PATENT CLAIM ANALYSIS

Application Number: 16066156
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2019-01
Patent Classification: ["148", "506000"]

Abstract:
A process of producing a duplex stainless steel tube comprises the steps of: a) producing an ingot or a continuous casted billet of said duplex stainless steel; b) hot extruding the ingot or the billet obtained from step a) into a tube; and c) cold rolling the tube obtained from step b) to a final dimension thereof.   The outer diameter D and the wall thickness t of the cold rolled tube is 50-250 mm respectively is 5-25 mm, and, for the cold rolling step, R and Q are set such that the following formula is satisfied: Rp0.2target=416.53+113.26·log  Q +4.0479·R+2694.9·C %−82.750·(log  Q ) 2 −0.04279·R 2 −2.2601·log  Q ·R+16.9·Cr %+26.1·Mo %+83.6·N %+Z  (1) wherein Rp0.2target is targeted yield strength and is 800-1100 MPa and 0<Q<3.6.

Claim (Index 1):
A process of producing a duplex stainless steel tube, said duplex stainless steel having the following composition (in weight %), C \u2003 0-0.3; Cr 22-26; Cu \u2003 0-0.5; Mn \u2003 0-1.2; Mo 3.0-4.0, N \u2003\u20090-0.35; Ni 5.0-7.0; Si 0.2-0.8; balance Fe and unavoidable impurities, said process comprising the steps of a) producing an ingot or a continuous casted billet of said duplex stainless steel; b) hot extruding the ingot or the billet obtained from step a) into a tube; and c) cold rolling the tube obtained from step b) to a final dimension thereof; wherein the outer diameter D and the wall thickness t of the cold rolled tube is 50-250 mm respectively is 5-25 mm, wherein, for the cold rolling step, R and Q are set such that the following formula is satisfied:\n Rp0.2target=416.53+113.26\u00b7log  Q+ 4.0479\u00b7R+2694.9\u00b7C %\u221282.750\u00b7(log  Q ) 2 \u22120.04279\u00b7R 2 \u22122.2601\u00b7log  Q \u00b7R+16.9\u00b7Cr %+26.1\u00b7Mo %+83.6\u00b7N %\u00b1Z\u2003\u2003(1) \n wherein Rp0.2target is targeted yield strength and is 800-1100 MPa,\n Q =( W 0\u2212 W 1)\u00d7(OD0\u2212 W 0)/ W 0((OD0\u2212 W 0)\u2212(OD1\u2212 W 1))\u2003\u2003(2) \n wherein W1 is tube wall thickness before cold rolling, W0 is tube wall thickness after cold rolling, OD1 is outer diameter of tube before cold rolling, and OD0 is outer diameter of tube after cold rolling, R is cold reduction and is defined as R = 1 - A \ue89e \ue89e 1 A \ue89e \ue89e 0 ( 3 ) wherein A1 is tube cross section area before cold rolling and A0 is tube cross section area after cold rolling Z=65, and wherein 0<Q<3.6.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 94.0
- Lexical Diversity: 1.74419
- Patent Class: 148.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['13184732', '15103357', '11991671', '13978743', '12667667']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7529137979677946
- 35 USC 102 Novelty (BERT): 0.4742141277433431
- Combined Prediction Score: 0.7250438309453494
- Mean Citation Score: 149.59310200000004
- Max Citation Score: 162.89345
- Similarity Product: 129.4426519112289

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test