CN101168792A - Applying method of temperature section timing oil quenching in wear-resisting material heat treatment - Google Patents
Applying method of temperature section timing oil quenching in wear-resisting material heat treatment Download PDFInfo
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Abstract
The invention relates to an application method used in the anti-friction material heat treatment in the temptation section timing oil quenching. The invention is characterized in that the method comprises a quenching flow and a tempering flow, the oil temperature is 75 plus or minus 5 DEG C during the quenching, and the quenching time is determined according to the diameter of a grinding ball and a grinding section. The method enhances the hardness degree and the ductility of the common high chromium product and the uniformity of the hardness degree, and reduces the abrasion wear of the grinding body, thereby reducing the distortion possibility of a casting ball and the section during the using process.
Description
Technical field
The present invention relates to the heat treating method in a kind of casting industry, particularly relate to the application method of a kind of temperature section timing oil quenching in high-abrasive material thermal treatment.
Background technology
China is cement resource big country, and cement industry is occupied an leading position, and the quality of abrasive body mass directly affects the safety in production and the production cost in cement mill.Do work in grinding machine as the abrading-ball (spheroid) of grinding element, mill section (right cylinder) and to be mainly impact and the effect of milling, abrading-ball, mill section are in use for some time, constantly with between material, liner plate and abrading-ball, the mill section self produce and wear and tear, thermal treatment process in the past can not be guaranteed the difference of hardness≤1.5HRC between abrading-ball, mill section surface and the heart portion, after abrading-ball, the higher part of mill section surface hardness are worn and torn, it shows as abrasion and increases sharply, even the circle phenomenon occurs losing.For stopping or delay the generation of this type of phenomenon, guarantee the standard of the difference of hardness≤1.5HRC on abrading-ball, mill section heart portion and surface, to grinding element, particularly the improvement of the thermal treatment process of the high chromium ball in the abrading-ball has just become extremely urgent task.
For the thermal treatment Heating temperature, cool times etc. are to product hardness and flexible influence, the raising Cr13Mo2 HI-chrome cast iron for grinding balls Study on Wear Resistance that database had once been reported Lian Yishu is plucked in China's mechanical engineering, the Cr13Mo2 HI-chrome cast iron for grinding balls adopts former thermal treatment process, its hardness is HRC45-50, adopt 920-940 ℃ of insulation 1.5 hours, No. 20 machine oil oil coolings of national standard, and in 350 ℃ of insulations tempering in 4 hours, abrading-ball hardness can reach more than the HRC62, life-span, (the section steel ball was meant the right cylinder of casting the certain-length specification with the pig iron, cuts into segment then as required than the section steel ball.) improve 4 times.This is because oil quenching can obtain full martensitic matrix, has resistance to abrasion and flexible best fit (" Anshan iron and steel plant technology " the 4th phase in 1992: the 33-37 page or leaf) after the tempering.The main purpose of this problem is to improve the wear resisting property of HI-chrome cast iron for grinding balls, and its technology constituent ratio is more reasonable, easily operation.But it can not make abrading-ball surface and heart portion be heated to reach evenly, still have possibility of distortion in abrading-ball, the use of mill section, quench thoroughly inadequately during quenching, can not avoid having influenced the abrading-ball outward appearance because of the rapid persistently overheating surperficial over oxidation of abrading-ball that causes.The abrading-ball cool time is longer, inefficiency.This technology only is applicable to the Cr13Mo2 HI-chrome cast iron for grinding balls.
This shows that above-mentioned existing grinding element thermal treatment process obviously still has defective, and demands urgently further being improved.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but does not see always that for a long time suitable design finished by development, and this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of new high-abrasive material heat treating method, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Summary of the invention
Main purpose of the present invention is, overcome the defective that existing grinding element thermal treatment process exists, and provide a kind of new application method of temperature section timing oil quenching in high-abrasive material thermal treatment, technical problem to be solved is the homogeneity that makes its hardness that improves common high chromium product and toughness and hardness, reduces the grinding element abrasion.
The object of the invention to solve the technical problems realizes by the following technical solutions.The application method of temperature section timing oil quenching in high-abrasive material thermal treatment according to the present invention proposes comprises quenching flow process and tempering flow process, and the oily temperature during quenching is 75 ± 5 ℃, and the cool time is according to the diameter decision of abrading-ball, mill section.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The application method of aforesaid temperature section timing oil quenching in high-abrasive material thermal treatment, the wherein said cool time is determined with reference to following table according to the diameter of abrading-ball, mill section.
| The grinding element type | Diameter (mm) | Cool time (minute) |
| Abrading-ball | 100 | 6 |
| 90 | 6 | |
| 80 | 5 | |
| 70 | 4.5 | |
| 60 | 4 | |
| 50 | 4 | |
| 40 | 3 | |
| 30-25 | 2 | |
| 20 | 1 | |
| 15-17.5 | 1 | |
| The mill section | 12-18 | 1 |
| 20-30 | 2 | |
| 35-50 | 3 | |
| ≥60 | 4 |
The application method of aforesaid temperature section timing oil quenching in high-abrasive material thermal treatment, wherein said high-abrasive material were heated to 960 ± 10 ℃ before going into oil quenching.
The application method of aforesaid temperature section timing oil quenching in high-abrasive material thermal treatment, in the tempering flow process of wherein said high-abrasive material after quenching, tempering temperature is controlled at 400 ± 5 ℃.
The application method of aforesaid temperature section timing oil quenching in high-abrasive material thermal treatment, wherein said high-abrasive material are incubated 6 hours under described tempering temperature.
The application method of aforesaid temperature section timing oil quenching in high-abrasive material thermal treatment, wherein said quenching flow process also comprises the steps: to be heated to 650 ℃ at heat treatment furnace, constant temperature kept 2-2.5 hour, be heated to 750 ℃, secondary constant temperature kept 2-2.5 hour, was heated to 900 ℃, three times constant temperature kept 2-2.5 hour, be heated to 960 ℃, four times constant temperature kept 2-2.5 hour, came out of the stove into oil quenching after 960 ℃ of constant temperature keep finishing; After described tempering flow process comprises the steps: to quench and finishes, pick up in the oil plant, drop oil, when treating that product temperature is reduced to 125 ℃ ± 10 ℃, enter tempering stove, be heated to 400 ℃ ± 5 ℃, constant temperature kept 6 hours, constant temperature is come out of the stove after keeping finishing, put into burial pit to naturally cool to≤100 ℃, put into the working area and stack, continue cooling.
The application method of aforesaid temperature section timing oil quenching in high-abrasive material thermal treatment, wherein the quench cooled oil plant adopts national standard 46# machinery oil and M500# base oil by 5: 3 proportionings.
The present invention compared with prior art has tangible advantage and beneficial effect.By technique scheme, the application method of temperature section timing oil quenching of the present invention in high-abrasive material thermal treatment has following advantage at least:
Technical scheme of the present invention is compared with the Cr13Mo2 high chromium casting ball Study on Wear Resistance of Lian Yishu has following progress:
1, four sections warm area heating are taked in thermal treatment, and every section warm area heating back is incubated 2 hours, is warmed up to 960 ℃ ± 10 ℃ at last and quenches.This temperature section timing method can make surperficial being heated with heart portion of abrading-ball reach evenly, quenches thoroughly during quenching, and avoiding again simultaneously influences the abrading-ball outward appearance because of the rapid persistently overheating surperficial over oxidation of abrading-ball that causes.
2, abrading-ball cool time weak point, and definite according to the specification size, save the energy, time, improved working efficiency.
3, this technology can be widely used in common high-Cr grinding balls, mill section.
Technical scheme of the present invention is after use, and the hardness of the grinding element of being produced is stable more and significantly rise: the above ball of diameter 70mm, section rise to 60 ° by original 56 °; The following ball of diameter 70mm, section rise to 61 °～62 ° by original 58 °, and be 1.2 times of general common high chromium ball its friction durability, and the abrasion of single storehouse descend about 16.7%.Have good toughness, wear resistance is good and hardness is high, percentage of damage is low characteristics.Moreover, it more makes the hardness of product and toughness reach optimum matching.
The hardness of domestic grinding element of the same trade, percentage of damage, single storehouse wear away respectively about 56,1%, 30 gram/ton cement, and adopt hardness, percentage of damage, single storehouse of the product of producing after the method for the present invention to wear away respectively at 60,0.3%, 25 gram/ton cement, impact value 〉=20000 time, index all is better than domestic colleague's grinding element.Thus, the present invention can lower consumption for industry energy conservation, create beneficial result.
Among the present invention, it is heat-eliminating medium that the quenching mode adopts machinery oil, make all under equal conditions coolings of each point of product in quickening of product speed of cooling and the quenching process, improved the homogeneity of product hardness, reduce the client and in use cast the possibility of ball, section appearance distortion, and reduced the noise that produces because of the high pressure blower running when wind is quenched.
The quality of abrasive body mass directly affects the safety in production and the production cost in cement mill, and the product and the economic benefit contrast of other products after use in the part cement mill of producing according to method of the present invention see also table 1.
Table 1: product of the present invention and other products use back economic benefit synopsis in the part cement mill
| Abrading-ball | Abrading-ball of the present invention | The Guangdong abrading-ball | India's abrading-ball |
| Cr content | 11-12％ | 11-12％ | 11-12％ |
| Abrasion | 25 gram/ton cement | 30 gram/ton cement | 45 gram/ton cement |
| Unit price | 7100 yuan/ton | 7100 yuan/ton | 10800 yuan/ton |
| The ton cement cost | 0.1775 unit/ton cement | 0.213 unit/ton cement | 0.486 unit/ton cement |
As can be seen from the above table, the product that adopts the application method of temperature section timing oil quenching of the present invention in high-abrasive material thermal treatment to produce is being starkly lower than other two tame producer aspect the ton cement consuming cost.
According to incompletely statistics, whole nation high-abrasive material year total demand is about 3,000,000, if all use method of the present invention, can be country every year and save nearly 500,000 tons of steel, save nearly 2,500,000,000 yuan of Renminbi, save resources such as great amount of manpower, nature, the energy simultaneously for country, thereby had remarkable social benefit.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technique means of the present invention, and can be implemented according to the content of specification sheets, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the quenching graphic representation in the application method of temperature section timing oil quenching of the present invention in high-abrasive material thermal treatment.
Fig. 2 is the tempering curve figure in the application method of temperature section timing oil quenching of the present invention in high-abrasive material thermal treatment.
Embodiment
Reach technique means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of the application method of temperature section timing oil quenching in high-abrasive material thermal treatment, step, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
The contriver studied material hardness and flexible influence common high chromium ball oil quenching temperature, time.It is as shown in table 2 that oil quenching temperature and cool time influence (abrading-ball that with the diameter is 80mm is an example) to product hardness, flexible:
Table 2: oil quenching temperature and cool time are to product hardness, flexible influence
| Sequence number | The austenitizing Heating temperature | Cool time (minute) | The oil temperature | The HRC scope | Tempering temperature ℃ | The falling sphere number of times |
| 1 | 650 ℃ 2.5 hours 750 ℃ 2.5 hours 900 ℃ 2.5 hours 960 ℃ 2.5 hours | 5 | 60℃ | 65-68 | 250 | 15000 |
| 2 | 650 ℃ 2.5 hours 750 ℃ 2.5 hours 900 ℃ 2.5 hours 960 ℃ 2.5 hours | 5.5 | 65℃ | 64.5-67 | 300 | 14820 |
| 3 | 650 ℃ 2.5 hours 750 ℃ 2.5 hours 900 ℃ 2.5 hours 960 ℃ 2.5 hours | 6 | 68℃ | 65.0-67 | 350 | 13000 |
| 4 | 650 ℃ 2.5 hours 750 ℃ 2.5 hours 900 ℃ 2.5 hours 960 ℃ 2.5 hours | 5 | 75℃ | 60-62 | 400 | 20321 |
| 5 | 650 ℃ 2.5 hours 750 ℃ 2.5 hours 900 ℃ 2.5 hours 960 ℃ 2.5 hours | 5 | 60℃ | 64-67 | 400 | 16200 |
| 6 | 650 ℃ 2.5 hours 750 ℃ 2.5 hours 900 ℃ 2.5 hours 960 ℃ 2.5 hours | 5 | 78℃ | 62.5-64 | 400 | 20785 |
Wherein, " austenitizing Heating temperature " is that half product is gone into the preceding Heating temperature in process furnace of oil quenching.
As can be seen from the table, under the low thermal treatment situation of short and oily temperature of cool time, though casting ball hardness increases, because its quenching process is fast, tempering temperature is low, causes its toughness not reach requirement, and the falling sphere number of times can not satisfy specified requirement.
When the casting ball in Heating temperature at 960 ± 10 ℃, quenched 5 minutes down 75 ± 5 ℃ oil temperature, tempering temperature is at 400 ± 5 ℃, the hardness and the toughness of casting ball when being incubated 6 hours have reached optimum matching.
In view of the above, the contriver has proposed the application method of temperature section timing oil quenching of the present invention in high-abrasive material thermal treatment, and it comprises quenching flow process and tempering flow process.
As shown in Figure 1, described quenching flow process is as follows: work in-process dress baskets (wire netting basket), enter heat treatment furnace, be heated to 650 ℃, constant temperature kept 2-2.5 hour, be heated to 750 ℃, secondary constant temperature kept 2-2.5 hour, be heated to 900 ℃, three times constant temperature kept 2-2.5 hour, be heated to 960 ℃, four times constant temperature kept 2-2.5 hour, and work in-process are come out of the stove into oil quenching after 960 ℃ of constant temperature keep finishing, being about to whole basket work in-process, to put into ready initial temperature be 75 ℃ ± 5 ℃ oil plant, therebetween because ball, the oil temperature that the high temperature transmission of section causes rises and ignores, and the cool time is according to abrading-ball, the diameter decision of mill section is specifically carried out (the wherein diameter for the mill section of filling " section ") referring to table 3.
Table 3: each diameter abrading-ball, mill section cool time synopsis
| Diameter (mm) | The oil temperature (℃) | Go into oil (quenching) time (minute) | Tempering temperature (℃) |
| 100 | 75±5 | 6 | 400±5 |
| 90 | 75 | 6 | 400±5 |
| 80 | 75±5 | 5 | 400±5 |
| 70 | 75±5 | 4.5 | 400±5 |
| 60 | 75±5 | 4 | 400±5 |
| 50 | 75±5 | 4 | 400±5 |
| 40 | 75±5 | 3 | 400±5 |
| 30-25 | 75±5 | 2 | 400±5 |
| 20 | 75±5 | 1 | 400±5 |
| 15-17.5 | 75±5 | 1 | 400±5 |
| The 12-18 section | 75±5 | 1 | 400±5 |
| The 20-30 section | 75±5 | 2 | 400±5 |
| The 35-50 section | 75±5 | 3 | 400±5 |
| 〉=60 sections | 75±5 | 4 | 400±5 |
Wherein quench cooled oil adopts national standard 46# machinery oil and M500# base oil by 5: 3 proportionings.
As shown in Figure 2, described tempering flow process is: after work in-process are finished quenching, pick up in the oil plant, drop oil, when treating that product temperature is reduced to 125 ℃ ± 10 ℃, enter tempering stove, be heated to 400 ℃ ± 5 ℃, constant temperature kept 6 hours, and work in-process were come out of the stove after constant temperature kept finishing, put into burial pit to naturally cool to≤100 ℃, put into the working area and stack, continue cooling, carry out quality test after the cooling fully.
Through the product after the improvement postheat treatment explained hereafter of the present invention, hardness can reach 〉=60HRC.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (7)
1. the application method of a temperature section timing oil quenching in high-abrasive material thermal treatment is characterized in that it comprises quenching flow process and tempering flow process, and the oily temperature during quenching is 75 ± 5 ℃, and the cool time is according to the diameter decision of abrading-ball, mill section.
2. the application method of temperature section timing oil quenching according to claim 1 in high-abrasive material thermal treatment is characterized in that the wherein said cool time is definite with reference to following table according to the diameter of abrading-ball, mill section.
3. the application method of temperature section timing oil quenching according to claim 2 in high-abrasive material thermal treatment is characterized in that wherein said high-abrasive material was heated to 960 ± 10 ℃ before going into oil quenching.
4. the application method of temperature section timing oil quenching according to claim 2 in high-abrasive material thermal treatment is characterized in that tempering temperature is controlled at 400 ± 5 ℃ in the tempering flow process of wherein said high-abrasive material after quenching.
5. the application method of temperature section timing oil quenching according to claim 4 in high-abrasive material thermal treatment is characterized in that wherein said high-abrasive material is incubated 6 hours under described tempering temperature.
6. the application method of temperature section timing oil quenching according to claim 2 in high-abrasive material thermal treatment, it is characterized in that wherein said quenching flow process also comprises the steps: to be heated to 650 ℃ at heat treatment furnace, constant temperature kept 2-2.5 hour, be heated to 750 ℃, secondary constant temperature kept 2-2.5 hour, was heated to 900 ℃, three times constant temperature kept 2-2.5 hour, be heated to 960 ℃, four times constant temperature kept 2-2.5 hour, came out of the stove into oil quenching after 960 ℃ of constant temperature keep finishing;
After described tempering flow process comprises the steps: to quench and finishes, pick up in the oil plant, drop oil, when treating that product temperature is reduced to 125 ℃ ± 10 ℃, enter tempering stove, be heated to 400 ℃ ± 5 ℃, constant temperature kept 6 hours, constant temperature is come out of the stove after keeping finishing, put into burial pit to naturally cool to≤100 ℃, put into the working area and stack, continue cooling.
7. according to the application method of the above described temperature section timing oil quenching of any claim in high-abrasive material thermal treatment, it is characterized in that wherein the quench cooled oil plant adopts national standard 46# machinery oil and M500# base oil by 5: 3 proportionings.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101886212A (en) * | 2010-06-30 | 2010-11-17 | 安徽省宁国诚信耐磨材料有限公司 | Sand casting grinding ball and heat treatment process thereof |
| CN102399533A (en) * | 2011-09-26 | 2012-04-04 | 宁国市东方碾磨材料有限责任公司 | Wear-resistant and corrosion-resistant nano-abrasive material and preparation method thereof |
| CN102418046A (en) * | 2011-08-22 | 2012-04-18 | 宁国市东方碾磨材料有限责任公司 | Novel multi-component alloy groove lining plate |
| CN102703653A (en) * | 2012-04-27 | 2012-10-03 | 宁国慧宏耐磨材料有限公司 | Quenching process of wear-resistant steel balls and steel forgings |
| CN102703796A (en) * | 2012-06-20 | 2012-10-03 | 石家庄市诚达耐磨材料有限公司 | High abrasion resistance high-chromium alloy cast iron grinding ball dedicated for mine and processing technology thereof |
| CN103667663A (en) * | 2013-11-14 | 2014-03-26 | 安徽省宁国市宁沪钢球有限公司 | Quenching process of high chromium cast ball section |
| CN105671260A (en) * | 2016-01-29 | 2016-06-15 | 安徽省凤形耐磨材料股份有限公司 | Non-oil type quenching medium heat treatment method |
| CN105695684A (en) * | 2016-03-29 | 2016-06-22 | 宁国市开源电力耐磨材料有限公司 | Heat treatment technology for high-carbon steel multi-alloy grinding balls and high-carbon steel multi-alloy grinding balls |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101886212A (en) * | 2010-06-30 | 2010-11-17 | 安徽省宁国诚信耐磨材料有限公司 | Sand casting grinding ball and heat treatment process thereof |
| CN102418046A (en) * | 2011-08-22 | 2012-04-18 | 宁国市东方碾磨材料有限责任公司 | Novel multi-component alloy groove lining plate |
| CN102399533A (en) * | 2011-09-26 | 2012-04-04 | 宁国市东方碾磨材料有限责任公司 | Wear-resistant and corrosion-resistant nano-abrasive material and preparation method thereof |
| CN102703653A (en) * | 2012-04-27 | 2012-10-03 | 宁国慧宏耐磨材料有限公司 | Quenching process of wear-resistant steel balls and steel forgings |
| CN102703796A (en) * | 2012-06-20 | 2012-10-03 | 石家庄市诚达耐磨材料有限公司 | High abrasion resistance high-chromium alloy cast iron grinding ball dedicated for mine and processing technology thereof |
| CN102703796B (en) * | 2012-06-20 | 2013-08-21 | 石家庄市诚达耐磨材料有限公司 | High abrasion resistance high-chromium alloy cast iron grinding ball dedicated for mine and processing technology thereof |
| CN103667663A (en) * | 2013-11-14 | 2014-03-26 | 安徽省宁国市宁沪钢球有限公司 | Quenching process of high chromium cast ball section |
| CN103667663B (en) * | 2013-11-14 | 2016-02-10 | 安徽省宁国市宁沪钢球有限公司 | A kind of quenching technology of high chromium casting ball section |
| CN105671260A (en) * | 2016-01-29 | 2016-06-15 | 安徽省凤形耐磨材料股份有限公司 | Non-oil type quenching medium heat treatment method |
| CN105695684A (en) * | 2016-03-29 | 2016-06-22 | 宁国市开源电力耐磨材料有限公司 | Heat treatment technology for high-carbon steel multi-alloy grinding balls and high-carbon steel multi-alloy grinding balls |
| CN105695684B (en) * | 2016-03-29 | 2017-09-12 | 宁国市开源电力耐磨材料有限公司 | The Technology for Heating Processing and high-carbon steel multi-alloy abrading-ball of high-carbon steel multi-alloy abrading-ball |
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