52results about How to "Improve quenching hardness" patented technology

The invention discloses a heat shaping fixture and a heat shaping method in the quenching process of a metal material seal ring, and relates to a heat shaping fixture and a heat shaping method in the quenching process of a seal ring. The invention solves the problems that the integral hardness of a seal ring cannot be improved, the opening size cannot be ensured and waste products are easily produced in the conventional quenching technology. The device comprises that: an upper cover plate and a bottom plate are vertically aligned; a wedge block is nailed in an inclined hole of each shaft; the shaft is sleeved with number adjustable gaskets; the metal material seal ring is arranged between the upper cover plate and the bottom plate; an oil immersion hole on the upper cover plate corresponds to the upper end face of the metal material seal ring; and an oil immersion hole of a lower cover plate corresponds to the lower end face of the metal material seal ring. The method comprises the following steps of: clamping the seal ring in the heat shaping fixture; putting the seal ring and the heat shaping fixture into a heat treatment furnace, and completing quenching and tempering procedures of the heat treatment, which meet the hardness requirement; and detaching the heat shaping fixture and taking the seal ring out. The invention is used for heat shaping in the quenching process of the metal material seal ring.

The invention provides an austempered ductile iron adjusting chemical component. The chemical component uses Mn and Si as a base to substitute Mo and Ni, and contains a plurality of elements comprising Cu, B, Nb and Cr to realize low and micro alloying, so the respective effects of all elements are fully performed, the interactive effect promotion is realized, the hardenability is increased, the alloy consumption is reduced, and the cost is reduced. The invention also provides a new austempered ductile iron quenching technology matched with the austempered ductile iron. The technology is a step austempering technology using step quenching oil and an air isothermal furnace. The heat treatment of a workpiece through the technology realizes crystal grain refinement, good hardenability, high strength and toughness, low hardness (HB190-240) before the step austempering treatment, and good processing performances; and the obtained processed austempered ductile iron has a high hardness (HRC35-56) and extremely less oxidation and deformation, so the precision is guaranteed, and finishing treatments comprising grinding and the like are not needed. Compared with traditional nitrate bath austempering technologies, the austempered ductile iron quenching technology has the advantages of low cost, no generation of large amounts of harmful substances comprising nitrite or the like, low pollution and safety.

The invention discloses a thin ring part heat treatment fixture which comprises a partition plate, a core rod, an upper mould plate and a lower mould plate, wherein the upper mould plate and the lower mould plate are oppositely arranged; a plurality of thin ring parts are stacked to form a plurality of thin ring part groups, and every two adjacent thin ring part groups are spaced by the partition plate; the partition plate is provided with a plurality of liquid holes, and the liquid holes are communicated with the annular end surfaces of the two adjacent thin ring part groups; the upper mould plate and the lower mould plate are both provided with first installation holes, and fasteners penetrate through the first installation holes of the upper mould plate and the lower mould plate and the liquid holes to clamp the partition plate and the plurality of thin ring parts between the upper mould plate and the lower mould plate. The invention also discloses a processing method of a thin spring steel tooth blade. The thin ring part heat treatment fixture disclosed by the invention can be used for improving the planeness of the thin ring parts subjected to quenching and tempering.

An alloyed gray pig iron used for the die of the covering part of car contains C (2.8-3.2 wt.%), Si (1.8-2.2), Mn (0.6-0.9), P (0-0.08), S (0-0.03), Cr (0.1-0.5), Cu (0.2-1.0), Mo (0.1-0.5), Ni (0.3-0.5) and Fe (rest). Its preparing process includes such steps as proportionally mixing raw materials, smelting, casting, audio induction quenching, heating to 850-950 deg.C, and quenching in air. Its advantages are high hardness and high mechanical performance.

The present invention provides a machine tool guide rail broad band laser quenching process, which includes: A. Gasoline or alcohol is used to remove oil stain or rust on the surface of a steel rail, then sand paper is used to polish the surface of the guide rail to remove the oil stain further, so that a light absorbing coat can be applied evenly; B. A spraying gun or a brush can be used to apply the SiO2 light absorbing dope well proportioned with adhering agent mixture on the surface of the guide rail evenly, to improve the absorbing rate of the SiO2 laser by the metal surface; the prescription of the dope and the adhering agent is 80-100gSiO2 plus 500-600ml alcohol plus 15ml paint flake, and the pre-coating thickness is 0.02-0.05mm; C. An air-dry coat; D. A 3-6KW crosscurrent CO2 laser is used to scan the guide rail arranged on a laser numerical control machine at a speed of 250-800mm/min, to heat and cool the SO2 coat on the surface of the guide rail rapidly. The present invention has the advantages that the quenching rigidity is high, the workpiece distortion is small, the quenching medium is not needed, and the work efficiency is high, oxygenation and pollution cannot be produced.

An air-hardened alloyed nodular cast iron for the die of car contains C (3.5-3.8 wt.%), Si (2.1-2.5), Mn (0.5-0.8), Cr (0.1-0.3), Cu (0.8-1.0), Mo (0.4-0.6), Ni (0.2-0.4), P (0-0.02), S (0-0.02) and Fe (rest). Its preparing process includes such steps as proportionally mixing raw materials, smelting, casting, quenching in audio induction mode, heating to 850-950 deg.C, and quenching in air. Its advantages are high hardness and high mechanical performance.

The invention discloses quenching oil capable of enabling an automobile plate spring to blacken automatically after quenched and a quenching method thereof. The invention belongs to the field of metal heat treatment technology. The quenching oil comprises the following components, by weight, 35-40 parts of refined base oil, 7-10 parts of cooling catalyzed composite agent, 0.4-0.7 parts of blackening composite agent, 0.3-0.5 parts of brightening agent, 0.4-0.7 parts of surface activating agent and 0.02-0.03 parts of antioxidant. The effect is best when the maximum cooling speed of the quenching oil for the plate spring is about 110-120 DEG C/s and the using temperature is 65-70 DEG C. Under the above conditions, the strength and the stiffness of the quenched plate spring are greatly improved, at the same time the effect of the automatic surface blackening can be realized and a protective film formed on the surface is strong in adhesion and good in wear-resisting property. Once more surface coating and rust preventing treatment after the heat treatment can be reduced, so that the resources can be saved, the processes can be reduced and the efficiency can be improved.

The invention discloses a heat treatment technology of a martensite stainless steel workpiece. The technology comprises the steps of annealing, quenching, a primary tempering technology and a secondary tempering technology. By adopting the above mode, the heat treatment technology allows a forged piece to satisfy a heat treatment hardness requirement, guarantees the heat treatment performance, realizes a high quenching hardness, and also realizes alloy uniformization, crystal grain refinement and forging stress elimination.

The invention discloses a quenching phosphorated fluid for metal comprehensive processing, which is prepared by the following raw materials in percentage by weight: 5 percent of sodium silicate, 5 percent of zinc nitrate, 5 percent of H3PO4, 1 percent of acid manganous phosphate, 1 percent of calcium sulphate, 1 percent of ammonium molybdate, 1 percent of calcium nitrite, 1 percent of magnesium chloride, 1 percent of surface active agent and the balance of water. The quenching phosphorated fluid is used for carrying out deoiling, derusting and phosphorating processing on the surface of metal simultaneously, has non-poisonous processing fluid and no metal pollution and is comprehensive processing fluid with favorable economic benefits.

An upsetting method capable of eliminating a correction step by preventing occurrence of quench distortion is provided. The method includes the step of preparing an upsetting apparatus 10 equipped with a forming die 11 and a guide 20 having an insertion hole 21 for securing a diameter expansion scheduled portion 2 of the bar-shaped raw material 1 in a buckling preventing state and a punch 30. The diameter expansion scheduled portion 2 of the raw material 1 in a heated state is disposed in the insertion hole 21 of the guide 20 in a heated state, and the tip end portion of the guide 20 is disposed in the cavity 12 of the forming die 11 adjusted in temperature so as to be below a temperature of the raw material 1, and the raw material is secured to the securing portion 13 of the forming die 11. With this state, the guide 20 is moved in a direction opposite to a moving direction 37 of the punch 30 while axially pressurizing the diameter expansion scheduled portion 2 of the raw material 1 by moving the punch 30, to thereby expand the diameter expansion scheduled portion 2 of the raw material 1 exposed between a tip end portion of the guide 20 and the securing portion 13 of the forming die 11 within the cavity 12 of the forming die 11.

The invention discloses an induction quenching machining method of a Cr12 roller, and belongs to a roller quenching process. The induction quenching machining method comprises the following steps: (1)putting a roller to be quenched into a resistance furnace and preheating the roller to be quenched to 500 DEG C to 600 DEG C and performing heat insulation for a period of time; (2) enabling the roller to penetrate through a first induction coil at a certain motion speed and a rotation speed, preheating the roller to 780 DEG C to 900 DEG C and performing heat insulation for a period of time; (3)enabling the roller to penetrate through a second induction coil at the certain motion speed and the rotation speed, heating the roller to 960 DEG C and 1080 DEG C and performing heat insulation for aperiod of time; (4) performing air-cooling and pre-cooling on the roller and then performing water-cooling quenching; and (5) putting the roller into an air-circulation tempering furnace and performing tempering at a tempering temperature of 150 DEG C to 500 DEG C. According to the induction quenching machining method disclosed by the invention, uniformity and fineness of metallurgical structuresof the roller can be ensured, the hardness is qualified, and the labor strength is reduced.

The invention discloses chain piece specific quenching oil and a quenching method thereof. The invention belongs to the field of metal heat treatment technology. The quenching oil comprises the following components, by weight, 35-40 parts of refined base oil, 7-10 parts of cooling catalyzed composite agent, 0.5-0.7 parts of blackening composite agent, 0.4-0.8 parts of brightening agent, 0.5-0.8 parts of surface activating agent and 0.02-0.04 parts of antioxidant. The effect of is best when the maximum cooling speed of the quenching oil for the chain piece is about 93-102 DEG C/s and the using temperature is 70-80 DEG C. Under the above conditions, the ideal quenching hardness can be obtained, the deformation rate is low, the effect of the automatic surface blackening can be realized, a protective film formed on the surface is strong in adhesion and not easy to fall off, and the effect of the appearance beautification and short-term rust prevention can be realized. Once more surface coating and rust preventing treatment after the heat treatment can be reduced, so that the resources can be saved, the processes can be reduced and the efficiency can be improved.

The invention discloses GGG70L nodular cast iron and a preparation method thereof, and belongs to the technical field of cast iron production. The GGG70L nodular cast iron comprises the following chemical components of, by weight, 3.4-3.8% of C, 2.0-2.4% of Si, 0.5-0.6% of Mn, 0.06% of P or the less, 0.01% of S or the less, 0.45-0.55% of Mo, 0.9-1.0% of Cu, 0.9-1.0% of Ni, 0.04-0.06% of Mg, 0.015-0.025% of Sn, 0.1-0.15% of Cr and the balance Fe. The GGG70L nodular cast iron is added according to the existing alloy ratio, when a casting is more than 8 tons, the content of pearlite in the core can also reach 85% or more, and it is guaranteed that the hardness of the quenched casting is larger than 55 HRC.

The invention relates to a heat treatment technology for die-casting die steel. The steps of heat treatment are as follows: 1. quenching: loading raw material into a furnace at 550 DEG C, preserving heat for 40 min; heating to 1,150 DEG C, preserving heat for 110-130 min, and then discharging the raw material and cooling the raw material with oil to room temperature; 2. tempering: tempering the raw material three times, with the heating temperature of 560-700 DEG C and the heat preservation time of 90 min in each tempering. according to the heat treatment technology, as the quenching temperature rises, the quenching hardness is improved, more carbide is dissolved, the austenite alloying extent is increased, and thus martensite is strengthened; tempering that is performed once in the traditional technology is performed three times, so that residual low-hardness austenite in the material is fully changed into high-hardness secondary martensite to improve the mechanical property of a die. The service life of the die treated according to the heat treatment technology can reach 4,500 times, the cost of the die is lowered and the production efficiency is increased.

The invention provides a nodular cast iron grinding ball and a preparation method thereof. The grinding ball comprises the following chemical components in percentage by mass: 3.6%-3.7% of C, 2.5%-2.8% of Si, 1.6%-1.8% of Mn, 0.07%-0.1% of Sn, 0.03%-0.05% of Mg, 0.02%-0.03% of Re, less than or equal to 0.06% of S, less than or equal to 0.1% of P and the balance of Fe. According to the spheroidal graphite cast iron grinding ball and the preparation method thereof provided by the invention, the grinding ball overcomes the defects of high hardness and low toughness of a spheroidal graphite cast iron grinding ball in the prior art, and has certain hardness and high wear resistance while having high toughness.

The invention discloses a heat treatment induction quenching process for a small hole. The process comprises the following steps of inspection, cleaning and drying, quenching, cleaning and drying, tempering, detection and rust prevention. The process is simple, the whole course is environmentally friendly and free of pollution, the hardness, strength and wear resistance of the small hole can be effectively improved, and the service life of the small hole is prolonged. In the quenching step, an HX-200 medium is adopted for cooling, so that quenching for the small hole is uniform, a uniform skin film is formed on the metal surface, a workpiece is effectively protected against cracking, the brought-out quantity is extremely small, the quenched workpiece is free of cleaning, the medium is free of discharge, the medium is applicable to various materials, the concentration does not need to be adjusted, the production cost is reduced, energy is saved, environmental pollution is reduced, and economic benefits are improved.

The invention discloses a free-cutting high-carbon steel anneal non-oxidation technique. Workpieces are put into an annealing oven for annealing with the control of temperature and heating time, in the annealing process, carbon having a mass ratio of 1:200 with the workpieces is added into the annealing oven, the workpieces are heated under a temperature of 750 DEG C for five hours, and then are heated under a temperature of 694 DEG C for another five hours.According to the invention, decarburization in the anneal course of high-carbon steel can be prevented and quenching hardness can be improved, because carbon having a mass ratio of 1:200 with the workpieces is added into the annealing oven in the annealing process of high-carbon steels, subsequent acid washing process can be omitted, surface quality of the high-carbon steel can be improved and processing cost of the high-carbon steel can be reduced.