公开(公告)号：US20180127858A1

公开(公告)日：2018-05-10

申请号：US15570574

申请日：2016-04-29

Applicant: APERAM

Inventor： Francis Chassagne ,  Françoise Haegeli

IPC: C22C38/50 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C21D9/46 ,  C21D8/12 ,  C21D6/00 ,  C21D7/02 ,  C21C5/00

CPC classification number: C22C38/50 ,  C21C5/005 ,  C21C7/0685 ,  C21D6/002 ,  C21D7/02 ,  C21D8/1222 ,  C21D9/18 ,  C21D9/46 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48

Abstract: Martensitic stainless steel, characterized in that its composition consists of, in percentages by weight: 0.10%≤C≤0.45%; traces≤Mn≤1.0%; traces≤Si≤1.0%; traces≤S≤0.01%; traces≤P≤0.04%; 15.0%≤Cr≤18.%; traces≤Ni≤0.50%; traces≤Mo≤0.50%; traces≤Cu≤0.50%; traces≤V≤0.50%; traces≤Nb≤0.03%; traces≤Ti≤0.03%; traces≤Zr≤0.03%; traces≤Al≤0.010%; traces≤O≤0.0080%; traces≤Pb≤0.02%; traces≤Bi≤0.02%; traces≤Sn≤0.02%; 0.10%≤N≤0.20%; C+N≥0.25%; Cr+16N−5C≥16.0%; preferably 17Cr+500C+500N≤570%;the rest being iron and impurities resulting from the development.A method for the production of a semi-finished product from this martensitic stainless steel, and cutting tool produced from this semi-finished product.

公开(公告)号：US20180169739A1

公开(公告)日：2018-06-21

申请号：US15735535

申请日：2015-06-10

Applicant: APERAM

Inventor： Didier Vil ,  Jean Michel Damasse ,  Françoise Haegeli

IPC: B21H8/00 ,  B21B1/22 ,  B21B3/02

Abstract: A rolled stainless steel object has surface with a raised and indented pattern including a random juxtaposition of at least two types of polygons. Each of the polygons has at least three sides, and is made up of substantially parallel rectilinear scratches, having a depth of from 5 to 30 μm separated by ridge lines, the axes of which are from 0.1 to 0.3 mm from each other, and a Fourier transform spectral analysis of which, carried out on a square of at least 100 mm2, shows that they have an isotropy of at least 40% between the rolling direction and the sideways direction, and two adjacent preferred angular orientations of which scratches, from among the three main preferred angular orientations thereof, are spaced apart by a minimum of 20° and a maximum of 60°.

公开(公告)号：US10744553B2

公开(公告)日：2020-08-18

申请号：US15735535

申请日：2015-06-10

Applicant: APERAM

Inventor： Didier Vil ,  Jean Michel Damasse ,  Françoise Haegeli

IPC: B21B1/22 ,  B21H8/00 ,  B21B3/02

Abstract: A rolled stainless steel object has surface with a raised and indented pattern including a random juxtaposition of at least two types of polygons. Each of the polygons has at least three sides, and is made up of substantially parallel rectilinear scratches, having a depth of from 5 to 30 μm separated by ridge lines, the axes of which are from 0.1 to 0.3 mm from each other, and a Fourier transform spectral analysis of which, carried out on a square of at least 100 mm2, shows that they have an isotropy of at least 40% between the rolling direction and the sideways direction, and two adjacent preferred angular orientations of which scratches, from among the three main preferred angular orientations thereof, are spaced apart by a minimum of 20° and a maximum of 60°.