Disclosed are a metallic nanoparticle cluster ink and a method for forming a conductive metal pattern using the cluster ink. The metallic nanoparticle cluster ink comprises colloidal metallic nanoparticles and a bifunctional compound. The conductive metal pattern is formed by forming a metallic nanoparticle pattern on a substrate using a mold made from PDMS (poly(dimethylsiloxane) polymer as a stamp, and heat-treating the substrate. Micrometer-sized conductive metal patterns can be easily formed on various substrates in a simple and inexpensive manner without the use of costly systems, thereby being very useful in various industrial fields.

Metallic nanoparticle cluster ink and method for forming metal pattern using the same

A novel hot-rolled ferritic steel composed of 70% or more of equiaxed ferrite grains having an ultra-fine grain size of 4 μm or less. This steel is produced by a hot working at approximately the Ar 3 point and by one or more passes of the hot working having a total reduction ratio of at least 75%. When a plurality of passes is carried out, the time between passes is less than one second. Due to hot working, dynamic transformation of austenite and/or dynamic recrystallization of ferrite takes place. The total reduction ratio may be at least 35% for a high purity steel.

Ferritic steel having ultra-fine grains and a method for producing the same

A galvanized steel sheet having (a) a dual phase microstructure with a martensite phase and a ferrite phase and (b) a composition containing by percent weight: carbon in a range from about 0.01% to about 0.18%; manganese in a range from about 0.2% to about 3%; silicon ≦ about 1.2%; aluminum in a range from about 0.01% to about 0.1%; one or both of chromium and nickel in a range from about 0.1% to about 3.5%; calcium in a range from about 0.0003% to about 0.01%; phosphorus ≦ about 0.01%; sulfur ≦ about 0.03%; nitrogen ≦ about 0.02%; molybdenum ≦ about 1%; copper ≦ about 0.8%; one or more of niobium, titanium, and vanadium ≦ about 1%; and boron ≦ about 0.006% by weight; and with the balance of the composition being iron and incidental ingredients. In one embodiment, the steel sheet is both galvanized and galvannealed.

High strength, hot dip coated, dual phase, steel sheet and method of manufacturing same

An object of the present invention is to provide a high tensile strength galvanized steel sheet having sufficiently high strength and excellent formability (elongation and stretch-flange ability), as well as a method for manufacturing the galvanized steel sheet. Specifically, the present invention provides a high tensile strength galvanized steel sheet having tensile strength of at least 980 MPa and excellent formability, comprising: a hot rolled steel sheet having (i) a composition including by mass %, C: 0.07% to 0.13% (inclusive of 0.07% and 0.13%), Si: 0.3% or less, Mn: 0.5% to 2.0% (inclusive of 0.5% and 2.0%), P: 0.025% or less, S: 0.005% or less, N: 0.0060% or less, Al: 0.06% or less, Ti: 0.10% to 0.14% (inclusive of 0.10% and 0.14%), V: 0.15% to 0.30% (inclusive of 0.15% and 0.30%), Solute V: 0.04% to 0.1% (inclusive of 0.04% and 0.1%), Solute Ti: 0.05% or less, and remainder as Fe and incidental impurities, (ii) microstructure with fine carbides dispersion precipitated therein, the fine carbides containing Ti and V and having the average particle diameter of less than 10 nm, as well as volume ratio with respect to the entire microstructure of at least 0.007, and (iii) matrix as ferrite phase having area ratio with respect to the entire microstructure of at least 97%; and hot-dip galvanized coating or galvannealed coating formed on a surface of the hot rolled steel sheet, wherein contents of C, Ti, V, S and N satisfy formula (1) Ti ≥0.10 + (N/14 * 48 + S/32 * 48) and formula (2) 0.8 ≤ (Ti/48 + V/51)/(C/12) ≤1.2.

Hot-dip galvanized steel sheet with high tensile strength and superior processability and method for producing same

IRON-BASED SHAPE-MEMORY ALLOY EXCELLENT IN SHAPE-MEMORY PROPERTY AND CORROSION RESISTANCE ABSTRACT OF THE DISCLOSURE An iron-based shape-memory alloy excellent in a shape-memory property and a corrosion resistance, consisting essentially of: chromium : from 0.1 to 5.0 wt.%, silicon : from 2.0 to 8.0 wt.%, manganese : from 1.0 to 14.8 wt.%, at least one element selected from the group consisting of: nickel : from 0.1 to 20.0 wt.%, cobalt : from 0.1 to 30.0 wt.%, copper : from 0.1 to 3.0 wt.%, and nitrogen : from 0.001 to 0.400 wt.%, where, Ni + 0.5 Mn + 0.4 Co + 0.06 Cu + 0.002 N ? 0.67 (Cr + 1.2 Si), and the balance being iron and incidental impurities.

Iron-based shape-memory alloy excellent in shape-memory property and corrosion resistance

This invention is directed to a method and to the resulting product, wherein said product is a low-carbon dual phase steel having a combination of high strength, good ductility and a YS/TS ratio ≦0.6. The method includes the steps of (1) preparing an Al-killed steel consisting essentially of 0.05 to 0.15 wt. % C, up to 2.0 wt. % Mn, up to 1.0 wt. % Si, 0.03 to 0.15 wt. % V and a sufficient amount of titanium to "getter" the excess sulfur and nitrogen, with the balance essentially being iron, where the titanium addition should be at least equal to the atomic percent of the sulfur plus nitrogen, but no more than about 1.6 times, (2) intercritically annealing such steel within the α+γ temperature range, and (3) cooling to room temperature.

Titanium and vanadium dual-phase steel and method of manufacture

This invention relates to an as-worked bainitic ferrous alloy and to a novel method of processing same to obtain optimum strength and toughness. More particularly, this invention is directed to the hot working cycle of a ferrous alloy characterized by an I-T Diagram or "S" Curve having a double nose or a pearlite transformation knee of the beginning curve above a broad bainitic bay region. Such an alloys is heated to an austenitizing temperature of about 1,500 DEG to 2,200 DEG F., and subjected to a plurality of working operations at successively lower temperatures, where the final working operation is conducted after the beginning of the austenite transformation to bainite and before the complete transformation thereof.

Bainitic ferrous alloy and method

THIS INVENTION RELATES TO AN AS-WORKED BIANITIC FERROUS ALLOY AND TO A NOVEL METHOD OF PROCESSING SAME TO OBTAIN OPTIMUM STRENGTH AND TOUGHNESS. MORE PARTICULARLY, THIS INVENTION IS DIRECTED TO THE HOT WORKING CYCLE OF A FERROUS ALLOY CHARACTERIZED BY AN I-T DIAGRAM OR S CURVE HAVING A DOUBLE NOSE OR A PEARLITE TRANSFORMATION KNEE OF THE BEGINNING CURVE ABOVE A BROAD BIANITIC BAY REGION. SUCH AN ALLOY IS HEATED TO AN AUSTENITIZING TEMPERATURE OF ABOUT 1500* TO 2200*F., AND SUBJECTED TO A PLURALITY OF WORKING OPERATIONS AT SUCCESSIVELY LOWER TEMPERATURES, WHERE THE FINAL WORKING OPERATION IS CONDUCTED AFTER THE BEGINNING OF THE AUSTENITE TRANSFORMATION TO BAINITE AND BEFORE THE COMPLETE TRANSFORMATION THEREOF.

As-worked bainitic ferrous alloy and method

An iron-aluminum ferritic alloy characterized by high-temperature strength, resulting from the precipitation of a fine TiSi intermetallic type precipitate of high thermal stability, and high-temperature oxidation-resistance under conditions of cyclic heating at temperatures up to about 2,500 DEG F. said alloy consists essentially of, by weight, up to about 0.1% carbon, from about 4.0 to about 8.2% aluminum, about 0.2 to 4.0% silicon, about 0.05 to 2.0% titanium, with a preferred silicon/titanium ratio between about 1.0 to 4.0, and the balance iron, incidental impurities and additions which do not materially affect the attainment of the desired properties.

Ferritic alloy with high temperature strength containing dispersed intermetallic TiSi

THIS INVENTION RELATES TO A FERROUS ALLOY AND A METHOD FOR IMPROVING THE STRENGTH AND NOTCH TOUGHNESS OF A FERROUS ALLOY CONTAINING BY WEIGHT UP TO ABOUT 035% CARBON, A TOTAL UP TO ABOUT 3% OF OTHER ELEMENTS, BALANCE IRON MORE PARTICULARLY, SAID INVENTION IS PREDICATED ON THE DISCOVERY THAT BY CONTROLLING THE REDUCTION ASPECTS OF THE CONTINUOUS THERMAL MECHANICAL TREATMENT SCHEDULE THROUGH THE AUSTENITE, AUSTENITE-FERRITE, AND FERRITE REGIONS, A HIGHLY TEXTURED FERROUS ALLOY RESULTS HAVNG IMPROVED PROPERTIES

Arnold R Marder

Papers

Titanium and vanadium dual-phase steel and method of manufacture

Bainitic ferrous alloy and method

As-worked bainitic ferrous alloy and method

Ferritic alloy with high temperature strength containing dispersed intermetallic TiSi

Rolled ferrite-pearlite alloy plate and method of processing same