CN104911500A - Low-temperature wear-resistant carriage and manufacturing method thereof - Google Patents
Low-temperature wear-resistant carriage and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a low-temperature wear-resistant carriage and a manufacturing method thereof. The low-temperature wear-resistant carriage comprises the following chemical ingredients in percentage by weight: 0.30-0.40% of C, 0.20-0.40% of Si, 0.75-0.90% of Mn, 0.90-1.1% of Cr, 0.08-0.12% of Mo, 0.06-0.12% of V, 0.02-0.08% of Al, not greater than 0.04% of S, not greater than 0.04% of P, not greater than 0.3% of Ni, not greater than 0.3% of Cu and the balance of Fe. The manufacturing method for the low-temperature wear-resistant carriage comprises the following steps: 1) core preparation; 2) shaping; 3) melting; 4) casting; and 5) heat treatment. The low-temperature wear-resistant carriage produced by the manufacturing method disclosed by the invention is good in mechanical property, and high in strength, hardness and wear resistance, wherein the yield strength is not less than 550Mpa, the tensile strength is not less than 700Mpa, the percentage elongation after fracture is not less than 12%, the percentage reduction of area is not less than 20%, the low-temperature impact toughness (-60 DEG C) is not less than 2J/cm<2>, and the hardness achieves 250-340HB.
Description
Technical field
The present invention relates to the wear-resisting planker of a kind of low temperature and manufacture method thereof.
Background technology
China is big country in foundry, and the dust pollution that the molding material of casting sand type casting brings in Foundry Production, atmospheric pollution and solid pollution are the most serious.It has been extremely urgent that all kinds of foundry goods adopts the V with process characteristics such as energy-conservation, efficient, environmental protection and high-quality to send out casting technique casting.
As shown in Figure 1 or 2, front row bottom planker 01 has left and right side opening 02,03, rear row bottom planker 01 also has left and right side opening 04,05, the structure relative complex of this planker 01, therefore, can also enhance productivity and reduce production cost while adopting what kind of production technique guarantee planker mechanical property is the difficult problem that will overcome at present.
Summary of the invention
In order to solve deficiency of the prior art, the object of the present invention is to provide the wear-resisting planker of a kind of low temperature and manufacture method thereof, the wear-resisting planker of this low temperature has excellent mechanical property and higher hardness, and has high impact toughness under low temperature.
For achieving the above object, the present invention is by the following technical solutions:
The wear-resisting planker of a kind of low temperature, the weight percent of the chemical composition of the wear-resisting planker of described low temperature is: C 0.30-0.40%; Si 0.20-0.40%; Mn 0.75-0.90%; Cr 0.90-1.1%; Mo 0.08-0.12%; V 0.06-0.12%; Al 0.02-0.08%; S≤0.04%; P≤0.04%; Ni≤0.3%; Cu≤0.3%; Surplus is Fe.
The manufacture method of the wear-resisting planker of above-mentioned low temperature comprises the following steps:
1) coremaking: take following core batching by weight respectively: chromite sand 93-96.5 part, alkalescent phenol resin 2-4 part, organic ester curing agent 0.5-1.5 part, cavings is 1-1.5 part by weight; Insert die for making core after above-mentioned core batching is put into sand mill mulling, after certainly hard, the demoulding obtains core;
2) moulding: adopt obtained top part moulding and the flask drag moulding respectively of V method casting technique, above-mentioned obtained core is put on the fixed position of lower impressions, then mould assembling is carried out in top part moulding and flask drag moulding, and place sprue cup;
3) melting: by the chemical composition of the wear-resisting planker of low temperature, 40 chromium steel bits, steel scrap, carburelant, silicomanganese, low carbon ferrochromium, vanadium iron and molybdenum-iron are added in induction furnace and carries out melting, the temperature of melting is 1610-1630 DEG C, after melting form molten steel completely, in molten steel, add the aluminium accounting for Metal Weight 0.12-0.14% carry out deoxidation treatment;
4) cast: injected in die cavity by the molten steel after above-mentioned deoxidation treatment, temperature during casting is 1530-1580 DEG C, and the duration of pouring is 40-50 second, unpack after cooling and take out foundry goods;
5) thermal treatment: the obtained wear-resisting planker of low temperature after above-mentioned foundry goods being carried out modifier treatment.
In step 5), modifier treatment is carried out to foundry goods, specifically comprise the following steps: first foundry goods is incubated at the temperature of 890-910 DEG C, be incubated and adopt organic hardening liquid to quench after 4 hours; Again the foundry goods after quenching is carried out tempering, the holding temperature of tempering is 570-590 DEG C, is incubated and adopts organic hardening liquid to cool after 4 hours.
The present invention adopts above technical scheme, has the following advantages:
1, the wear-resisting planker of low temperature that the present invention produces has good mechanical property, and has high strength, high rigidity and high-wearing feature.Wherein, yield strength>=550Mpa, tensile strength>=700Mpa, elongation after fracture>=12%, relative reduction in area>=20%, low-temperature impact toughness (-60 DEG C)>=2J/cm
2, hardness reaches 250-340HB.
2, manufacture method of the present invention adopts the new proportioning of core, solve crucial shrinkage porosity defect of contraction cavity not using under conformal external chill and internal chill process condition, and scab rate is low, sand removal is easy.
3, manufacturing approach craft of the present invention is simple, and production cost is low, adapts to batch production.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details:
Fig. 1 is the front view of the present invention's planker to be prepared;
Fig. 2 is the vertical view of the present invention's planker to be prepared;
The schema of Fig. 3 manufacture method of the present invention.
Embodiment
The wear-resisting planker of a kind of low temperature of the present invention, the weight percent of the chemical composition of the wear-resisting planker of described low temperature is: C 0.30-0.40%; Si 0.20-0.40%; Mn 0.75-0.90%; Cr 0.90-1.1%; Mo 0.08-0.12%; V 0.06-0.12%; Al 0.02-0.08%; S≤0.04%; P≤0.04%; Ni≤0.3%; Cu≤0.3%; Surplus is Fe.
As shown in Figure 3, the manufacture method of the wear-resisting planker of above-mentioned low temperature comprises the following steps:
1) coremaking: take following core batching by weight respectively: chromite sand 93-96.5 part, alkalescent phenol resin 2-4 part, organic ester curing agent 0.5-1.5 part, cavings is 1-1.5 part by weight; Insert die for making core after above-mentioned core batching is put into sand mill mulling, after certainly hard, the demoulding obtains core;
2) moulding: adopt obtained top part moulding and the flask drag moulding respectively of V method casting technique, top part moulding has upper impression, flask drag moulding has lower impressions, above-mentioned obtained core is put on the fixed position of lower impressions, again mould assembling is carried out in top part moulding and flask drag moulding, the die cavity that the two inner formation one is complete, and place sprue cup;
3) melting: by the chemical composition of the wear-resisting planker of low temperature, 40 chromium steel bits, steel scrap, carburelant, silicomanganese, low carbon ferrochromium, vanadium iron and molybdenum-iron are added in induction furnace and carries out melting, the temperature of melting is 1610-1630 DEG C, after melting form molten steel completely, in molten steel, add the aluminium accounting for Metal Weight 0.12-0.14% carry out deoxidation treatment;
4) cast: injected in die cavity by the molten steel after above-mentioned deoxidation treatment, temperature during casting is 1530-1580 DEG C, and the duration of pouring is 40-50 second, unpack after cooling and take out foundry goods;
5) thermal treatment: the obtained wear-resisting planker of low temperature after above-mentioned foundry goods being carried out modifier treatment.
In step 5), modifier treatment is carried out to foundry goods, specifically comprise the following steps: first foundry goods is incubated at the temperature of 890-910 DEG C, be incubated and adopt organic hardening liquid to quench after 4 hours; Again the foundry goods after quenching is carried out tempering, the holding temperature of tempering is 570-590 DEG C, is incubated and adopts organic hardening liquid to cool after 4 hours.
Embodiment 1:
The weight percent of the chemical composition of the wear-resisting planker of low temperature is: C 0.30%; Si 0.30%; Mn 0.75%; Cr 1.1%; Mo 0.08%; V 0.08%; Al 0.02%; S 0.04%; P 0.009%; Ni 0.10%; Cu 0.30%; Surplus is Fe.
The manufacture method of the wear-resisting planker of above-mentioned low temperature comprises the following steps:
1) coremaking: take following core batching by weight respectively: chromite sand 96.5 parts; Alkalescent phenol resin 2 parts; Organic ester curing agent 0.5 part; Cavings 1 part; Insert die for making core after above-mentioned core batching is put into sand mill mulling, after certainly hard, the demoulding obtains core;
2) moulding: adopt obtained top part moulding and the flask drag moulding respectively of V method casting technique, above-mentioned obtained core is put on the fixed position of lower impressions, then mould assembling is carried out in top part moulding and flask drag moulding, and place sprue cup;
3) melting: by the chemical composition of the wear-resisting planker of low temperature, 40 chromium steel bits, steel scrap, carburelant, silicomanganese, low carbon ferrochromium, vanadium iron and molybdenum-iron are added in induction furnace and carries out melting, the temperature of melting is 1610 DEG C, after melting form molten steel completely, in molten steel, add the aluminium accounting for Metal Weight 0.12% carry out deoxidation treatment;
4) cast: injected in die cavity by the molten steel after above-mentioned deoxidation treatment, temperature during casting is 1530 DEG C, and the duration of pouring is 40 seconds, unpack after cooling and take out foundry goods;
5) thermal treatment: the obtained wear-resisting planker of low temperature after above-mentioned foundry goods being carried out modifier treatment.Modifier treatment specifically comprises the following steps: be first incubated at the temperature of 890 DEG C by foundry goods, is incubated and adopts organic hardening liquid to quench after 4 hours; Again the foundry goods after quenching is carried out tempering, the holding temperature of tempering is 570 DEG C, is incubated and adopts organic hardening liquid to cool after 4 hours.
The yield strength of the wear-resisting planker of the low temperature prepared is 555Mpa, and tensile strength is 700Mpa, and elongation after fracture is 12.6%, and relative reduction in area is 20.5%, and low-temperature impact toughness (-60 DEG C) is 2.8J/cm
2, hardness reaches 269HB.
Embodiment 2:
The weight percent of the chemical composition of the wear-resisting planker of low temperature is: C 0.40%; Si 0.20%; Mn 0.90%; Cr 1.0%; Mo 0.10%; V 0.12%; Al 0.08%; S 0.12%; P 0.01%; Ni 0.15%; Cu 0.18%; Surplus is Fe.
The manufacture method of the wear-resisting planker of above-mentioned low temperature comprises the following steps:
1) coremaking: take following core batching by weight respectively: chromite sand 95 parts, alkalescent phenol resin 4 parts, organic ester curing agent 1 part, cavings 1.25 parts by weight; Insert die for making core after above-mentioned core batching is put into sand mill mulling, after certainly hard, the demoulding obtains core;
2) moulding: adopt obtained top part moulding and the flask drag moulding respectively of V method casting technique, above-mentioned obtained core is put on the fixed position of lower impressions, then mould assembling is carried out in top part moulding and flask drag moulding, and place sprue cup;
3) melting: by the chemical composition of the wear-resisting planker of low temperature, 40 chromium steel bits, steel scrap, carburelant, silicomanganese, low carbon ferrochromium, vanadium iron and molybdenum-iron are added in induction furnace and carries out melting, the temperature of melting is 1630 DEG C, after melting form molten steel completely, in molten steel, add the aluminium accounting for Metal Weight 0.14% carry out deoxidation treatment;
4) cast: injected in die cavity by the molten steel after above-mentioned deoxidation treatment, temperature during casting is 1580 DEG C, and the duration of pouring is 50 seconds, unpack after cooling and take out foundry goods;
5) thermal treatment: the obtained wear-resisting planker of low temperature after above-mentioned foundry goods being carried out modifier treatment.Modifier treatment specifically comprises the following steps: be first incubated at the temperature of 910 DEG C by foundry goods, is incubated and adopts organic hardening liquid to quench after 4 hours; Again the foundry goods after quenching is carried out tempering, the holding temperature of tempering is 590 DEG C, is incubated and adopts organic hardening liquid to cool after 4 hours.
The yield strength of the wear-resisting planker of the low temperature prepared is 580Mpa, and tensile strength is 750Mpa, and elongation after fracture is 12.3%, and relative reduction in area is 20.8%, and low-temperature impact toughness (-60 DEG C) is 2.1J/cm
2, hardness reaches 330HB.
Embodiment 3:
The weight percent of the chemical composition of the wear-resisting planker of low temperature is: C 0.35%; Si 0.40%; Mn 0.83%; Cr 0.90%; Mo 0.12%; V 0.06%; Al 0.05%; S 0.02%; P 0.04%; Ni 0.13%; Cu 0.30%; Surplus is Fe.
The manufacture method of the wear-resisting planker of above-mentioned low temperature comprises the following steps:
1) coremaking: take following core batching by weight respectively: chromite sand 93 parts, alkalescent phenol resin 3 parts, organic ester curing agent 1.5 parts, cavings 1.5 parts by weight; Insert die for making core after above-mentioned core batching is put into sand mill mulling, after certainly hard, the demoulding obtains core;
2) moulding: adopt obtained top part moulding and the flask drag moulding respectively of V method casting technique, above-mentioned obtained core is put on the fixed position of lower impressions, then mould assembling is carried out in top part moulding and flask drag moulding, and place sprue cup;
3) melting: by the chemical composition of the wear-resisting planker of low temperature, 40 chromium steel bits, steel scrap, carburelant, silicomanganese, low carbon ferrochromium, vanadium iron and molybdenum-iron are added in induction furnace and carries out melting, the temperature of melting is 1620 DEG C, after melting form molten steel completely, in molten steel, add the aluminium accounting for Metal Weight 0.13% carry out deoxidation treatment;
4) cast: injected in die cavity by the molten steel after above-mentioned deoxidation treatment, temperature during casting is 1560 DEG C, and the duration of pouring is 45 seconds, unpack after cooling and take out foundry goods;
5) thermal treatment: the obtained wear-resisting planker of low temperature after above-mentioned foundry goods being carried out modifier treatment.Modifier treatment specifically comprises the following steps: be first incubated at the temperature of 900 DEG C by foundry goods, is incubated and adopts organic hardening liquid to quench after 4 hours; Again the foundry goods after quenching is carried out tempering, the holding temperature of tempering is 580 DEG C, is incubated and adopts organic hardening liquid to cool after 4 hours.
The yield strength of the wear-resisting planker of the low temperature prepared is 560Mpa, and tensile strength is 741Mpa, and elongation after fracture is 12.7%, and relative reduction in area is 20.2%, and low-temperature impact toughness (-60 DEG C) is 2.4J/cm
2, hardness reaches 295HB.
Claims (3)
1. the wear-resisting planker of low temperature, is characterized in that: the weight percent of the chemical composition of the wear-resisting planker of described low temperature is: C 0.30-0.40%; Si 0.20-0.40%; Mn 0.75-0.90%; Cr 0.90-1.1%; Mo 0.08-0.12%; V 0.06-0.12%; Al 0.02-0.08%; S≤0.04%; P≤0.04%; Ni≤0.3%; Cu≤0.3%; Surplus is Fe.
2. the manufacture method of the wear-resisting planker of a kind of low temperature according to claim 1, is characterized in that: described manufacture method comprises the following steps:
1) coremaking: take following core batching by weight respectively: chromite sand 93-96.5 part, alkalescent phenol resin 2-4 part, organic ester curing agent 0.5-1.5 part, cavings is 1-1.5 part by weight; Insert die for making core after above-mentioned core batching is put into sand mill mulling, after certainly hard, the demoulding obtains core;
2) moulding: adopt obtained top part moulding and the flask drag moulding respectively of V method casting technique, above-mentioned obtained core is put on the fixed position of lower impressions, then mould assembling is carried out in top part moulding and flask drag moulding, and place sprue cup;
3) melting: by the chemical composition of the wear-resisting planker of low temperature, 40 chromium steel bits, steel scrap, carburelant, silicomanganese, low carbon ferrochromium, vanadium iron and molybdenum-iron are added in induction furnace and carries out melting, the temperature of melting is 1610-1630 DEG C, after melting form molten steel completely, in molten steel, add the aluminium accounting for Metal Weight 0.12-0.14% carry out deoxidation treatment;
4) cast: injected in die cavity by the molten steel after above-mentioned deoxidation treatment, temperature during casting is 1530-1580 DEG C, and the duration of pouring is 40-50 second, unpack after cooling and take out foundry goods;
5) thermal treatment: the obtained wear-resisting planker of low temperature after above-mentioned foundry goods being carried out modifier treatment.
3. the manufacture method of the wear-resisting planker of a kind of low temperature according to claim 1, it is characterized in that: in step 5), modifier treatment is carried out to foundry goods, specifically comprise the following steps: first foundry goods is incubated at the temperature of 890-910 DEG C, be incubated and adopt organic hardening liquid to quench after 4 hours; Again the foundry goods after quenching is carried out tempering, the holding temperature of tempering is 570-590 DEG C, is incubated and adopts organic hardening liquid to cool after 4 hours.
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Cited By (3)
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| CN107312965A (en) * | 2017-07-05 | 2017-11-03 | 天长市兴宇铸造有限公司 | A kind of method of smelting of alloy Investment Steel Castings |
| CN109554633A (en) * | 2018-12-25 | 2019-04-02 | 成都永益泵业股份有限公司 | The preparation method of resistant material and phosphoric acid material pulp pump |
| EP3730656A4 (en) * | 2017-12-22 | 2020-10-28 | Posco | Wear-resistant steel having excellent hardness and impact toughness, and method for producing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107312965A (en) * | 2017-07-05 | 2017-11-03 | 天长市兴宇铸造有限公司 | A kind of method of smelting of alloy Investment Steel Castings |
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