公开(公告)号：US20160319405A1

公开(公告)日：2016-11-03

申请号：US15107966

申请日：2014-12-23

Applicant: SANDVIK INTELLECTUAL PROPERTY AB

Inventor： Linn LARSSON ,  Daniel GULLBERG ,  Ulf KIVISÄKK ,  Martin ÖSTLUND ,  Alexander Aleida Antonius SCHEERDER

IPC: C22C38/44 ,  B22F3/15 ,  C22C38/00 ,  C22C38/04 ,  C22C38/02 ,  C22C33/02 ,  C22C38/42

Abstract: The elementary composition of a Hot Isostatic Pressed ferritic-austenitic steel alloy includes, in percentages by weight: C 0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10; Mo 0-4.0; N 0.30-0.55; Cu 0-0.8; W 0-3.0; S 0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. Objects of the alloy can be useful in making components for a urea production plant that require processing such as machining or drilling, for example, in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.

公开(公告)号：US20180209022A1

公开(公告)日：2018-07-26

申请号：US15746006

申请日：2016-07-20

Applicant: SANDVIK INTELLECTUAL PROPERTY AB

Inventor： Daniel GULLBERG ,  Christina HARALDSSON ,  Anders WILSSON ,  Alexander SCHEERDER ,  Kirk OFEI

IPC: C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

CPC classification number: C22C38/44 ,  B01D3/32 ,  B01J19/02 ,  B01J2219/0286 ,  B22F3/15 ,  C07C273/04 ,  C21D6/004 ,  C21D8/005 ,  C21D8/105 ,  C21D9/08 ,  C21D2211/001 ,  C21D2211/005 ,  C22C33/0285 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/58 ,  F28F21/083 ,  Y02P10/122

Abstract: The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy), which is suitable for use in a plant for the production of urea and uses thereof. The disclosure also relates to objects made of the duplex stainless steel Furthermore, the present disclosure relates to a method for the production of urea and to a plant for the production of urea having one or more parts made from the duplex stainless steel, and to a method of modifying an existing plant for the production of urea.

公开(公告)号：US20240141466A1

公开(公告)日：2024-05-02

申请号：US18407928

申请日：2024-01-09

Applicant: Sandvik Intellectual Property AB

Inventor： Daniel GULLBERG ,  Christina HARALDSSON ,  Anders WILSON ,  Alexander SCHEERDER ,  Kirk OFEI

IPC: C22C38/44 ,  B01D3/32 ,  B01J19/02 ,  C07C273/04 ,  C21D6/00 ,  C21D8/00 ,  C21D9/08 ,  C22C33/02 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/58 ,  F28F21/08

CPC classification number: C22C38/44 ,  B01D3/32 ,  B01J19/02 ,  C07C273/04 ,  C21D6/004 ,  C21D8/005 ,  C21D9/08 ,  C22C33/0285 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/58 ,  F28F21/083 ,  B22F3/15 ,  C21D2211/001 ,  C21D2211/005

Abstract: A corrosion resistant duplex stainless steel (ferritic austenitic alloy) is suitable for use in a plant for the production of urea. Uses of the corrosion resistant duplex stainless steel include in objects made of said duplex stainless steel, in methods for the production of urea, in a plant for the production of urea comprising one or more parts made from said duplex stainless steel, and in methods of modifying an existing plant for the production of urea. In one aspect, the composition consists of in weight % (wt %): C 0.010 to 0.015; S 0.08 to 0.23; Mn 1.0 to 1.05; Cr 29.07 to 29.92; Ni 5.76 to 7.17; Mo 3.0 to 4.0; W max 2.55; N 0.3 to 0.35; Cu max 0.01; S max 0.008; P max 0.008; at least one of Ti, Nb, Hf, Ca, Ba, V, and B max 0.5 total; balance Fe and unavoidable occurring impurities.

公开(公告)号：US20220112585A1

公开(公告)日：2022-04-14

申请号：US17556607

申请日：2021-12-20

Applicant: Sandvik Intellectual Property AB

Inventor： Daniel GULLBERG ,  Christina HARALDSSON ,  Anders WILSON ,  Alexander SCHEERDER ,  Kirk OFEI

IPC: C22C38/44 ,  C07C273/04 ,  C22C38/00 ,  C22C33/02 ,  C21D6/00 ,  F28F21/08 ,  C22C38/58 ,  C22C33/04 ,  C21D9/08 ,  C22C38/02 ,  B01D3/32 ,  C22C38/04 ,  B01J19/02 ,  C22C38/42 ,  C21D8/00 ,  B22F3/15 ,  C21D8/10

Abstract: The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy) which is suitable for use in a plant for the production of urea and uses thereof. The disclosure also relates to objects made of said duplex stainless steel. Furthermore, the present disclosure relates to a method for the production of urea and to a plant for the production of urea having one or more parts made from the duplex stainless steel, and to a method of modifying an existing plant for the production of urea.

公开(公告)号：US20190168274A1

公开(公告)日：2019-06-06

申请号：US16313240

申请日：2017-06-30

Applicant: Sandvik Intellectual Property AB

Inventor： James SHIPLEY ,  Daniel GULLBERG ,  Robert MATTSSON

IPC: B21C37/15

Abstract: The present disclosure relates to a bimetallic tube comprising a first metallic tube having an inner diameter and an outer diameter, and a second metallic tube having an inner diameter and an outer diameter, wherein the first metallic tube is arranged within and force-fitted to the second metallic tube and wherein the first metallic tube comprises a zirconium (Zr) based alloy and wherein the second metallic tube comprises an austenitic stainless steel. The present disclosure also relates to a method for manufacturing a bimetallic tube comprising the steps of providing a first metallic tube having an inner diameter and an outer diameter, providing a second metallic tube having an inner diameter and an outer diameter, wherein the outer diameter of the first metallic tube is smaller than the inner diameter of the second tube, insetting the first metallic tube into the second metallic tube, cold-drawing the first and second metallic tubes together, such that the first and second metallic tubes are force-fitted together.