140results about "Furnace types" patented technology

The invention discloses an apparatus and a method for determining high temperature wettability. The apparatus comprises a heater body, a heating portion, an extruding dripping portion, a sample supporting portion and an image acquisition and processing portion. The heater body is comprised of a stainless steel cavity, a furnace lid and a No. 3 fluorine rubber ring bolt connecting together. A shielding layer in the heating portion is arranged in the center of a furnace bottom in the heater body, and a heating member is placed at the center of the shielding layer. The extruding dripping portionis perpendicularly arranged on an upper end of the heater body, and a lower end of a thermocouple in the heating portion, a lower end of the extruding dripping portion and an upper end of a sample bench are placed in the heater body. A substrate is placed at top of the sample bench. Two sets of CCD digital cameras or CMOS high speed cameras in the image acquisition and processing portion and a light source are respectively placed at the front and rear and the left and right of the heater body, and are in a same horizontal line with a symmetric axis of a quartz glass observation window, a wallthrough hole on the shielding layer and a heating member through hole on the heating member. The invention also provides a method for determining high temperature wettability.

The invention discloses a centrifugal high-carbon, high-boron and high-speed steel composite roller shell and belongs to the technical field of casting. An outer layer of the roller shell is made of a high-carbon, high-boron and high-speed steel material; an inner layer of the roller shell is made of graphitic steel; good metallurgical bonding is achieved by centrifugal casting; an appropriate heat treatment process is adopted for property improvement on the high-carbon, high-boron and high-speed steel composite roller shell; a high-carbon, high-boron and high-speed steel combined roller is fabricated by a hot charging method; the high-carbon, high-boron and high-speed steel composite roller shell can be replaced after being abraded; and the cyclic utilization of a roller shaft is achieved. Compared with a high-speed steel roller by centrifugal casting, the material utilization ratio is increased by more than 30%, and the service life is prolonged by more than 20%.

The invention relates to a high-strength steel plate which comprises the following chemical compositions according to percentages by weight: 0.26-0.35% of C, 0.15-0.50% of Si, 0.60-0.90% of Mn, 0.60-1.00% of Cr, 0.55-0.90% of Mo, 0.80-2.00% of Ni, 0.01-0.10% of Nb, 0-0.10% of V, 0.0006-0.0025% of B, 0.01-0.08% of Al, 0.003-0.06% fo Ti, the rest of Fe and inevitable impurities. A manufacturing method of the high-strength steel plate comprises the following steps of: smelting, casting, heating and rolling the steel plate, and then carrying out austenitization quenching thermal treatment on the steel plate in the temperature of 850-950 DEG C, and adopting water quenching treatment after austenitization; and finally carrying out tempering thermal treatment in the temperature of 180-300 DEG C and air cooling after tempering. The organization of the obtained steel plate is tempered martensite; the yield strength of the steel plate is greater than or equal to 1300Mpa; the tensile strength of the steel plate is greater than or equal to 1400Mpa; and the charpy impact energy, i.e. Akv (-20 DEG C) of the steel plate is greater than or equal to 30J.

A steel product for induction hardening which has a chemical composition in mass % that C: 0.3 to 0.7 %, Si: 1.1 % or less, Mn: 0.2 to 1.1 %, Mo: 0.05 to 0.6, S: 0.06 % or less, P: 0.025 % or less, Al: 0.25 % or less, Cr: 0.3 % or less and the balance: Fe and inevitable impurities, has a ferrite structure and a pearlite structure, wherein the sum of the ferrite structure and the pearlite structure accounts for 90 volume % or more of the steel product, the ferrite structure has a thickness of 30 mum or less, and a hardened layer after induction hardening has an average old austenite grain diameter of 12 mum or less. The above steel product is improved in the easiness to be machined and exhibits excellent fatigue strength, and thus is suitable for a drive shaft and a constant-velocity universal joint.

Provided are: a steel wire rod material for a high-strength spring, which does not undergo the increase in deformation resistance arising from the increase in hardness and can exhibit good wire-drawing processability and the like even when a heat treatment, which deteriorates productivity, is eliminated or a simplified and rapid heat treatment is employed instead; a useful method for producing the steel wire rod material for a high-strength spring; a high-strength spring produced using the steel wire rod material for a high-strength spring as a material; and others. This steel wire rod material for a high-strength spring is a steel wire rod material that has been hot-rolled already, and has a texture having a specified chemical composition and mainly composed of pearlite, wherein the average value (Pave) of the pearlite nodule size numbers and the standard deviation (Pσ) of the pearlite nodule size numbers fulfill the following formulae (1) and (2), respectively:

9.5≦Pave≦12.0;  (1)

and

0.2≦Pσ≦0.7  (2).

There is provided a high-tensile steel sheet containing 0.15 to 0.25 mass % of C, 0.1 to 2.0 mass % of Si, 0.10 to 1.0 mass % of Mn, 0.5 to 3.5 mass % of Cr, 0.02 mass % or less of P, 0.01 mass % or less of S and the balance being Fe and unavoidable impurities based on the total mass of the steel sheet and satisfying a content ratio of Mn/(Mn+Cr)<0.50.

The invention, belonging to mechanical device used for heating the high temperature fatigue sample, relates the three-stage split type fatigue high temperature furnace. The ring insulating brick is installed on the inner wall to form heating cavity. The up and down furnaces have the holes used for sample head restraint crossing. The furnace filament is divided into upper segment, middle segment, and lower segment which are buried in insulating brick and connected by contact point of contact point and controlled by temperature controller and collected temperature by heat electric couple. Due to adopt three stages to control temperature, the invention possesses the advantages of nicety, convenience, high heating rate, homogeneous heating, improving the service life of furnace filament and reducing experimentation cost.

Methods of and systems for automated color control are provided. These methods and systems are suitable for use in various oxidation processes for the coloration of heat treated steel, for example razor blade steel. A feedback loop (closed loop control) is established, including the steps of measuring color, comparing the measured color to a target color and quantifying the difference there-between, and, if the difference exceeds a predetermined threshold, adjusting a color adjustment parameter, e.g., the airflow to the oxidation zone, so that the measured and target colors are equivalent or within a predetermined variance.

The invention discloses an all-fiber-texture large-size one-piece flange fan main shaft forging method which comprises the following steps of material selection, heating, primary firing forging, secondary firing forging, heat treatment after forging, rough turning, ultrasonic flaw detection, hardening and tempering, semifinishing, lossless flaw detection, body sampling, mechanical property testing and stable heat treatment. Compared with the conventional twice-forging and welded flange main shaft production method, the all-fiber-texture large-size one-piece flange fan main shaft forging method has the advantages that the welding working procedures are reduced, the time is saved, the raw material consumption is reduced, and the production cost is lowered; a forged flange main shaft is of an all-fiber-texture structure, so that the natural defects that the welded flange is low in balance property and easy to deform and the root is easy to break are totally overcome; a requirement of a large-size fan on the main shaft design is met.

There is disclosed herein an apparatus and a method in which a workpiece is loaded into the apparatus and the apparatus then moves and positions the workpiece in a multitude of directions based upon the directions and controls supplied to the apparatus through either a computer and applets, a programmable controller and/or through manual intervention. The apparatus can move the workpiece linearly to a predetermined position, rotate the workpiece in a continuous motion, index the workpiece incrementally and/or do any combination of those movements. The apparatus can also control other components such as turning coolant and/or quench valves on and off as desired or powering working tools such as an induction hardening coil. The workpiece is loaded directly on the center of the apparatus movement and positioning device for increased capacity loading and precision movement.

The invention discloses a high-surface-quality hot-galvanized transformation induced plasticity (TRIP) steel plate and a manufacturing method thereof. The hot-galvanized TRIP steel plate is prepared from chemical components in percentage by weight as follows: 0.10%-0.15% of C, 1.20%-1.80% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, 1.20%-2.40% of Als and the balance of Fe and inevitable impurities. The manufacturing method of the TRIP steel plate comprises the steps as follows: continuous casting steelmaking-hot rolling-cold rolling-continuous annealing and hot galvanizing. The structure form of the hot-galvanized TRIP steel plate prepared with the method includes ferrite, bainite, retained austenite and martensite, the grain size grade ranges from Grade 10.5 to Grade 11, the tensile strength ranges from 640 MPa to 670 MPa, the yield strength ranges from 395 MPa to 465 MPa, the ductility is higher than or equal to 30%, the strength and ductility product can be 23GPa% or above, and the plate has the high surface quality, mechanical performance and corrosion resistance.

The invention discloses a special-steel-material flexible wheel of a harmonic reducer, and a cyclic heat treatment method thereof. The cyclic heat treatment method comprises the three steps of carrying out normalizing heat treatment, rough machining and thermal refining; the isothermal annealing operation is cancelled; the normalizing heat treatment comprises the following concrete steps of feeding a forged flexible wheel workblank into a heating furnace, adjusting the normalizing induction heating temperature to range from 880 DEG C+/-20 DEG C, heating and insulating for 45min, and continuously carrying out normalizing heat treatment for two times; and the thermal refining comprises the following concrete steps of feeding a roughly machined flexible wheel workblank into the heating furnace, adjusting the quenching induction heating temperature to range from 850 DEG C+/-20 DEG C, insulating for 45min, then oil quenching, adjusting the tempering induction heating temperature to range from 560 DEG C+/-20 DEG C, insulating for 90min, and carrying out thermal refining for 1 to 3 times according to the flexible wheel grain size number requirement. The special-steel-material flexible wheel of the harmonic reducer, and the cyclic heat treatment method thereof provided by the invention have the beneficial effects that after the cyclic heat treatment method provided by the invention isadopted to treat the flexible wheel made of the special steel material (medium-carbon high-strength quenched and tempered steel), the original austenite grains of the flexible wheel can be refined andhomogenized.

The invention relates to a mobile roller-type van-type heating furnace and a hot-forming subsection strengthening technique. The mobile roller-type van-type heating furnace comprises a shell, heat preservation cotton is arranged on the inner side of the shell, and a furnace door is arranged on one side of the shell. The mobile roller-type van-type heating furnace is characterized in that the shell is divided into multiple areas through one or more isolation doors, and the upper portion of each isolation door is connected with a piston rod of a telescopic cylinder. The hot-forming subsection strengthening technique is characterized by comprising the steps that 1, a boron steel workpiece is led in a furnace chamber inside the shell through rotary rollers at room temperature; 2, the contraction cylinder descends to make the lower end of the isolation door be 5-50 mm away from the workpiece; meanwhile, the isolation door divides the furnace chamber into a hard area and a soft area, the hard area is heated to be 880-930 DEG C, and the soft area is heated to be 500-800 DEG C; 3, when the workpiece is heated to be a specified heating temperature, the workpiece is led out from the heating furnace through the rotary rollers, and hot-forming punching and cooling are conducted on the workpiece. By means of the mobile roller-type van-type heating furnace and the hot-forming subsection strengthening technique, subsection strengthening production of workpieces can be achieved.

A stainless steel strip article is disclosed. The article is formed from a corrosion resistant alloy having the following composition in weight percent, about:

The balance is iron and usual impurities. The elongated thin strip article provides a room temperature tensile strength of at least about 280 ksi in the solution treated and age hardened condition. A method of making the strip article and a method of using it to make a golf club are also disclosed.

A method of manufacturing a hollow stabilizer includes a forming step of subjecting an element pipe to a bending process, to form a product shape including bent portions, and a quenching step of quenching the element pipe subjected to the bending process. In the quenching step, a cooling process is performed by immersing the element pipe made of steel in coolant and by spraying the coolant to an outer surface of the bent portion.

The basic purpose of the present invention, being a method of manufacturing a hot press member with excellent corrosion resistance, is to provide such a method of manufacturing a hot press member with excellent liquid metal brittleness resistance in which liquid metal brittleness cracking due to zinc in a plating layer entering the steel sheet does not occur. This method of manufacturing hot press member is characterized in that a plated steel sheet is provided with a substrate steel sheet and a plating layer, the latter of which is formed on said substrate steel sheet, contains 10-25 mass% of Ni, the remainder being of Zn and unavoidable impurities, and has an adhesion amount per side of 10-90g/m2, and in that said plated steel sheet is heated to 850-950DEG C, and hot press forming is initiated when the temperature of the plated steel sheet after heating is 650-800DEG C.

The vacuum duct anti-plugging device of vacuum cleaning furnace contains a vacuum shell body, the vacuum shell body is connected with one end of vacuum tube, in the vacuum shell body inner cavity a heater and a filter plate are mounted, on the filter plate several small holes are set, on the vacuum shell body an air-intake valve is also mounted. Said invention also provides a vacuum-pumping device of vacuum cleaning furnace. Said device contains all the technical characteristics of the above-mentioned vacuum duct anti-plugging device, and said device contains the following components: water-spraying cleaning device, water ring-type vacuum pump and gas-water separate. Said invention also provides the connection mode of them, and also provides its working principle.

The invention discloses a pair of rolling-cut type bilateral scissors and a manufacturing method thereof. The pair of rolling-cut type bilateral scissors comprises ingredients in percentage by weight as follows: 0.40%-0.65% of C, 0.15%-0.35% of Si, 0.60%-0.80% of Mn, 3.50%-6.00% of Ni, 2.5%-4.00% of Cr, 1.50%-2.50% of Mo, 2.00%-3.50% of V, smaller than or equal to 0.02% of S, smaller than or equal to 0.025% of P, larger than or equal to 4% of Cr and Mo and the balance of Fe and unavoidable impurities. The manufacturing method of the rolling-cut type bilateral scissors comprises steps as follows: smelting, ingot casting, forging, annealing, rough machining, pretreatment process (normalizing and high-temperature tempering), semifinishing, final heat treatment (quenching and tempering) and finish machining. The rolling-cut type bilateral scissors can meet the production demand of high-strength medium plates of HG980, HG108, X80 and the like, and the shearing quality and shearing tonnage of the bilateral scissors are improved.

The invention relates to a production method of L80-1 steel-grade oil casings with low cost. The production method is characterized in that chemical components of blanks include, by weight, 0.22-0.32% of C, 0.20-0.35% of Si, 1.30-1.50% of Mn, P smaller than or equal to 0.020%, S smaller than or equal to 0.015%, 0.15-0.30% of Cr and 0.01-0.04% of Al; the production process of the oil casings includes molten iron pretreatment, combined blown converter steelmaking process, LF(ladle furnace) refining, VD (vacuum degasser) vacuum treatment, round continuous casting, blank heating, piercing, continuous rolling, sizing/strength reducing, cooling, sawing, straightening, thermal treatment and flaw detection; the thermal treatment includes preserving heat and water quenching at the temperature of 870 DEG C +/-20 DEG C for 40 minutes, and cooling in air after tempering at the temperature of 690 DEG C+/-20 DEG C and preserving heat for 70 minutes. The production method has the advantages that since the 34MnCr22 steel grade is utilized, material components are reasonable in design, precious metal elements such as Molybdenum are not contained in materials of the casings, and cost is low; in the thermal treatment, water quenching and tempering are utilized, no affection to environment is caused by water quenching, cost is lowered, plasticity of steel is improved greatly on the premise of guaranteeing strength, and impact ductility of steel casings is improved, and thus, the oil casings can meet requirements of API Spec 5CT standards.

The invention belongs to the technical field of tunnel kilns, and particularly relates to a double-cylinder kiln car pusher which can be used for a tunnel kiln. A kiln car can continuously run by the aid of the double-cylinder kiln car pusher. The double-cylinder kiln car pusher comprises a kiln car pusher body device, two hydraulic cylinders and two car pushing traveling devices, wherein the kiln car pusher body device comprises a cylinder front transverse fixing plate, a cylinder rear transverse fixing plate, two cylinder traveling tracks and a cylinder traveling double-track combination, the two hydraulic cylinders comprise a left cylinder, a right cylinder and two piston rods, and the two car pushing traveling devices comprise cylinder pushing running fixing frames, shaft sleeves, pulleys, props, a fourth positioning switch, a third positioning switch, a first positioning switch and a second positioning switch. The double-cylinder kiln car pusher has the advantages that the kiln car can continuously run, burnt products are assuredly uniformly heated in a high-temperature zone, and the quality of the products is stable.