摘要:
Equipment for manufacturing stainless steel strip formed by arranging in order a double-drum continuous casting machine, a bridal roll- or pinch roll-containing atmosphere control cover, a hot rolling mill, a heat treatment furnace formed by a direct fire burner connected in the lengthwise direction of the furnace to header pipes arranged in parallel in the widthwise direction of the furnace, a cooler, and a take-up unit.
摘要:
A process for producing a steel strip having an excellent cast metal toughness from a thin cast chromium-containing stainless steel containing at least 0.05 % in total of niobium, titanium and aluminum, which process comprises casting a stainless steel containing 13-25 % of chromium and at least 0.05 % in total of one or more elements of niobium, titanium, aluminum and vanadium and having a gamma p value as will be defined below of 0 % or less into a thin metal with a thickness of 10 mm or less, hot-rolling immediately thereafter the thin metal in a temperature range of 1,150-950 DEG C at a draft of 5 % or above, conducting either slow cooling at a cooling rate of 20 DEG C/s or heat retention for at least 5 seconds in a temperature range of 1,150-950 DEG C, and winding up the resultant strip below 700 DEG C. gamma p(%) = 420C + 470N + 23Ni + 9Cu + 7Mn - 11.5Cr - 11,5Si - 12Mo - 23V - 47Nb - 49Ti - 52Al + 189 (element content in wt.%).
摘要:
A hot rolled Cr-Ni stainless steel plate of a low anisotropy having an aggregate structure in which the (100, 110, 111, 311 and 211) plane strengths in a reverse pole figure measured at the portion of 1/4 of a plate thickness is 0.5-1.5, which is manufactured by continuously casting a molten Cr-Ni stainless steel to a thin strip of 1.5-6 mm in thickness by a continuous casting machine in which wall surfaces of a casting mold are moved synchronously with the cast piece, carrying out a hot rolling, in which the hot-rolling temperature and the draft are set to 950 DEG -1150 DEG C and 25-35R respectively, within not more than 60 seconds after the cast piece has left the casting mold, and then carrying out a heat treatment for holding the resultant product for 5-60 seconds at a temperature in the range of 950 DEG -1200 DEG C. A method of manufacturing the same is also disclosed.