The invention discloses a steel plate for
stamping and
quenching and a
thermoforming method of the steel plate. The steel plate comprises the following chemical components in percentage by weight: 0.14-0.28% of C, less than 0.40% of Si, 0.4-2.0% of Mn, less than or equal to 0.010% of P, less than or equal to 0.004% of S, 0.016-0.040% of Al, 0.15-0.8% of Cr, 0.015-0.12% of Ti, 0.0001-0.005% of B, less than or equal to 0.005% of N, and the balance of Fe and inevitable impurities. The
thermoforming method comprises the following steps: blanking by shearing the steel plate, and heating at Ac3 to (Ac3+80) DEG C to carry out austenization; after insulating for 5-10 minutes in the
heating furnace, immediately transferring the steel plate to a
metal mold the inside of which is cooled by introducing water, and
stamping at the high temperature of 650-850 DEG C; cooling the formed workpiece in the closed mold, and cooling the mold by
water circulation in the mold, wherein the
cooling rate is greater than the critical
cooling rate when
austenite forms
martensite, and the temperature of the workpiece leaving the
hot stamping production line is below 150 DEG C; and carrying out air-cooling to
room temperature. The steel plate has the advantages of
simple component system and favorable
hardenability; and the substrate tissues, which are ferrite and
pearlite, are processed by
hot stamping andquenching to obtain the all martensitic structure. The tensile strength of the steel plate can be higher than 1300 N / mm<2>.