초록 ▼

A method of producing clad steel plate comprises the steps of preparing an assembly slab by superposing a stainless-steel or nickel alloy cladding material onto base metal consisting essentially of, by weight, 0.020 to 0.06% carbon, 0.5% or less silicon, 1.0 to 1.8% manganese, 0.03% or less phosphor

A method of producing clad steel plate comprises the steps of preparing an assembly slab by superposing a stainless-steel or nickel alloy cladding material onto base metal consisting essentially of, by weight, 0.020 to 0.06% carbon, 0.5% or less silicon, 1.0 to 1.8% manganese, 0.03% or less phosphorus, 0.005% or less sulfur, 0.08 to 0.15% niobium, 0.005 to 0.03% titanium, 0.05% or less aluminum, 0.002 to 0.006% nitrogen, and one or two elements selected from among a group consisting of 0.05 to 1.0% nickel, 0.05 to 1.0% copper, 0.05 to 0.5% chromium, 0.05 to 0.3% molybdenum and 0.001 to 0.005% calcium, with the balance being iron and unavoidable impurities, and welding its periphery; heating the slab to 1100°to 1250°C.; rolling the slab at a reduction ratio of 5 or more and a rolling finish temperature of 900°to 1050°C.; air cooling for 60 to 200 seconds; cooling the slab from a temperature of at least 750°C. to 555°C. or below at a cooling rate of 5°to 40°C./sec, and following this by air cooling.

대표청구항 ▼

A method of producing clad steel plate comprising the steps of obtaining an assembly slab by superposing a stainless steel cladding material and a base metal consisting essentially of, by weight, ________________________________ -Carbon 0.020 to 0.06% Silicon 0.5% or less Manganese 1.0 to 1.8% Phosp

A method of producing clad steel plate comprising the steps of obtaining an assembly slab by superposing a stainless steel cladding material and a base metal consisting essentially of, by weight, ________________________________ -Carbon 0.020 to 0.06% Silicon 0.5% or less Manganese 1.0 to 1.8% Phosphorus 0.03% or less Sulfur 0.005% or less Niobium 0.08 to 0.15% Titanium 0.005 to 0.03% Aluminum 0.05% or less Nitrogen 0.002 to 0.006% ________________________________ with the balance being iron and unavoidable impurities; seal-welding the periphery of the assembly slab; heating the slab to a temperature in the range of 1100°to 1250°C.; rolling the slab at a reduction ratio of 5 or more; rolling the slab at a finish temperature of 900°to 1050°C.; air cooling the slab for 60 to 200 seconds to promote recrystallization of g750°to an arbitrary temperature of 550°or below at a cooling rate of 5°to 40°C./sec; and air cooling the slab.