CN1116434C - Nodular eutectic austenite steel base authigenic composite material - Google Patents
Nodular eutectic austenite steel base authigenic composite material Download PDFInfo
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- CN1116434C CN1116434C CN 01105355 CN01105355A CN1116434C CN 1116434 C CN1116434 C CN 1116434C CN 01105355 CN01105355 CN 01105355 CN 01105355 A CN01105355 A CN 01105355A CN 1116434 C CN1116434 C CN 1116434C
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Abstract
The present invention relates to a spheroidal eutectic crystal austenite steel-based authigenic composite material. A modifier prepared from alloys of magnesium-rare earth-ferrosilicon alloy, calcium-silicon-rare earth alloy, ferrotitanium, electrolytic copper, pure aluminium, ferroboron, etc. is adopted; the solidification process of molten steel containing 0.8 to 1.8% of carbon, 6.0 to 12.0% of manganese, 0.5 to 2.0% of silicon, 0.0 to 1.2% of chromium, 0.01 to 0.19% of sulfur and 0.02 to 0.10% of phosphorus is controlled to obtain a reinforced phase of a spheroidal eutectic crystal; a novel composite material with an austenite substrate is directly obtained under a casting state. The novel composite material has excellent obdurability and abrasion resistance, and can be used for manufacturing easily abraded parts which are used under the operating condition of medium or low stress impact grinding abrasion.
Description
The present invention relates to a kind of novel nodular eutectic and strengthen austenite steel base in-situ composite preparation method, the easy mill spare that uses under the low stress impact abrasive wear operating mode in can be applicable to be manufactured on belongs to metallurgy, wear-resistant material and preparing technical field thereof.
At present, the wear-resistant material that uses both at home and abroad mainly contains: Austenitic Manganese Steel, low alloy steel, alloy white cast iron etc.Document " development of steel of the wearing and tearing of lining board of grinder and liner plate " (Zhang Qing, " iron and steel " 88 years the 5th phases) introduced Austenitic Manganese Steel under the low shock stress abrasive wear operating mode Austenitic Manganese Steel can not give full play to its work hardening capacity, resistance to abrasion is low, has shortcomings such as initial hardness is low because of single austenitic matrix again; In under the low shock stress abrasive wear operating mode, quenching-tempered dilute-alloy martensite Development of Wear Resistant Steel has high resistance to abrasion than Austenitic Manganese Steel, but mainly come wear-resistant by the hardness of martensitic matrix, the wild phase that does not have high rigidity in the matrix, thereby the raising of resistance to abrasion is limited, and this steel shortcoming to be quenching technology carry out improper or chemical ingredients is easy to crack when vowing excessive and baroque wear-resistant the quenching of control or cross dimensions; Document " improving the novel process of high-chromium white cast iron spare use properties " (Piao Dongxue etc., " casting " 94 years the 2nd phases) introduced all kinds of alloy white cast irons and contained the wear-resistant carbide of a large amount of height because of it, so have high resistance to abrasion, but its most outstanding shortcoming is easy brittle failure, thereby it is of limited application.The need exploitation is a kind of has a surplus in Austenitic Manganese Steel toughness, the resistance to abrasion deficiency, and white cast iron uses the wear-resistant material that uses under insecure operating mode.
The objective of the invention is the problems referred to above, a kind of new nodular eutectic austenite steel base authigenic composite material preparation method is provided, use lower cost to obtain matrix material, to satisfy actual needs with fine obdurability and resistance to abrasion at prior art.
In order to realize such purpose, the present invention is the advantage of existing wear-resistant material comprehensively, to the molten steel processing of going bad, when solidifying, obtain the nodular eutectic wild phase by alterant, direct acquisition nodular eutectic austenite steel base authigenic composite material under as cast condition.
Concrete technical scheme of the present invention is: the employing china natural resources is abundant, cheap manganese (Mn), silicon (Si), chromium (Cr) alloying element carries out alloying, adopt the solidified structure of metamorphism treatment method control molten steel, under curing condition, directly obtain nodular eutectic wild phase ((Fe, Mn, Cr)
3C and austenite, eutectic microhardness (HV) is: 800-1200.
The composition proportion of molten steel of the present invention is: carbon 0.8-1.8%, manganese 6.0-12.0%, silicon 0.5-2.0%, chromium 0.0-1.2%, sulphur 0.01-0.19%, phosphorus 0.02-0.10%, Yu Tie.Adopt the pig iron, steel scrap, ferromanganese, ferrosilicon, ferrochrome preparation.
The present invention adopts the composition (weight percent) of alterant to be: magnesium 0.00-0.09%, calcium 0.00-0.30%, rare earth (cerium, lanthanum) 0.02-0.09%, silicon 0.4-1.0%, aluminium 0.2-1.0%, copper 0.0-1.0%, titanium 0.0-0.5%, boron 0.000-0.005%, Yu Tie.Adopt alloy preparation alterants such as magnesium rare earth ferrosilicon alloy, silico-calcium rare earth alloy, ferrotianium, electrolytic copper, fine aluminium, ferro-boron.
The present invention adopts intermediate frequency or high frequency induction furnace, the non-oxidizing process melting technology.Behind the pig iron and the scrap melting, add ferromanganese, ferrosilicon, ferrochrome, when temperature reaches 1500 ℃-1600 ℃, insert the aluminium deoxidation tapping.In bag, add alterant (or adopting the method that pours) and handle, stir, in the time of 1450 ℃-1500 ℃, in sand mold or metal mold, cast.Under as cast condition, directly obtain nodular eutectic austenite steel base authigenic composite material.
Below further describe technical scheme of the present invention by specific embodiment.
Embodiment 1:
The composition proportion of molten steel is: carbon 1.21%, manganese 7.32%, silicon 0.89%, chromium 0.5%, sulphur 0.025%, phosphorus 0.020%, Yu Tie.Adopt the pig iron, steel scrap, ferromanganese, ferrosilicon, ferrochrome preparation.
The composition of alterant (weight percent) is: magnesium 0.06%, rare earth (cerium, lanthanum) 0.08%, silicon 0.4%, aluminium 0.5%, copper 0.5%, titanium 0.2%, boron 0.002%, Yu Tie.Adopt magnesium rare earth ferrosilicon alloy, ferrotianium, electrolytic copper, fine aluminium, ferro-boron preparation alterant.
Adopt the 5kg medium-frequency induction furnace, the non-oxidizing process melting technology.Behind the pig iron and the scrap melting, add ferromanganese, ferrosilicon, ferrochrome, when temperature reaches 1600 ℃, insert the aluminium deoxidation tapping.In bag, add alterant and handle, stir,, cast at 1450 ℃.In sand mold, cast out 12 * 12 * 60mm sample, 12 * 12 * 60mm sample is worn into detection and the metallographic structure observation that 10 * 10 * 55mm non-notch impact specimen carries out impelling strength and hardness.Under as cast condition, obtain nodular eutectic and strengthen the austenitic steel based composites.It is organized as nodular eutectic and is evenly distributed on the austenitic matrix, and eutectic is of a size of 10 μ m-20 μ m..Impelling strength (impact specimen is the non-notch sample) 29 (J/cm
2), hardness HRC18.5.
Embodiment 2:
The composition proportion of molten steel is: carbon 0.80%, manganese 8.32%, silicon 0.97%, chromium 0.55%, sulphur 0.022%, phosphorus 0.033%, Yu Tie.Adopt the pig iron, steel scrap, ferromanganese, ferrosilicon, ferrochrome preparation.
The composition of alterant (weight percent) is: magnesium 0.05%, rare earth (cerium, lanthanum) 0.03%, calcium 0.15%, silicon 0.6%, aluminium 0.5%, copper 0.45%, titanium 0.2%, boron 0.002%, Yu Tie adopts magnesium rare-earth silicon alloy, silicocalcium, ferrotianium, electrolytic copper, fine aluminium, ferro-boron preparation alterant.
Adopt the 5kg medium-frequency induction furnace, the non-oxidizing process melting technology.Behind the pig iron and the scrap melting, add ferromanganese, ferrosilicon, ferrochrome, when temperature reaches 1600 ℃, insert the aluminium deoxidation tapping.In bag, add alterant and handle, stir,, cast at 1500 ℃.In sand mold, cast out 12 * 12 * 60mm sample, under as cast condition, obtain nodular eutectic and strengthen the austenitic steel based composites.12 * 12 * 60mm sample is worn into detection and the metallographic structure observation that 10 * 10 * 55mm non-notch impact specimen carries out impelling strength and hardness.It is organized as nodular eutectic and is evenly distributed on the austenitic matrix, and eutectic is of a size of 10 μ m-20 μ m.Impelling strength (impact specimen is the non-notch sample) 35.5 (J/cm
2), hardness HRC 10.5.
Embodiment 3:
The composition proportion of molten steel is: carbon 1.33%, manganese 7.81%, silicon 1.05%, chromium 0.45%, sulphur 0.027%, phosphorus 0.032%, Yu Tie.Adopt the pig iron, steel scrap, ferromanganese, ferrosilicon, ferrochrome preparation.
The composition of alterant (weight percent) is: calcium 0.20%, rare earth (cerium, lanthanum) 0.06%, silicon 0.8%, aluminium 0.5%, copper 0.5%, titanium 0.2%, boron 0.001%, Yu Tie.Adopt silico-calcium rare earth alloy, ferrotianium, electrolytic copper, fine aluminium, ferro-boron preparation alterant.
Adopt the 5kg medium-frequency induction furnace, the non-oxidizing process melting technology.Behind the pig iron and the scrap melting, add ferromanganese, ferrosilicon, ferrochrome, when temperature reaches 1600 ℃, insert the aluminium deoxidation tapping.In bag, add alterant and handle, stir,, cast at 1460 ℃.In sand mold, cast out 12 * 12 * 60mm sample, obtain nodular eutectic and strengthen the austenite-bainite steel base matrix material.12 * 12 * 60mm sample is worn into detection and the metallographic structure observation that 10 * 10 * 55mm non-notch impact specimen carries out impelling strength and hardness.It is organized as nodular eutectic and is evenly distributed on the austenitic matrix, and eutectic is of a size of 10 μ m-20 μ m.Impelling strength (impact specimen is the non-notch sample) 27 (J/cm
2), hardness HRC 22.5.
Good effect of the present invention is that this advanced composite material (ACM) with the Development of Wear Resistant Steel ratio, has overcome single matrix, Do not have the shortcoming of wild phase, and kept tough matrix; With the alloy cast iron ratio, overcome toughness not The shortcoming of foot has kept the nodular eutectic with strong opposing abrasive wear ability; With the wear-resistant spheroidal cast iron ratio, Because the nodular eutectic of high rigidity has replaced the extremely low group's globular graphite that exists with the cavity of hardness, and has High wear resistence, and overcome graphite in the abrasive wear process owing to the distortion become formation of crack to wear resistence The adverse effect of bringing. The raw material that the present invention takes is easy to get, and is with low cost, the advanced composite material (ACM) tool that obtains Excellent obdurability and wearability are arranged, use under the low stress impact abrasive wear operating mode in can be used for being manufactured on Easily grind part.
Claims (2)
1, a kind of nodular eutectic austenite steel base authigenic composite material preparation method is characterized in that by alterant the molten steel processing of going bad is obtained the nodular eutectic wild phase when solidifying, under as cast condition, directly obtain, the composition proportion of molten steel is: carbon 0.8-1.8%, manganese 6.0-12.0%, silicon 0.5-2.0%, chromium 0.0-1.2%, sulphur 0.01-0.19%, phosphorus 0.02-0.10%, Yu Tie, the composition of alterant is: magnesium 0.00-0.09%, calcium 0.00-0.30%, rare earth (cerium, lanthanum) 0.02-0.09%, silicon 0.4-1.0%, aluminium 0.2-1.0%, copper 0.0-1.0%, titanium 0.0-0.5%, boron 0.000-0.005%, Yu Tie.
2, as the said nodular eutectic austenite steel base authigenic composite material preparation method of claim 1, it is characterized in that molten steel adopts the pig iron, steel scrap, ferromanganese, ferrosilicon, ferrochrome preparation, alterant adopts magnesium rare earth ferrosilicon alloy, silico-calcium rare earth alloy, ferrotianium, electrolytic copper, fine aluminium, ferro-boron preparation.
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| CN102080178B (en) * | 2004-02-08 | 2012-12-19 | 昆明理工大学 | Quasi-casting high toughness bainitic low-carbon ductile iron and producing method thereof |
| CN100415920C (en) * | 2006-09-05 | 2008-09-03 | 郑州航空工业管理学院 | Intermediate alloy in use for wear resisting steel iron material, and usage |
| CN100453681C (en) * | 2006-12-22 | 2009-01-21 | 西安交通大学 | High boron wear-resisting casting steel and preparation process thereof |
| CN102255269B (en) * | 2011-06-24 | 2013-08-28 | 乐山科杰发电力器材有限公司 | Energy-saving compression type strain clamp |
| CN102222873B (en) * | 2011-06-24 | 2014-02-26 | 乐山科杰发电力器材有限公司 | Energy-saving bolt-type strain clamp |
| CN102361306B (en) * | 2011-06-24 | 2013-08-28 | 乐山科杰发电力器材有限公司 | Energy-saving suspension wire clamp |
| CN103243196B (en) * | 2013-05-15 | 2015-10-07 | 中国科学院金属研究所 | A kind of intermediate frequency furnace adds the method that rare earth sublimate is smelted |
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