80°C, an injection pressure is adjusted, if necessary, to 0.05 to 2.0 MPa by means of a water injection system, and further, the amount of the oil is adjusted, if necessary, to (0.2 to 10) ml/m2. Subsequently, recrystallization treatment is applied in a coiling stage or an annealing stage. After pickling, cold rolling is performed at a 50 to 95% rolling rate, and further, recrystallization annealing is applied to the resultant steel sheet at 650 to 920°C.;COPYRIGHT: (C)1999,JPO
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机译：解决的问题：提供一种用于深冲的冷轧钢板的制造方法，该方法具有优异的材料质量均匀性并且在工业产品的制造领域中有用，例如电器和汽车。 ;解决方案：在热轧时，按质量计≤0.01％C和规定量的Ti和Nb的一种或两种的钢坯在精轧时至少轧制一次。 Ar 3 的转变点，使得在施加润滑的轧辊上，在温度和润滑条件下的热轧率之和≥50％，其中<450 mm <如果需要，可将40°C下的Sup> 2 / s粘度调节至30至<80°C，并通过注水系统将注射压力调节至0.05至<2.0 MPa。 ，此外，根据需要将油量调整为（0.2至10）ml / m 2 。随后，在卷取阶段或退火阶段进行重结晶处理。酸洗后，以50〜95％的轧制率进行冷轧，进而在650〜920℃下对得到的钢板进行再结晶退火。COPYRIGHT：（C）1999，JPO
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