CN102581260A - Method for casting bimetallic wear-resistant bucket teeth - Google Patents
Method for casting bimetallic wear-resistant bucket teeth Download PDFInfo
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- CN102581260A CN102581260A CN2012100973064A CN201210097306A CN102581260A CN 102581260 A CN102581260 A CN 102581260A CN 2012100973064 A CN2012100973064 A CN 2012100973064A CN 201210097306 A CN201210097306 A CN 201210097306A CN 102581260 A CN102581260 A CN 102581260A
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Abstract
A method for casting bimetallic wear-resistant bucket teeth belongs to the field of metal materials. The method is characterized in that chemical components of bainite steel at the tip of each bucket tooth include, in weight percent, 0.4-0.6% of C (carbon), 1.5-2.0% of Si (silicon), 1.2-2.0% of Mn (manganese) and 1.5-2.5% of Cr (chromium), chemical components of low-carbon steel at the root of each bucket tooth in weight percent include 0.27-0.33% of C, 0.5-0.8% of Si, 0.8-1.2% of Mn and 1.5-2.0% of Cr, the bainite steel is firstly melted and cast into a lost foam mold when in casting, the low-carbon steel is cast by controlling the solidification volume fraction solid rate of the bainite steel to range from 0.6 to 0.9, the low-carbon steel is normalized at the temperature ranging from 900 DEG C to 1000 DEG C after solidification, and the low-carbon steel is tempered at the temperature ranging from 200 DEG C to 300 DEG C. The hardness of the tip of each tooth is higher than HRC (Rockwell hardness) 53, and wear resistance is excellent. The impact toughness ak of the root of each tooth is higher than 80J/cm2, the service life of the teeth is twice longer than that of a like product, and the cost of the teeth is not higher than the production cost of the like product.
Description
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Technical field
The invention belongs to metal material field, what relate to is a kind of casting method of bimetal wear resistant bucket tooth.
Background technology
Bainitic steel C:0.4-0.6%, Si:1.5-2.0%, Mn:1.2-2.0%, Cr:1.5-2.5% has fine anti-wear performance, but its toughness is not enough, in the wear-resisting bucket tooth of being everlasting, bucket tooth root phenomenon of rupture can take place, and influences the application of bucket tooth.Existing bimetallic bucket tooth is the method that adopts built-up welding.Limited by method, overlay cladding is very thin, and the carbide alloy cost of built-up welding is very high.So be difficult to use.In production practices, do not use always.And adopt the method difficulty of casting very big.1, two kind of Material Selection, requirement can mutually wettingly can be adopted same Technology for Heating Processing again and obtain corresponding tissue.How 2 two kinds of material fusions in casting process realize metallurgical melting rather than mechanical bond.3 are prone to slag in the two-phase casting process, intractable so that two combines bad.
Summary of the invention
The present invention seeks to produce two kinds of bad problems of the fusion of material in casting process of bimetallic bucket tooth in order to solve the method that adopts casting.
A kind of casting method of bimetal wear resistant bucket tooth is characterized in that the root of high tenacity mild steel as bucket tooth, the crown of Wear Resisting Bainitic Steel as bucket tooth, with the casting method of disappearance mould it is cast in together, forms the wear-resisting bucket tooth of root high tenacity crown.The chemical composition mass percent of the bainitic steel that the bucket tooth crown partly adopts is: C:0.4-0.6%; Si:1.5-2.0%, Mn:1.2-2.0%, Cr:1.5-2.5%; The chemical composition mass percent of the mild steel that the bucket tooth root adopts is: C:0.27-0.33%; Si:0.5-0.8%, Mn:0.8-1.2%, Cr:1.5-2.0%.During casting at first with the bainitic steel melted for pouring in the disappearance mould, control its coagulated volume mark solid rate and in the 0.6-0.9 scope, pour into a mould mild steel, after solidifying through 900-1000 ℃ of normalizings, 200--300 ℃ of tempering.
The present invention can make mild steel and fine the fusing together of bainitic steel ability, has formed root and has had fine toughness, and crown portion has the bucket tooth of fine anti-wear performance.
When solidifying the solid rate volume fraction less than 0.6 the time, can form to dash at transition zone and mix layer, after heat treatment, form a kind of fragility phase, very easily fracture; Greater than 0.9 o'clock, two-phase can not fuse, and appearance obviously connects stubble even intermittently connects phenomenon and do not connect phenomenon.Only when 0.6---0.9, could fine fusion be frozen into one.
The present invention obtains the pearlitic tissue of crown portion bainite and tooth root portion through 900-1000 ℃ of normalizings.Crown portion hardness is greater than HRC53, and wearability is splendid; And the impact flexibility ak of tooth root portion " 80J/cm
2, reaching more than 2 times of like product service life, cost is no more than the production cost of like product.
Specific embodiments
Embodiment 1
With bainitic steel crown part: C:0.4-0.6%, Si:1.5-2.0%, Mn:1.2-0.2%, Cr:1.5-2.5% prepares by batching; The root of mild steel bucket tooth is pressed C:0.27-0.33%, Si:0.5-0.8%, Mn:0.8-1.2%, Cr:1.5-2.0% prepares; With its fusing, at first bainitic steel is poured in the disappearance mould, controlling its solidifying phase volume fraction is 0.6; And then the cast mild steel molten steel, after solidifying through 900--1000 ℃ of normalizing, 200--300 ℃ of tempering.Assay: crown hardness is HRC53.5,54,54.2; Tooth root ak value is 85,86,85.5J/cm
2Embodiment 2: the composition by scheme 1 carries out melting, and controlling its solidifying phase volume fraction during cast is 0.8, and then the molten steel of cast mild steel; After solidifying through 900--1000 ℃ of normalizing; 200--300 ℃ of tempering. assay: crown hardness is HRC55,56.2,55.8; Tooth root ak value is 89,90,89.5J/cm
2
Embodiment 3: the composition by scheme 1 carries out melting, and controlling its solidifying phase volume fraction during cast is 0.9, and then the molten steel of cast mild steel; After solidifying through 900--1000 ℃ of normalizing; 200--300 ℃ of tempering. assay: crown hardness is HRC56,56.4,55.2; Tooth root ak value is 80,80.8,81.2J/cm
2
Claims (1)
1. the casting method of a bimetal wear resistant bucket tooth; It is characterized in that the root of high tenacity mild steel as bucket tooth; The crown of Wear Resisting Bainitic Steel as bucket tooth, with the casting method of disappearance mould it is cast in together, form the wear-resisting bucket tooth of root high tenacity crown; The chemical composition mass percent of the bainitic steel that the bucket tooth crown partly adopts is: C:0.4-0.6%; Si:1.5-2.0%, Mn:1.2-2.0%, Cr:1.5-2.5%; The chemical composition mass percent of the mild steel that the bucket tooth root adopts is: C:0.27-0.33%; Si:0.5-0.8%, Mn:0.8-1.2%, Cr:1.5-2.0%; During casting at first with the bainitic steel melted for pouring in the disappearance mould, control its coagulated volume mark solid rate and in the 0.6-0.9 scope, pour into a mould mild steel, after solidifying through 900-1000 ℃ of normalizings, 200--300 ℃ of tempering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100973064A CN102581260A (en) | 2012-04-05 | 2012-04-05 | Method for casting bimetallic wear-resistant bucket teeth |
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| CN2012100973064A CN102581260A (en) | 2012-04-05 | 2012-04-05 | Method for casting bimetallic wear-resistant bucket teeth |
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| CN102581260A true CN102581260A (en) | 2012-07-18 |
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| CN2012100973064A Pending CN102581260A (en) | 2012-04-05 | 2012-04-05 | Method for casting bimetallic wear-resistant bucket teeth |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102847880A (en) * | 2012-09-07 | 2013-01-02 | 杨邦树 | Special material co-casting cast mold and special material co-casting cast production process |
| CN103357819A (en) * | 2013-07-19 | 2013-10-23 | 宁波吉威熔模铸造有限公司 | Bucket tooth investment casting method |
| CN104226898A (en) * | 2012-10-22 | 2014-12-24 | 宁波吉威熔模铸造有限公司 | Investment casting method for bucket tooth |
| CN104846871A (en) * | 2015-05-05 | 2015-08-19 | 柳州金特新型耐磨材料股份有限公司 | Wear-resisting bucket tooth for loader |
| CN105316585A (en) * | 2015-10-28 | 2016-02-10 | 安徽省三方新材料科技有限公司 | High-chrome low-carbon steel abrasion-resistant bucket tooth top |
| CN111074169A (en) * | 2019-12-25 | 2020-04-28 | 舞阳钢铁有限责任公司 | Bainite ultrahigh-strength wear-resistant steel plate and production method thereof |
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| CN1041551A (en) * | 1988-10-05 | 1990-04-25 | 国家机械工业委员会沈阳铸造研究所 | Electric slag smelting founding bimetallic electric scoop teeth and technology |
| WO1992011962A1 (en) * | 1991-01-03 | 1992-07-23 | Montupet S.A. | Method of obtaining cast composite cylinder heads |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102847880A (en) * | 2012-09-07 | 2013-01-02 | 杨邦树 | Special material co-casting cast mold and special material co-casting cast production process |
| CN102847880B (en) * | 2012-09-07 | 2015-04-08 | 安岳县金龙机械制造有限公司 | Special material co-casting cast production process |
| CN104226898A (en) * | 2012-10-22 | 2014-12-24 | 宁波吉威熔模铸造有限公司 | Investment casting method for bucket tooth |
| CN103357819A (en) * | 2013-07-19 | 2013-10-23 | 宁波吉威熔模铸造有限公司 | Bucket tooth investment casting method |
| CN104846871A (en) * | 2015-05-05 | 2015-08-19 | 柳州金特新型耐磨材料股份有限公司 | Wear-resisting bucket tooth for loader |
| CN105316585A (en) * | 2015-10-28 | 2016-02-10 | 安徽省三方新材料科技有限公司 | High-chrome low-carbon steel abrasion-resistant bucket tooth top |
| CN111074169A (en) * | 2019-12-25 | 2020-04-28 | 舞阳钢铁有限责任公司 | Bainite ultrahigh-strength wear-resistant steel plate and production method thereof |
| CN111074169B (en) * | 2019-12-25 | 2021-08-24 | 舞阳钢铁有限责任公司 | Bainite ultrahigh-strength wear-resistant steel plate and production method thereof |
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Application publication date: 20120718 |