34results about How to "High r value" patented technology

In certain example embodiments of this invention, a window unit may include a vacuum IG (VIG) unit as an inboard lite and a monolithic lite (e.g., with an optional low-E coating thereon) as an outboard lite. A dead air space may separate the inboard and outboard lites. A highly insulated frame may be used to support the inner and outer lites. The VIG unit may be partially embedded or supported in the insulative frame, so that the insulating frame separates the VIG unit inboard lite from the outboard lite thereby reducing conductivity around the edges of the window unit so that R-value can be increased (and U-value decreased). In certain example embodiments, the total R-value of the window unit is at least about R-8, and more preferably at least about R-10 (compared to the much lower R-values of conventional IG units).

An improved building roof tile for a sloping roof including a polyurethane foam tile that includes outer coating layers that are made of a uniquely fire resistant or retardant layered system that includes a first outer fire resistant layer of 100% solid aliphatic polyurea material and a second inner layer of an 100% solid intumescent non-halogenated phosphate material, said inner layer forming a fire blocking partition and said outer layer offering UV protection, featherweight, category 5 hurricane proof, yields a high R-value, offer low thermal transference into attic space, will retrofit any sloped roof without structural build-up, can be molded into single or triple units, cannot break under foot or when extreme pressures are applied, can produce upgradable solar energy, is easy to transport and install and can molded to look like slate, wood, flat roll tile or most other historical tiles.

In certain example embodiments of this invention, a window unit may include a vacuum IG (VIG) unit as an inboard lite and a monolithic lite (e.g., with an optional low-E coating thereon) as an outboard lite. A dead air space may separate the inboard and outboard lites. A highly insulated frame may be used to support the inner and outer lites. The VIG unit may be partially embedded or supported in the insulative frame, so that the insulating frame separates the VIG unit inboard lite from the outboard lite thereby reducing conductivity around the edges of the window unit so that R-value can be increased (and U-value decreased). In certain example embodiments, the total R-value of the window unit is at least about R-8, and more preferably at least about R-10 (compared to the much lower R-values of conventional IG units).

A high-strength galvanized steel sheet contains C: 0.010% or more and 0.06% or less, Si: more than 0.5% and 1.5% or less, Mn: 1.0% or more and 3.0% or less, P: 0.005% or more and 0.1% or less, S: 0.01% or less, sol.Al: 0.005% or more and 0.5% or less, N: 0.01% or less, Nb: 0.010% or more and 0.090% or less, and Ti: 0.015% or more and 0.15% or less, on a mass percent basis. The Nb and C contents of the steel satisfy the relation of (Nb / 93) / (C / 12)<0.20. C* satisfies 0.005≦C*≦0.025. Ferrite constitutes 70% by area ratio or more of the steel sheet. Martensite constitutes 3% by area ratio or more of the steel sheet. C*=C−(12 / 93)Nb−(12 / 48){Ti−(48 / 14)N}, wherein C, Nb, Ti, and N denote the C, Nb, Ti, and N contents of the steel.

A low-density, high-strength concrete composition that is both self-compacting and lightweight, with a low weight-fraction of aggregate to total dry raw materials, and a highly-homogenous distribution of a non-absorptive and closed-cell lightweight aggregate such as glass microspheres or copolymer polymer beads or a combination thereof, and the steps of providing the composition or components. Lightweight concretes formed therefrom have low density, high strength-to-weight ratios, and high R-value. The concrete has strength similar to that ordinarily found in structural lightweight concrete but at an oven-dried density as low as 40 lbs. / cu.ft. The concrete, at the density ordinarily found in structural lightweight concrete, has a higher strength and, at the strength ordinarily found in structural lightweight concrete, a lower density. Such strength-to-density ratios range approximately from above 30 cu.ft / sq.in. to above 110 cu.ft / sq.in., with a 28-day compressive strength ranging from about 3400 to 8000 psi.

A low-density, high-strength concrete composition that is both self-compacting and lightweight, with a low weight-fraction of aggregate to total dry raw materials, and a highly-homogenous distribution of a non-absorptive and closed-cell lightweight aggregate such as glass microspheres or copolymer polymer beads or a combination thereof, and the steps of providing the composition or components. Lightweight concretes formed therefrom have low density, high strength-to-weight ratios, and high R-value. The concrete has strength similar to that ordinarily found in structural lightweight concrete but at an oven-dried density as low as 40 lbs. / cu.ft. The concrete, at the density ordinarily found in structural lightweight concrete, has a higher strength and, at the strength ordinarily found in structural lightweight concrete, a lower density. Such strength-to-density ratios range approximately from above 30 cu.ft / sq.in. to above 110 cu.ft / sq.in., with a 28-day compressive strength ranging from about 3400 to 8000 psi.

A low-density, high-strength concrete composition that is lightweight and self-compacting or non-self-compacting, with a low weight-fraction of aggregate to total dry raw materials, and a highly-homogenous distribution of a non-absorptive and closed-cell lightweight aggregate such as glass microspheres or copolymer polymer beads or a combination thereof, and the steps of providing the composition or components. Lightweight concretes formed therefrom have low density, high strength-to-weight ratios, and high R-value. The concrete has strength similar to that ordinarily found in structural lightweight concrete but at a lower density, such as an oven-dried density as low as 40 lbs. / cu.ft. Such strength-to-density ratios range approximately from above 30 cu.ft / sq.in. to above 110 cu.ft / sq.in., with a 28-day compressive strength ranging from about 3400 to 8000 psi.

The invention discloses IF steel and a preparing method thereof, and belongs to the field of metal material machining. The IF steel comprises chemical components including, by mass percent, 0%-0.0030% of C, 0.05%-0.5% of Mn, 0.01%-0.08% of Al, 0.01%-0.06% of Nb, 0.01%-0.06% of Ti, comprises limited elements including, by mass percent, smaller than or equal to 0.06% of Si, smaller than or equal to 0.02% of P, smaller than or equal to 0.01% of S, smaller than or equal to 0.005% of N, and the balance Fe. According to the IF steel and the preparing method thereof, the obtained IF steel has low yield strength and high r value.

Disclosed are ferrite stainless steel having an excellent ridging property and surface quality of a final product by changing a microstructure of a central portion of a cross section by further performing cold rolling before a heat treatment of hot-rolling annealing, and a manufacturing method therefor. Austenitic stainless steel according to the present invention comprises, in percentage by weight: 0.005 to 0.1% of C; 0.01 to 2.0% of Si; 0.01 to 1.5% of Mn; 0.05% or less of P; 0.005% or less of P; 10 to 30% of Cr; 0.005 to 0.1% of N; 0.005 to 0.2% of Al; and the balance being Fe and other unavoidable impurities, in which max is 20% or more and less than 50%, and a fine groove area ratio of a surface is 2.0% or less.

An attic-insulation cover designed to cover access doors leading into attic spaces, such as scuttle holes and vertical attic doors includes an attic insulation flange or border for placement over the attic opening frame, the attic insulation flange having a first top end and a second bottom end, an attic insulation jacket having a top wall, parallel side walls, parallel end walls and a bottom panel; and a closure device at the second bottom end of the attic-insulation flange for connecting the attic insulation flange and the attic insulation jacket.

The invention discloses 260MPa-grade hot-dip galvanized high-strength IF steel and a preparation method thereof, and belongs to the technical field of steel manufacturing. The IF steel comprises the following chemical components in percentage by weight of 0.0008 to 0.003% of C, 0.06 to 0.10% of Si, 0.60 to 0.70% of Mn, 0.06 to 0.075% of P, 0.01 to 0.02% of Nb, 0.015 to 0.025% of Ti, 0.020 to 0.045% of Als, less than 0.003% of a limiting element S, less than 0.003% of N, and the balance being Fe. According to the 260MPa-grade hot-galvanized high-strength IF steel and the preparation method thereof, the 260MPa-grade hot-galvanized high-strength IF steel has higher strength, good forming performance and excellent secondary machining brittleness resistance, and the cost is reduced.

The invention relates to the technical field of the auto sheet production process, and relates to a process for producing high-strength IF steel with a high r value. A P-Mn compound added 340 MPa high-strength IF steel is utilized, and the process comprises hot rolling, low-temperature finish rolling, direct online rapid annealing by using the rolled high temperature, rapid cooling till the temperature reaches the coiling temperature, and cold rolling and annealing to obtain a steel plate with 355 MPa extension strength and a 2.75 rolling direction r value. The temperature for hot rolling and finish rolling ranges from 550 DEG C to 850 DEG C, the finish rolling reduction rate is between 70% and 90%, the temperature of the finish rolling phase is below 650 DEG C, the finish rolling phase comprises more than two rolling passes, and the accumulated reduction rate is larger than 40%; the online annealing heating speed is between 30 DEG C / s and 50 DEG C / s, the annealing temperature is in a range of 800 DEG C to 820 DEGC, the heating time is between 10s and 20s, the coiling temperature is between 650 DEGC and 700 DEG C, the cold rolling reduction amount is in a range of 75% to 85%, the heating speed of the continuous annealing process is between 5 DEG C / s and 10 DEG C / s, the heat preservation temperature ranges from 810 DEG C to 830 DEG C, and the heat preservation time is between 100s and 180s.

A heat-resistant cold rolled ferritic stainless steel sheet containing, in mass %, 0.02% or less of C, 0.1% to 1.0% of Si, greater than 0.6% to 1.5% of Mn, 0.01% to 0.05% of P, 0.0001% to 0.0100% of S, 13.0% to 20.0% of Cr, 0.1% to 3.0% of Mo, 0.005% to 0.20% of Ti, 0.3% to 1.0% of Nb, 0.0002% to 0.0050% of B, 0.005% to 0.50% of Al, 0.02% or less of N, with the balance being Fe and inevitable impurities, in which {111}-oriented grains are present at an area ratio of 20% or greater in a region from a surface layer to t / 4 (t is a sheet thickness), {111}-oriented grains are present at an area ratio of 40% or greater in a region from t / 4 to t / 2, and {011}-oriented grains are present at an area ratio of 15% or less in the entire region in a thickness direction.

An attic-insulation cover designed to cover access doors leading into attic spaces, such as scuttle holes and vertical attic doors includes an attic insulation flange or border for placement over the attic opening frame, the attic insulation flange having a first top end and a second bottom end, an attic insulation jacket having a top wall, parallel side walls, parallel end walls and a bottom panel; and a closure device at the second bottom end of the attic-insulation flange for connecting the attic insulation flange and the attic insulation jacket.

The invention discloses high chromium ferritic stainless steel and a manufacturing method thereof. The high chromium ferritic stainless steel is characterized in that the high chromium ferritic stainless steel comprises chemical elements according to the following weight percentage: less than or equal to 0.015 percent of C, less than or equal to 0.020 percent of N, less than or equal to 1.0 percent of Si, less than or equal to 1.0 percent of Mn, less than or equal to 0.035 percent of P, less than or equal to 0.010 percent of S, 20 to 25 percent of Cr, 0.30 to 0.50 percent of Cu, less than or equal to 0. 5 percent of Ti and Nb, and the balance being Fe, wherein (Ti / 48+Nb / 93) / (C / 12+N / 14) is more than 1.5. The manufacturing method comprises the: 1) a step of continuous casting or die casting, in which raw materials are primarily rolled into steel billets after the die casting; 2) a step of rolling, in which the final rolling temperature of steel plates is between 800 and 950 DEG C, and the gradual cooling is performed after the rolling; 3) a step of continuous annealing, in which the temperature is between 850 and 950 DEG C; 4) a step of the removal of oxide coating; 5) a step of cold rolling; and 6) a step of continuous annealing after the recrystallization. The ferritic stainless steel has the advantages of stronger corrosion resistance, higher plasticity and good deep drawability.

A high-strength galvanized steel sheet contains C: 0.010% or more and 0.06% or less, Si: more than 0.5% and 1.5% or less, Mn: 1.0% or more and 3.0% or less, P: 0.005% or more and 0.1% or less, S: 0.01% or less, sol.Al: 0.005% or more and 0.5% or less, N: 0.01% or less, Nb: 0.010% or more and 0.090% or less, and Ti: 0.015% or more and 0.15% or less, on a mass percent basis. The Nb and C contents of the steel satisfy the relation of (Nb / 93) / (C / 12)<0.20. C* satisfies 0.005≦C*≦0.025. Ferrite constitutes 70% by area ratio or more of the steel sheet. Martensite constitutes 3% by area ratio or more of the steel sheet. C*=C−(12 / 93)Nb−(12 / 48){Ti−(48 / 14)N}, wherein C, Nb, Ti, and N denote the C, Nb, Ti, and N contents of the steel.