阅读说明：本技术 一种火力发电设备专用钢球制造工艺 (A kind of steam power plant special-purpose steel ball manufacturing process ) 是由 邱腾飞 于 2019-07-29 设计创作，主要内容包括：本发明涉及钢球生产技术领域,且公开了一种火力发电设备专用钢球制造工艺,包括选用原材料、冷镦成型、热处理、强化处理、抛光、表面探伤、研磨、清洗和包装的上述步骤组成,原材料选用GCr15轴承钢,GCr15轴承钢含氧量低于0.01％,钛含量小于0.03％,且GCr15轴承钢的颗粒杂物小于1.5级,再通过将GCr15轴承钢原材料进行轻拉处理,使原材料的直径轻拉缩小0.4-0.5mm,然后进行冷镦成型,在冷镦成型过程中将GCr15轴承钢原材料的压缩比控制在1.5-1.9之间,使成型处的球坯呈无环带状态,同时没有明显的两极柱。该火力发电设备专用钢球制造工艺,能够进一步提高钢球表面质量与几何精度,且能够保证钢球的硬度和恶劣环境下使用的寿命,提高了产品质量和使用寿命,便于人们使用。(The present invention relates to steel ball production technical fields, and disclose a kind of steam power plant special-purpose steel ball manufacturing process, including selecting raw material, cold-heading molding, heat treatment, intensive treatment, polishing, surface inspection, grinding, the above-mentioned steps of cleaning and packaging composition, raw material selection GCr15 bearing steel, GCr15 bearing steel oxygen content is lower than 0.01%, Ti content is less than 0.03%, and the particle sundries of GCr15 bearing steel is less than 1.5 grades, again by the way that GCr15 bearing steel raw material is carried out light drawing processing, make the small 0.4-0.5mm of the light pulling-down of the diameter of raw material, then cold-heading molding is carried out, the compression ratio of GCr15 bearing steel raw material is controlled between 1.5-1.9 during cold-heading molding, make the ball base at molding in acyclic carrier state, simultaneously without apparent Two poles.The steam power plant special-purpose steel ball manufacturing process can further increase steel ball surface quality and geometric accuracy, and can guarantee the service life used under the hardness and adverse circumstances of steel ball, improve product quality and service life, use convenient for people.)

1. a kind of steam power plant special-purpose steel ball manufacturing process, including select raw material, cold-heading molding, heat treatment, at reinforcing Reason, polishing, surface inspection, grinding, cleaning and packaging above-mentioned steps composition, it is characterised in that:

Step 1: raw material selection GCr15 bearing steel, the GCr15 bearing steel oxygen content are lower than 0.01%, and Ti content is less than 0.03%, and the particle sundries of GCr15 bearing steel is less than 1.5 grades, then by carrying out GCr15 bearing steel raw material at light drawing Reason, makes the diameter of the raw material small 0.4-0.5mm of light pulling-down, then carries out cold-heading molding, by GCr15 axis during cold-heading molding The compression ratio for holding steel raw material controls between 1.5-1.9, makes the ball base at molding in acyclic carrier state, while without apparent Two poles；

Step 2: tempering heat treatment being carried out to the ball base after cold-heading molding, the tempering temperature is 200-250 DEG C, time 3-4 Hour, intensive treatment is carried out to it after the completion of tempering, it, will by being uniformly embedded into nanometer zirconium oxide ceramic powder on the surface of steel billet The steel billet that insertion is completed is put into lift resistance kiln, is heated to 1500-2000 DEG C, sintering is in porcelain, and it is small to keep the temperature 4-5 When, so that its density is greater than 8g/cm³, make its Temperature fall cooling；

Step 3: by the steel ball of step 2 by grinding twice, and being polished by polishing machine, to the table of steel billet after the completion of polishing Face carries out eddy current inspection, and the steel ball lossless to appearance passes through resin sand wheel disc again and refined twice；

Step 4: the steel ball after the completion of grinding being cleaned, and is packed by packing machine.

2. a kind of steam power plant special-purpose steel ball manufacturing process according to claim 1, it is characterised in that: the reinforcing Increase steel ball in processing step to hit with autonomous drop and mutually hit, so that steel ball surface forms the strengthening layer of certain depth, The depth of the strengthening layer is greater than 0.2mm.

3. a kind of steam power plant special-purpose steel ball manufacturing process according to claim 1, it is characterised in that: described vertical Abrasive disc uses soft-ball groove-grinding, and the trench depth scattered error of vertical abrasive disc is less than 0.004mm.

4. a kind of steam power plant special-purpose steel ball manufacturing process according to claim 1, it is characterised in that: the step 2 pairs of steel billets carry out heating by the way of intermediate frequency or line-frequency induction heating.

5. a kind of steam power plant special-purpose steel ball manufacturing process according to claim 1, it is characterised in that: by the heat Steel billet after the completion of processing is quenched in the pond that temperature is 50 DEG C -70 DEG C in a manner of continuous rolling, and is contained in pond There is water-soluble quenching agent, the surface of steel billet is made to form one layer of steam blanket.

6. a kind of steam power plant special-purpose steel ball manufacturing process according to claim 5, it is characterised in that: described water-soluble Property quenching medium is the NACO3 solution that concentration is 5-10%.

7. a kind of steam power plant special-purpose steel ball manufacturing process according to claim 1, it is characterised in that: the step Nanometer zirconium oxide ceramic powder dosage in 2 is the 0.1-0.3% of steel ball quality.

Technical field

The present invention relates to steel ball production technical field, specially a kind of steam power plant special-purpose steel ball manufacturing process.

Background technique

Thermal power generation is the thermal energy generated using combustible in burning, is converted into the one of electric energy by generation power device Kind generation mode.The rich coal resources of China, 10.9 hundred million tons of nineteen ninety producing coal, wherein coal for power generation only accounts for 12%.Firepower hair Electricity is the main generation mode in China, three big host equipments one of of the station boiler as firepower power station, along with China's thermoelectricity The development of industry.

Currently, steel ball makes the necessary article at thermal power generation most equipment rotation, and steel ball is adopted mostly in the prior art With the mode hot rolling steel ball of single direction rotation, cause steel ball friction subsurface power that steel ball surface layer localized metallic plasticity is caused to exhaust so that sending out Raw Plastic Damage, steel ball in the presence of a harsh environment in use, be subject to more serious corrosion, are set for a long time so as to cause machinery Standby use goes wrong, and is not easy to the use of people.

Summary of the invention

(1) the technical issues of solving

In view of the deficiencies of the prior art, the present invention provides a kind of steam power plant special-purpose steel ball manufacturing process to have energy Steel ball surface quality and geometric accuracy are enough further increased, and can guarantee the longevity used under the hardness and adverse circumstances of steel ball The advantages of life, improves product quality and service life, uses convenient for people, solves steel ball in the prior art and mostly uses list greatly To the mode hot rolling steel ball of rotation, cause steel ball friction subsurface power that steel ball surface layer localized metallic plasticity is caused to exhaust so that moulding Property damage, steel ball for a long time in the presence of a harsh environment in use, more serious corrosion is subject to, so as to cause mechanical equipment Using going wrong, the problem of being not easy to the use of people.

(2) technical solution

In order to achieve the above object, the invention provides the following technical scheme: a kind of steam power plant special-purpose steel ball manufactures Technique, including selecting raw material, cold-heading molding, heat treatment, intensive treatment, polishing, surface inspection, grinding, cleaning and packaging Above-mentioned steps composition,

Step 1: raw material selection GCr15 bearing steel, the GCr15 bearing steel oxygen content are lower than 0.01%, and Ti content is small In 0.03%, and the particle sundries of GCr15 bearing steel is less than 1.5 grades, then by gently being drawn GCr15 bearing steel raw material Processing, makes the diameter of the raw material small 0.4-0.5mm of light pulling-down, cold-heading molding is then carried out, by GCr15 during cold-heading molding The compression ratio of bearing steel raw material controls between 1.5-1.9, and making the ball base at molding is in acyclic carrier state, while not bright Two aobvious poles；

Step 2: tempering heat treatment being carried out to the ball base after cold-heading molding, the tempering temperature is 200-250 DEG C, the time It is 3-4 hours, intensive treatment is carried out to it after the completion of tempering, by the way that nanometer zirconium oxide ceramic powder is uniformly embedded into the table in steel billet The steel billet that insertion is completed is put into lift resistance kiln by face, is heated to 1500-2000 DEG C, sintering is in porcelain, and keeps the temperature 4- 5 hours, its density is made to be greater than 8g/cm³, make its Temperature fall cooling；

Step 3: by the steel ball of step 2 by grinding twice, and being polished by polishing machine, to steel billet after the completion of polishing Surface carry out eddy current inspection, the steel ball lossless to appearance pass through resin sand wheel disc again and refined twice；

Step 4: the steel ball after the completion of grinding being cleaned, and is packed by packing machine.

Preferably, increase steel ball in the intensive treatment step to hit with autonomous drop and mutually hit, so that steel ball table Face forms the strengthening layer of certain depth, and the depth of the strengthening layer is greater than 0.2mm.

Preferably, the vertical abrasive disc uses soft-ball groove-grinding, and the trench depth scattered error of vertical abrasive disc is less than 0.004mm。

Preferably, the step 2 carries out heating by the way of intermediate frequency or line-frequency induction heating to steel billet.

Preferably, the water for being 50 DEG C -70 DEG C in temperature in a manner of continuous rolling by the steel billet after the completion of the heat treatment It is quenched in pond, and contains water-soluble quenching agent in pond, the surface of steel billet is made to form one layer of steam blanket.

Preferably, the water-soluble quenching agent is the NACO3 solution that concentration is 5-10%.

Preferably, the nanometer zirconium oxide ceramic powder dosage in the step 2 is the 0.1-0.3% of steel ball quality.

(3) beneficial effect

Compared with prior art, the present invention provides a kind of steam power plant special-purpose steel ball manufacturing process, have following The utility model has the advantages that

1, the steam power plant special-purpose steel ball manufacturing process is strong by preferred raw material, ball base forming process, surface Chemical industry skill, resin wheel lapping technique further increase steel ball surface quality and geometric accuracy, and can guarantee the hardness of steel ball With the service life used under adverse circumstances, product quality is improved, and then improves the service life of steel ball.

Specific embodiment

Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described, Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the scope of protection of the invention.

A kind of steam power plant special-purpose steel ball manufacturing process, including select raw material, cold-heading molding, heat treatment, reinforcing Processing, polishing, surface inspection, grinding, cleaning and packaging above-mentioned steps composition,

Step 1: raw material selection GCr15 bearing steel, GCr15 bearing steel are that a kind of alloy content is less, have formedness Energy, most widely used high-carbon-chromium bearing steel have high and uniform hardness, good wearability, high contact fatigue property, GCr15 bearing steel oxygen content is lower than 0.01%, and Ti content is less than 0.03%, and the particle sundries of GCr15 bearing steel is less than 1.5 Grade, then by the way that GCr15 bearing steel raw material is carried out light drawing processing, make the diameter of the raw material small 0.4-0.5mm of light pulling-down, then Cold-heading molding is carried out, the compression ratio of GCr15 bearing steel raw material is controlled between 1.5-1.9 during cold-heading molding, is made Ball base at molding is in acyclic carrier state, while without apparent two pole, can the deformation quantity of steel ball steel ball when in use, protect The using effect for demonstrate,proving steel ball, to improve the service life of steel ball；

Step 2: tempering heat treatment being carried out to the ball base after cold-heading molding, tempering temperature is 200-250 DEG C, time 3-4 Hour, intensive treatment is carried out to it after the completion of tempering, it, will by being uniformly embedded into nanometer zirconium oxide ceramic powder on the surface of steel billet The steel billet that insertion is completed is put into lift resistance kiln, is heated to 1500-2000 DEG C, sintering is in porcelain, and it is small to keep the temperature 4-5 When, so that its density is greater than 8g/cm³, make its Temperature fall cooling, the steel ball surface for injecting nano oxidized zircon porcelain powder is in compression State, the more unimplanted steel ball of stress value improves 10% or more, while corrosion resistance can be improved in nano oxidized zircon porcelain, so as to Guarantee the service life of steel ball in the presence of a harsh environment, convenient for the use of people, the ingredient of nanometer zirconium oxide ceramic is to be by granularity The yttrium partially stabilized nano zirconium oxide powder of oxidation of 40-100nm partial size, which is matched with polyvinyl alcohol by the mass ratio of 95:2, to be mixed, and is added The water purification for entering 1.5 times of mixture weight is deployed into slurry ball-milling 20h, by the way that nanometer zirconium oxide ceramic powder is added, can make steel ball Hardness improve 5%；

Step 3: by the steel ball of step 2 by grinding twice, and being polished by polishing machine, to steel billet after the completion of polishing Surface carry out eddy current inspection, the steel ball lossless to appearance passes through resin sand wheel disc again and is refined twice, by grinding for the first time The oxide skin that mill generates when can be to heat treatment is removed, and is conducive to strengthen the using effect in middle strengthening layer, then pass through Second of grinding, can be improved the set precision of steel ball, while needing that strengthening layer is prevented to be destroyed, being capable of steel by eddy current inspection The damage of ball surface, flaw detection is by instrument to be vortexed or photoelectricity or the such progress in a manner of three kinds of vibration, by former materials such as crackles Material defect, burr, the defect generated in process such as chews and all sorts out pressure wound, while being capable of overground steel Ball is detected, and hidden danger of quality that may be present is eliminated, and sub-elects qualified products, then by refining twice, can be improved steel ball The smoothness on surface, to reduce the frictional force in use process；

Step 4: the steel ball after the completion of grinding being cleaned, and is packed by packing machine, by cleaning machine to energy It is enough that the attached crop of steel ball surface is cleared up, while packing pack is carried out, it can be convenient for the transport to steel ball entirety.

Increase steel ball in intensive treatment step to hit with autonomous drop and mutually hit, so that steel ball surface forms a depthkeeping The depth of the strengthening layer of degree, strengthening layer is greater than 0.2mm, and steel can be made by the local transition in a manner of gradient of surface layer effective depth To normal tissue, so as to improve the hardness of steel ball surface, can anticollision, it is wear-resistant, thus improve steel ball use the longevity Life.

Vertical abrasive disc uses soft-ball groove-grinding, and the trench depth scattered error of vertical abrasive disc is less than 0.004mm, can be improved Precision when to steel ball fine grinding, guarantees the effect of steel ball fine grinding, convenient for the use of people.

Step 2 carries out heating by the way of intermediate frequency or line-frequency induction heating to steel billet, can be improved effect when heating Rate and safety,.

Steel billet after the completion of heat treatment is quenched in the pond that temperature is 50 DEG C -70 DEG C in a manner of continuous rolling Fire, and contain water-soluble quenching agent in pond makes the surface of steel billet form one layer of steam blanket, enable to steel mechanical property Expected requirement can be reached.

Water-soluble quenching agent is the NACO3 solution that concentration is 5-10%, can preferably make water-soluble quenching agent steel ball it Between react to each other.

Nanometer zirconium oxide ceramic powder dosage in step 2 is the 0.1-0.3% of steel ball quality, can between steel ball shape At effective proportion, to maximize the effect for playing nanometer zirconium oxide ceramic powder.

To sum up, the steam power plant special-purpose steel ball manufacturing process passes through preferred raw material, ball base forming process, table The technique of surface strengthening technique and grinding and fine grinding, can further increase steel ball surface quality and geometric accuracy, and can guarantee In the service life used under the hardness and adverse circumstances of steel ball, product quality and service life are improved, convenient for the use of people.

It should be noted that term " includes " or any other variant thereof is intended to cover non-exclusive inclusion, thus So that the process, method, article or equipment for including a series of elements not only includes those elements, but also including not clear The other element listed, or further include for elements inherent to such a process, method, article, or device.Do not having more In the case where more limitations, the element that is limited by sentence "including a ...", it is not excluded that including process, the side of the element There is also other identical elements in method, article or equipment.

It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.