42results about How to "Good heat treatment performance" patented technology

A P110 steel level high frequency straight welded pipe manufacturing method comprises (1) taking hot-rolled coil as raw material; (2) shaping the coil into a straight seam pipe by continuous shaping techniques, welding the straight seam on the pipe by a high frequency inductive welding machine to produce a primary pipe, and after the welding, timely removing external and internal burrs of the primary pipe; (3) heating the primary pipe removed of burrs by a medium frequency induction furnace to 920-950 degrees centigrade and conveying it to a hot rolling and diameter reducing machine, rolling the primary pipe into pipe blanks with different apertures by hot mechanical rolling; (4) conducting whole-pipe quenching and tempering to the hot roller pipe blank to produce finished pipe; (5) conducting ultrasonic flaw detection and pipe end magnetic powder inspection to the finished pipe. The invention takes low steel level coil as raw material to produce primary pipe, produces pipe blanks with different diameter specifications by the primary pipe with the same specification, and produces oil casing product with high steel level and high performance by low steel level economical pipe blanks. The working efficiency is high. The production cost is low.

The invention discloses Cu-reinforced Co-free secondary-hardening ultrahigh-strength steel and a preparation method, belonging to the technical field of alloy steel. The steel comprises the following chemical components in percentage by weight: 0.20-0.50% of C, 1.0-5.0% of Cr, 8.0-30.0% of Ni, 1.0-5.0% of Mo, 1.0-5.0% of Cu, 0-3.0% of Al, 0-2.0% of W, less than or equal to 0.30% of V, less than or equal to 0.20% of Nb and the balance of Fe and unavoidable impurities. According to the preparation method, the vacuum induction and vacuum consumable remelting technology or the vacuum induction and electroslag remelting technology can be adopted. Compared with the prior art, the Cu-reinforced Co-free secondary-hardening ultrahigh-strength steel has the advantages of good comprehensive performance, higher strength, good plasticity and toughness, good heat treatment process performance and higher tempering resistance and overaging resistance; the content of strategic resource Co element is saved and the economical efficiency is remarkably improved.

The invention discloses Co-free composite reinforced secondary hardening ultrahigh-strength steel and a preparing method and belongs to the technical field of alloy steel. The Co-free composite reinforced secondary hardening ultrahigh-strength steel comprises, by weight, 0.20-0.50% of C, 1.0-5.0% of Cr, 10.0-30.0% of Ni, 0.50-3.0% of Al, 1.0-5.0% of Mo, 2.0% of W or less, 0.30% of V or less, 0.20% of Nb or less, and the balance Fe and unavoidable impurities. The vacuum induction technology, the vacuum arc remelting or vacuum induction technology and the electroslag remelting technology can be adopted in the alloy. Compared with the prior art, the Co-free composite reinforced secondary hardening ultrahigh-strength steel has the beneficial effects that the comprehensive performance is good, ultrahigh strength and good ductility and toughness are achieved, the heat treatment technology is superior in performance, high temper resistance and overaging resisting capability are achieved, the content of the strategic resource of the Co element is saved, and the economical efficiency is improved.

The invention provides an inner conical elastomer for a strain force transducer. The inner conical elastomer comprises a cylindrical base body; the upper part of the base body is provided with a conical concave part; the bottom of the conical concave part is provided with a central hole; and the conical surface of the conical concave part is provided with a strain gauge. The optimization method for the elastomer comprises the following steps of: estimating an initial size; calculating stress of the elastomer under the action of the axial force of a bolt by a finite element method, and adjusting the cone angle of a model until stress on the inner conical surface is distributed uniformly; adjusting the thickness of the base body under the condition of not changing the cone angle to ensure that the stress level on the conical surface meets the requirement; and rounding the model size obtained through finite element calculation, wherein the rounded model size is used as the final size of the elastomer. The inner conical elastomer is a simple revolution solid, and is high in processing and heat treatment manufacturability; the stress of the adhesion part of the strain gauge is distributed uniformly; and the accuracy of the adhesion position of the strain gauge is not required. The axial size of the elastomer is smaller than that of a spoke elastomer, and the elastomer is more suitable for measuring the axial force of the bolt.

The invention provides a degradable antibacterial magnesium alloy and a preparation method of the degradable antibacterial magnesium alloy, and relates to the field of metal biomedical materials. Thedegradable antibacterial magnesium alloy comprises main active elements of Ag, Cu, Zn and Sr, and by means of composition optimization design of the magnesium alloy, the components comprise, by mass,1.35-1.65% of Ag, 0.9-1.1% of Cu, 3.6-4.4% of Zn, 0.9-1.1% of Sr, 0.36-0.44% of Ca and the balance Mg and other inevitable impurities. After the magnesium alloy material implant finishes the action, the magnesium alloy material implant can be completely degraded to avoid secondary operation removal, the medical cost and the pain of patients are reduced, the antibacterial property of the implant isimproved, and the magnesium alloy material implant has the functions of promoting osteoblast formation and inhibiting osteoclast bone absorption; the degradable antibacterial magnesium alloy adopts asemi-solid rheological die casting process, the microstructure of the product is uniformly distributed, the internal structure is compact, the defects of pores, segregation and the like are few, andthe requirements for high quality and high precision of implant products can be met.

The invention belongs to the field of alloy materials and relates to a high cost performance titanium alloy and a preparation method thereof. Titanium is mainly contained, besides, the titanium alloy further contains, by weight, 4%-7% of aluminum, 0.2%-2.5% of iron, 0.1%-2% of chromium and little inevitable impurities, and the titanium alloy does not contain molybdenum and vanadium. Compared with a TC4 titanium alloy material widely used in the prior art, the high cost performance titanium alloy is easier to machine, heat treatment performance is good, machining forming is easier, performance is better, and the production cost and the final price of the alloy material can be reduced.

The invention discloses a quenching agent for a die steel. The quenching agent is characterized by being prepared from the following raw materials in parts by weight: 2-4 parts of sodium molybdate, 3-5 parts of sodium chloride, 0.3-0.5 part of sodium silicate, 0.1-0.2 part of disodium hydrogen phosphate, 0.5-1 part of octyl phenol polyethylene ether, 0.3-0.5 part of sodium methylene dinaphthalene sulfonate, 1-2 parts of hydroxypropyl guar gum, 0.5-1 part of sodium carboxymethyl starch, 0.5-1 part of oxalic acid, 0.1-0.2 part of polymaleic anhydride, 3-5 parts of auxiliaries and 70-80 parts of water. The quenching agent disclosed by the invention is good in thermal treatment process performance, high in quenching degree, and small in thermal treatment deformation, the work-piece is high in hardness and abrasion resistance and suitable for the quenching treatment of the die steel.

The invention provides a critical solid solution and critical cooling and heating variable-temperature aging and annealing heat treatment method. The critical solid solution and critical cooling and heating variable-temperature aging and annealing heat treatment method comprises a critical solid solution heat treatment process and a critical cooling and heating variable-temperature aging and annealing heat treatment process. According to the scheme, the method has technical feasibility, process adaptability, quality reliability, economic rationality and use safety, the advantages can be effectively adopted, disadvantages of a traditional mainstream heat treatment method of austenitic stainless steel are avoided, the special heat treatment problems of poor quality stability, low qualified rate, low hardness, low mechanical property, poor consistency, poor discoloration and corrosion resistance, long heating time, low efficiency, poor heating reliability of heat treatment equipment, short service life of high-temperature parts, high cost and the like of austenitic stainless steel heat treatment are solved, the method is particularly suitable for the technical field of hot working engineering such as smelting, steel rolling, forging and heat treatment of austenitic stainless steel involved in steel mills and manufacturers.

The invention discloses a 40Mn2B alloy structural steel material, which is used for manufacturing alloy structural steel with high hardenability and low hardening break sensitivity. The 40Mn2B alloy structural steel material comprises the following chemical components in percentage by weight: 0.37-0.42 percent of C, 0.17-0.37 percent of Si, 1.40-1.70 percent of Mn, 0.20-0.60 percent of Cr, 0.0010-0.0035 percent of B, 0.015-0.045 percent of Ti, less than or equal to 0.035 percent of P, less than or equal to 0.035 percent of S, less than or equal to 0.06 percent of Mo, less than or equal to 0.15 percent of Ni and less than or equal to 0.25 percent of Cu. The hardness of the 40Mn2B alloy structural steel material can reach J13/50-60 HRC, the tempering hardness of 217-269 HB can be reached in a normalized condition, the effective hardened layer depth of 10-16mm can be achieved for shaft type parts, the cost is lower than that of the 42CrMo material, the hardening break sensitivity is low, and the thermal treatment processibility is good.

The invention provides a critical solid solution and critical repeated cooling aging and annealing heat treatment method which comprises a critical solid solution heat treatment process and a critical repeated cooling aging and annealing heat treatment process. The scheme of the invention has technical feasibility, process adaptability, quality reliability, economic reasonability and use safety, can effectively enhance the advantages and avoid the disadvantages of a conventional mainstream heat treatment method of austenitic stainless steel, fundamentally solves the "one-long one-high four-poor five-low" special heat treatment technical difficult problems of "poor quality stability, low rate of qualified products, low hardness, low mechanical property, poor consistency, poor discoloration and rust corrosion resistance, long heating time, low efficiency, poor heating reliability of heat treatment equipment and low service life and high cost of a high-temperature component" of existing austenitic stainless steel heat treatment, and is particularly suitable for the technical field of heat working engineering such as smelting, steel rolling, forging, heat treatment and the like related to the austenitic stainless steel in steel mills and manufacturers.

The invention provides an aging heat treatment method with sufficient solid solution and sufficient heating and cooling. The method comprises a sufficient solid solution heat treatment process, a sufficient heating aging heat treatment process and a sufficient cooling aging heat treatment process. According to the scheme, the special heat treatment technical problems of poor quality stability, low qualified product rate, low hardness, low mechanical property, poor consistency, long heating time, low efficiency, poor heating reliability of heat treatment equipment, short service life of high-temperature parts, high cost and the like of existing austenitic stainless steel heat treatment can be solved.

The invention provides a critical solid solution and critical multi-cooling variable-temperature aging and annealing heat treatment method. The method comprises a critical solid solution heat treatment process and a critical multi-cooling variable-temperature aging and annealing heat treatment process. The scheme has technical feasibility, process adaptability, quality reliability, economic rationality and use safety, and can effectively enhance the advantages and avoid the disadvantages of a traditional mainstream heat treatment method of austenitic stainless steel, so that the problems that the existing austenitic stainless steel heat treatment is poor in quality stability, low in qualified rate, low in hardness, low in mechanical property, poor in consistency, poor in discoloration and corrosion resistance, long in heating time, low in efficiency, low in cost and the like are fundamentally solved. The critical solid solution and critical multi-cooling variable-temperature aging and annealing heat treatment method is particularly suitable for the technical field of hot working engineering such as smelting, steel rolling, forging and heat treatment related to the austenitic stainless steel in steel mills and manufacturers.

The invention provides an aging heat treatment method for critical solid solution as well as critical temperature rise, temperature fall and temperature variation. The aging heat treatment method comprises a critical solid solution heat treatment process as well as a critical temperature rise, temperature fall and temperature variation aging heat treatment process. The aging heat treatment method provided by the invention has technical feasibility, process adaptability, quality reliability, economic rationality and use safety; the advantages and disadvantages of a traditional mainstream heat treatment method for austenitic stainless steel can be effectively enhanced and avoided; the specific heat treatment technology problems that in the existing austenitic stainless steel heat treatment process, the quality stability is low, the rate of qualified products is low, the hardness is relatively low, the mechanical performance is low, the consistency is poor, the discoloration and corrosion resisting capacity is poor, the heating time is long, the efficiency is low, the heating reliability of heat treatment equipment is poor, the service life of high-temperature components is short, and the cost is high can be fundamentally solved; and the aging heat treatment method is particularly applicable to the technical fields of hot-working engineering such as smelting, steel rolling, forging and heat treatment of austenitic stainless steel in steel mills and manufacturing plants.

The invention provides a sufficient solid solution and sufficient heating and cooling variable-temperature aging heat treatment method. The method comprises a sufficient solid solution heat treatment process, a sufficient heating aging heat treatment process and a sufficient cooling variable-temperature aging heat treatment process. According to the scheme, the problems that existing austenitic stainless steel heat treatment is poor in quality stability, low in qualified product rate, low in hardness, low in mechanical property, poor in consistency, long in heating time, low in efficiency, heat treatment equipment is poor in heating reliability, high-temperature components are short in service life, the cost is high, and other special heat treatment technology problems can be solved.

The invention provides a rapid solid solution and rapid cooling, heating and variable-temperature aging heat treatment method. The heat treatment method comprises a rapid solid solution heat treatment process and a rapid cooling, heating and variable-temperature aging heat treatment process. According to the scheme, the specific heat treatment technical problems of low quality stability, qualified rate, hardness, mechanical property and consistency, long heating time, low efficiency, low heating reliability of heat treatment equipment, short service life and high cost of high-temperature components and the like during austenitic stainless steel heat treatment can be solved.

The invention provides an aging heat treatment method for critical solid solution as well as critical temperature rise and temperature fall. The aging heat treatment method comprises a critical solid solution heat treatment process, a critical temperature rise aging heat treatment process and a critical temperature fall aging heat treatment process. The aging heat treatment method provided by the invention has technical feasibility, process adaptability, quality reliability, economic rationality and use safety; the advantages and disadvantages of a traditional mainstream heat treatment method for austenitic stainless steel can be effectively enhanced and avoided; the specific heat treatment technology problems that in the existing austenitic stainless steel heat treatment process, the quality stability is low, the rate of qualified products is low, the hardness is relatively low, the mechanical performance is low, the consistency is poor, the discoloration and corrosion resisting capacity is poor, the heating time is long, the efficiency is low, the heating reliability of heat treatment equipment is poor, the service life of high-temperature components is short, and the cost is high can be fundamentally solved; and the aging heat treatment method is particularly applicable to the technical fields of hot-working engineering such as smelting, steel rolling, forging and heat treatment of austenitic stainless steel in steel mills and manufacturing plants.

The invention provides a critical solid solution and critical-beginning low-temperature alternating aging composite heat treatment method. The method comprises a critical solid solution heat treatment process and a critical low-temperature alternating aging composite heat treatment process. According to the scheme, the problems that existing austenitic stainless steel heat treatment is poor in quality stability, low in qualified rate, low in hardness, low in mechanical property, poor in consistency, poor in discoloration and corrosion resistance, long in heating time, low in efficiency, low in cost and the like can be solved. The heating reliability of heat treatment equipment is poor; the service life of a high-temperature component is short; the cost is high; and the like.

The invention provides a critical solid solution and critical starting low-temperature multiple variable-temperature alternating aging heat treatment method. The method involves a critical solid solution heat treatment process and a critical starting low-temperature multiple variable-temperature alternating aging heat treatment process. The scheme provided by the method has technical feasibility, process adaptability, quality reliability, economic rationality and use safety, and can effectively improve the advantages and avoid the disadvantages of the traditional mainstream heat treatment method of austenitic stainless steel; the special heat treatment technical problems of "one long, one high, four poor and five low", namely, poor quality stability, low qualified rate, low hardness, low mechanical property, poor consistency, poor discoloration and corrosion resistance, long heating time, low efficiency, poor heating reliability of heat treatment equipment, short service life of high-temperature components and high cost and the like of the existing austenitic stainless steel heat treatment can be fundamentally solved; and method is particularly suitable for the technical field of hot working engineering such as smelting, steel rolling, forging and heat treatment of the austenitic stainless steel involved in steel mills and manufacturers.

The invention provides a critical solid solution and high-temperature-varying alternating aging and annealing composite heat treatment method. The method comprises a critical solid solution heat treatment process and a heat treatment process which is critically started from high-temperature variable-temperature alternating aging and annealing composite heat treatment process. According to the scheme, the problems that existing austenitic stainless steel heat treatment is poor in quality stability, low in qualified rate, low in hardness, low in mechanical property, poor in consistency, poor in discoloration and corrosion resistance, long in heating time, low in efficiency, low in cost and the like can be solved. The heating reliability of heat treatment equipment is poor; the service life of a high-temperature component is short; the cost is high; and the like.