Austenite stainless steel material, method for producing same, and designed articles
An austenite stainless steel material includes, on a mass basis, 0.024% or less of C, 1.00% or less of Si, 2.00% or less of Mn, 0.045% or less of P, 0.015% or less of S, 10.0 to 15.0% of Ni, 15.0 to 22.0% of Cr, 2.0 to 4.0% of Mo, 0.01 to 0.15% of N, 0.001 to 0.010% of B, 0.05 to 1.00% of Co, 0.01 to 0.30% of V, 0.01 to 0.30% of W, the balance being Fe and impurities.
1 . An austenite stainless steel material comprising, on a mass basis, 0.024% or less of C, 1.00% or less of Si, 2.00% or less of Mn, 0.045% or less of P, 0.015% or less of S, 10.3 to 15.0% of Ni, 15.0 to 22.0% of Cr, 2.0 to 4.0% of Mo, 0.01 to 0.15% of N, 0.001 to 0.010% of B, 0.05 to 1.00% of Co, 0.01 to 0.30% of V, 0.01 to 0.25% of W, the balance being Fe and impurities,
wherein the austenite stainless steel material has a cutting resistance value of 270 N or less,
wherein the austenite stainless steel material has a glossiness Gs (20°) of 1000% or more after mirror polishing, and
wherein the austenite stainless steel material has a comparative abrasion quantity of 60×10 −5 mm 3/ N·m or less in a pin-on-disk abrasion test.
2 . The austenite stainless steel material according to claim 1 , wherein the austenite stainless steel material satisfies the following equation (1):
5
W
+
2
V
+
0.45
-
Co
≥
0
(
1
)
in which a symbol of each element represents a content in % by mass of each element.
3 . The austenite stainless steel material according to claim 1 , wherein the austenite stainless steel material has a total amount of C and N of less than 0.080% by mass.
4 . The austenite stainless steel material according to claim 1 , wherein the austenite stainless steel material has a metal structure comprising 0 to 2.0% by volume of δ ferrite phase.
5 . The austenite stainless steel material according to claim 1 , further comprising one or more selected from Al: 0.03% or less and Ca: 0.006% or less on a mass basis.
6 . A designable article comprising the austenite stainless steel material according to claim 1 .
7 . A method for producing an austenite stainless steel material, the method comprising subjecting a slab to hot rolling by heating it at a temperature of 1230 to 1300° C., wherein the slab comprises, on a mass basis, 0.024% or less of C, 1.00% or less of Si, 2.00% or less of Mn, 0.045% or less of P, 0.015% or less of S, 10.3 to 15.0% of Ni, 15.0 to 22.0% of Cr, 2.0 to 4.0% of Mo, 0.01 to 0.15% of N, 0.001 to 0.010% of B, 0.05 to 1.00% of Co, 0.01 to 0.30% of V, 0.01 to 0.25% of W, the balance being Fe and impurities, and wherein the slab has 0 to 3.0% by volume of δ ferrite phase at a depth of 5 mm from a surface of the slab in a thickness direction,
wherein the austenite stainless steel material has a cutting resistance value of 270 N or less,
wherein the austenite stainless steel material has a glossiness Gs) (20°) of 1000% or more after mirror polishing, and
wherein the austenite stainless steel material has a comparative abrasion quantity of 60×10 −5 mm 3/ N·m or less in a pin-on-disk abrasion test.
8 . The method for producing an austenite stainless steel material according to claim 7 , wherein the slab satisfies the following equation (1):
5
W
+
2
V
+
0.45
-
Co
≥
0
(
1
)
in which a symbol of each element represents a content (% by mass) of each element.
9 . The method for producing an austenite stainless steel material according to claim 7 , wherein the slab has a total amount of C and N of less than 0.080% by mass.