CN103741025A - Method for preparing boron-containing micro-alloy steel by using boron-containing pig iron as boron charging agent - Google Patents
Method for preparing boron-containing micro-alloy steel by using boron-containing pig iron as boron charging agent Download PDFInfo
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Abstract
The invention provides a method for preparing boron-containing micro-alloy steel by using boron-containing pig iron as a boron charging agent, and belongs to the technical field of metallurgy. The method comprises the following steps: (1) preparing industrial pure iron, the boron-containing pig iron, ferro-titanium, manganese metal, iron-carbon alloy, ferro-silicon alloy and pure aluminium serving as raw materials according to predetermined components; (2) adding the prepared industrial pure iron and iron-carbon alloy to an induction furnace, melting the materials, sequentially adding the ferro-silicon alloy, the pure aluminium, the ferro-titanium, the manganese metal and the boron-containing pig iron, melting under a vacuum condition, and feeding argon for refinement; (3) after ending refinement, casting into cast ingots, then heating to 1200+/-10 DEG C, and preserving heat for 0.5-2 hours; (4) rolling the cast ingots subjected to heat preservation by two stages; and carrying out final rolling, thus obtaining roll steel; and (5) continuously cooling the roll steel to 530-560 DEG C at the rate of 40-50 DEG C/s, and then carrying out air cooling to room temperature, thus obtaining the boron-containing micro-alloy steel. The method has the advantages that the composite cost is low, the industrialization is easy to realize, and the prepared product has excellent performances and good application prospect.
Description
Technical field
The invention belongs to metallurgical technology field, particularly a kind ofly take pig iron containing boron and as adding boron agent, prepare the method for Boron Bearing Microalloy Steel.
Background technology
The pig iron containing boron that utilizes blast furnace iron boron separation process scheme to obtain, has the features such as convenient sources, low price, stable performance, mainly as the additive of boron for the production of antifriction cast iron.In order more reasonably to utilize limited boron resource, it is main that paigeite is adhered to extracting boron-rich slag, and remaining pig iron containing boron can be used in other side.
Utilizing the direct smelting boron steel of pig iron containing boron is a research topic that has practical significance, rationally utilizes paigeite resource.The boron steel that the pig iron containing boron of directly usining is smelted as raw material, less demanding to the grade height of boron in pig iron containing boron, due to silicon in pig iron containing boron and sulphur content higher, need carry out abundant desiliconization and desulfurization to pig iron containing boron; In pig iron containing boron, boron content is about 0.20 ~ 1.0%, and in the boron-containing steel that guarantees to smelt, boron content is in the scope of GB regulation (≤0.0040%), most of boron is directly oxidized or nitrogenize in smelting process, causes the actual recovery rate of boron on the low side; In order to make full use of the boron in pig iron containing boron, to the recycling of pig iron containing boron, need to look for another way.With pig iron containing boron replacement ferro-boron, as the additive of boron in steel, preparing boron steel is new a trial, but the composition of contrast pig iron containing boron and ferro-boron is known, in pig iron containing boron, boron content is very low, and C, S content are high a lot, this just causes the S content in steel relatively high, in actual active effect how to utilize the boron in pig iron containing boron while utilizing pig iron containing boron, offsetting the negative influence of impurity S, is current urgent problem.
Summary of the invention
The problems referred to above that exist in smelting boron steel technology for existing pig iron containing boron, the invention provides and a kind ofly take pig iron containing boron and as adding boron agent, prepare the method for Boron Bearing Microalloy Steel, on carbon manganese steel basis, using the additive of pig iron containing boron as boron, add separately trace B element, utilize the controlled rolling rolling of two stages and Controlled cooling process, develop the Boron Bearing Microalloy Steel of high-strong toughness.
Method of the present invention is carried out according to the following steps:
1, press set component and prepare technically pure iron, pig iron containing boron, ferro-titanium, manganese metal, iron-carbon, ferro-silicon and fine aluminium as raw material;
2, the technically pure iron in the raw material of preparation and iron-carbon are joined in induction furnace, under vacuum tightness 1 ~ 10Pa condition by whole material meltings until liquid level is static, then pass into argon gas to vacuum tightness at 3000 ~ 4000Pa, add successively ferro-silicon, fine aluminium, ferro-titanium, manganese metal and pig iron containing boron, under 1580 ~ 1620 ℃ of conditions of temperature, carry out refining, when static to bath surface, complete refining;
3, refining is cast into ingot casting by melt after finishing under vacuum tightness 3000 ~ 4000Pa and 1580 ~ 1600 ℃ of conditions of temperature, then ingot casting is heated to 1200 ± 10 ℃ and be incubated 0.5 ~ 2h;
4, the ingot casting after insulation is carried out to two stage rolling; First stage start rolling temperature is 1000 ~ 1150 ℃, and finishing temperature is 900 ~ 950 ℃, and draught is 40 ~ 60%; Subordinate phase start rolling temperature is 900 ~ 950 ℃, and finishing temperature is 800 ~ 830 ℃, and draught is 70 ~ 80%; Acquisition rolled sheet material after finish to gauge completes;
5, rolled sheet material is cooled to 530 ~ 560 ℃ continuously with the speed of 40 ~ 50 ℃/s, then air cooling, to room temperature, is made Boron Bearing Microalloy Steel, and its composition is by weight percentage containing C 0.08 ~ 0.12%, Si 0.3 ~ 0.4%, Mn 1.5 ~ 1.8%, and Ti 0.03 ~ 0.04%, and B 0.0015 ~ 0.0025%, Al 0.03 ~ 0.05%, S≤0.015%, P≤0.020%, surplus is Fe.
The yield strength of above-mentioned Boron Bearing Microalloy Steel is 700 ~ 750MPa, and tensile strength is 780 ~ 800 MPa, and elongation after fracture is 17 ~ 18%.
The room temperature ballistic work of above-mentioned Boron Bearing Microalloy Steel is 65 ~ 70J, and the ballistic work of-40 ℃ is 64 ~ 66J.
The composition of above-mentioned pig iron containing boron is by weight percentage containing C 3.0 ~ 3.8%, Si 2.0 ~ 3.2%, Mn 0.08 ~ 0.12%, P≤0.06%, S≤0.12%, B 0.20 ~ 1.0%, and surplus is Fe.
The composition of above-mentioned ferro-titanium is by weight percentage containing C 0.25 ~ 0.30%, Si 0.40 ~ 0.50%, V 2.8 ~ 3.0%, P≤0.03%, S≤0.03%, Al 4.2 ~ 4.5%, Ti 69 ~ 71%, and surplus is Fe.
The composition of above-mentioned manganese metal is Mn containing C 0.07 ~ 0.08%, Si 0.30 ~ 0.4%, P≤0.03%, S≤0.03%, Fe 1.5 ~ 1.8%, surplus by weight percentage.
The composition of above-mentioned iron-carbon is by weight percentage containing C 3.10 ~ 4.00%, and surplus is Fe and inevitable impurity.
The composition of above-mentioned ferro-silicon is by weight percentage containing Si 74 ~ 76%, C 0.15 ~ 0.20%, P≤0.040%, S≤0.020%, Al 1.5 ~ 1.8%, and surplus is Fe.
Weight purity >=99% of above-mentioned fine aluminium.
Weight purity >=99% of above-mentioned technically pure iron, weight content≤0.02% of C.
Method of the present invention, by adopting pig iron containing boron as adding boron agent, by refining and rolling condition are set, is made well behaved Boron Bearing Microalloy Steel; In preparation process, do not add the microalloy elements such as alloying elements cr, Mo, Ni etc. and Nb, V that other added value is higher, add less Trace Aluminum and titanium with deoxidation and denitrification, while guarantee smelting, can avoid the oxidized and nitrogenize of boron as far as possible.Method synthesis cost of the present invention is low, is easy to realize industrialization, and the product performance of preparation are good, have a good application prospect.
Embodiment
The iron-carbon adopting in the embodiment of the present invention is to be made by pure iron and graphite melting, and the graphite of employing is commercial high purity graphite, carbon content 99.99%.
The technically pure iron adopting in the embodiment of the present invention, pig iron containing boron, ferro-titanium, manganese metal, ferro-silicon and fine aluminium are commercial product.
The induction furnace adopting in the embodiment of the present invention is vacuum medium frequency induction furnace.
The equipment that is incubated 0.5 ~ 2h employing in the embodiment of the present invention under 1200 ± 10 ℃ of conditions of temperature is electrical heater.
Cooling with the speed of 40 ~ 50 ℃/s in the embodiment of the present invention is that to adopt the water curtain type of cooling to carry out cooling, and speed of cooling is controlled by shower nozzle quantity and the water yield.
The equipment that in the embodiment of the present invention, rolling adopts is university's rolling technique and tandem rolling automatization National Key Laboratory (RAL) northeastward
Φ450 hot rolling units.
In the embodiment of the present invention, product being carried out to performance test is to adopt GB/T 228-2002 metallic substance tensile test at room temperature method and GB GB/T 229-2007 metallic substance summer to test than pendulum impact test method; Impact sample is small sample, is of a size of 55mm * 10mm * 5mm, V-type, and the ballistic work recording is half of standard ballistic work.
Embodiment 1
Press set component and prepare technically pure iron, pig iron containing boron, ferro-titanium, manganese metal, iron-carbon, ferro-silicon and fine aluminium as raw material;
Wherein the composition of pig iron containing boron is by weight percentage containing C 3.1%, Si 2.2%, Mn 0.08 %, P 0.05%, S 0.10%, B 0.85%, and surplus is Fe;
The composition of ferro-titanium is by weight percentage containing C 0.25%, Si 0.43%, V 2.8%, P 0.03%, S 0.03%, Al 4.5%, Ti 69.0%, and surplus is Fe;
The composition of manganese metal is Mn containing C 0.072%, Si 0.30%, P 0.02%, S 0.03%, Fe 1.8%, surplus by weight percentage;
The composition of iron-carbon is by weight percentage containing C 3.10%, and surplus is Fe and inevitable impurity;
The composition of ferro-silicon is by weight percentage containing Si 76%, C 0.15%, P 0.035%, S0.016%, Al 1.8%, and surplus is Fe;
Technically pure iron in the raw material of preparation and iron-carbon are joined in induction furnace, under vacuum tightness 1 ~ 10Pa condition by whole material meltings until liquid level is static, then pass into argon gas to vacuum tightness at 3000 ~ 4000Pa, add successively ferro-silicon, fine aluminium, ferro-titanium, manganese metal and pig iron containing boron, under 1580 ~ 1620 ℃ of conditions of temperature, carry out refining, when static to bath surface, complete refining;
After refining finishes, melt is cast into ingot casting under vacuum tightness 3000 ~ 4000Pa and 1580 ~ 1600 ℃ of conditions of temperature, then ingot casting is heated to 1200 ± 10 ℃ and be incubated 0.5h;
Ingot casting after insulation is carried out to two stage rolling; First stage start rolling temperature is 1130 ℃, and finishing temperature is 940 ℃, and draught is 60%; Subordinate phase start rolling temperature is 900 ℃, and finishing temperature is 800 ℃, and draught is 70%; Acquisition rolled sheet material after finish to gauge completes;
Rolled sheet material is cooled to 560 ℃ continuously with the speed of 40 ~ 50 ℃/s, and then air cooling, to room temperature, is made Boron Bearing Microalloy Steel, and its composition is by weight percentage containing C 0.08%, Si 0.4%, and Mn 1.5%, and Ti 0.04%, and B 0.0015%, S0.011%, P0.016%, surplus is Fe; The yield strength of Boron Bearing Microalloy Steel is 700 ~ 750MPa, and tensile strength is 780 ~ 800 MPa, and elongation after fracture is 17 ~ 18%; Room temperature ballistic work is 65 ~ 70J, and the ballistic work of-40 ℃ is 64 ~ 66J.
Embodiment 2
Press set component and prepare technically pure iron, pig iron containing boron, ferro-titanium, manganese metal, iron-carbon, ferro-silicon and fine aluminium as raw material;
Wherein the composition of pig iron containing boron is by weight percentage containing C 3.4%, Si 2.3%, Mn 0.10%, P 0.05%, S 0.09%, B 0.72%, and surplus is Fe;
The composition of ferro-titanium is by weight percentage containing C 0.30%, Si 0.44%, V 2.9%, P 0.02%, S 0.02%, Al 4.4%, Ti 71.0%, and surplus is Fe;
The composition of manganese metal is Mn containing C 0.074%, Si 0.40%, P 0.03%, S 0.03%, Fe 1.7%, surplus by weight percentage;
The composition of iron-carbon is by weight percentage containing C 4.00%, and surplus is Fe and inevitable impurity;
The composition of ferro-silicon is by weight percentage containing Si 74%, C 0.20%, P0.036%, S 0.016%, Al 1.7%, and surplus is Fe;
Technically pure iron in the raw material of preparation and iron-carbon are joined in induction furnace, under vacuum tightness 1 ~ 10Pa condition by whole material meltings until liquid level is static, then pass into argon gas to vacuum tightness at 3000 ~ 4000Pa, add successively ferro-silicon, fine aluminium, ferro-titanium, manganese metal and pig iron containing boron, under 1580 ~ 1620 ℃ of conditions of temperature, carry out refining, when static to bath surface, complete refining;
After refining finishes, melt is cast into ingot casting under vacuum tightness 3000 ~ 4000Pa and 1580 ~ 1600 ℃ of conditions of temperature, then ingot casting is heated to 1200 ± 10 ℃ and be incubated 1h;
Ingot casting after insulation is carried out to two stage rolling; First stage start rolling temperature is 1080 ℃, and finishing temperature is 920 ℃, and draught is 40%; Subordinate phase start rolling temperature is 950 ℃, and finishing temperature is 830 ℃, and draught is 80%; Acquisition rolled sheet material after finish to gauge completes;
Rolled sheet material is cooled to 560 ℃ continuously with the speed of 40 ~ 50 ℃/s, and then air cooling, to room temperature, is made Boron Bearing Microalloy Steel, and its composition is by weight percentage containing C 0.12%, Si 0.3%, and Mn 1.8%, and Ti 0.03%, and B 0.0025%, S 0.014%, and P 0.017%, and surplus is Fe; The yield strength of Boron Bearing Microalloy Steel is 750MPa, and tensile strength is 780 MPa, and elongation after fracture is 17%; Room temperature ballistic work is 65J, and the ballistic work of-40 ℃ is 64J.
Embodiment 3
Press set component and prepare technically pure iron, pig iron containing boron, ferro-titanium, manganese metal, iron-carbon, ferro-silicon and fine aluminium as raw material;
Wherein the composition of pig iron containing boron is by weight percentage containing C 3.3%, Si 2.9%, Mn 0.11%, P 0.05%, S 0.10%, B 0.20%, and surplus is Fe;
The composition of ferro-titanium is by weight percentage containing C 0.26%, Si 0.45%, V 3.0%, P 0.03%, S 0.02%, Al 4.3%, Ti 69.8%, and surplus is Fe;
The composition of manganese metal is Mn containing C 0.071%, Si 0.35%, P 0.01%, S 0.02%, Fe 1.6%, surplus by weight percentage;
The composition of iron-carbon is by weight percentage containing C 3.62%, and surplus is Fe and inevitable impurity;
The composition of ferro-silicon is by weight percentage containing Si 76%, C 0.17%, P 0.032%, S 0.019%, Al 1.6%, and surplus is Fe;
Technically pure iron in the raw material of preparation and iron-carbon are joined in induction furnace, under vacuum tightness 1 ~ 10Pa condition by whole material meltings until liquid level is static, then pass into argon gas to vacuum tightness at 3000 ~ 4000Pa, add successively ferro-silicon, fine aluminium, ferro-titanium, manganese metal and pig iron containing boron, under 1580 ~ 1620 ℃ of conditions of temperature, carry out refining, when static to bath surface, complete refining;
After refining finishes, melt is cast into ingot casting under vacuum tightness 3000 ~ 4000Pa and 1580 ~ 1600 ℃ of conditions of temperature, then ingot casting is heated to 1200 ± 10 ℃ and be incubated 1.5h;
Ingot casting after insulation is carried out to two stage rolling; First stage start rolling temperature is 1100 ℃, and finishing temperature is 930 ℃, and draught is 50%; Subordinate phase start rolling temperature is 930 ℃, and finishing temperature is 820 ℃, and draught is 75%; Acquisition rolled sheet material after finish to gauge completes;
Rolled sheet material is cooled to 550 ℃ continuously with the speed of 40 ~ 50 ℃/s, and then air cooling, to room temperature, is made Boron Bearing Microalloy Steel, and its composition is by weight percentage containing C 0.11%, Si 0.32%, and Mn 1.65%, and Ti 0.032%, and B 0.0022%, S0.013%, P0.020%, surplus is Fe; The yield strength of Boron Bearing Microalloy Steel is 700MPa, and tensile strength is 800 MPa, and elongation after fracture is 18%; Room temperature ballistic work is 70J, and the ballistic work of-40 ℃ is 66J.
Embodiment 4
Press set component and prepare technically pure iron, pig iron containing boron, ferro-titanium, manganese metal, iron-carbon, ferro-silicon and fine aluminium as raw material;
Wherein the composition of pig iron containing boron is by weight percentage containing C 3.0%, Si 3.2%, Mn 0.08%, P 0.06%, S 0.12%, B 1.0%, and surplus is Fe;
The composition of ferro-titanium is by weight percentage containing C 0.28%, Si 0.40%, V 3.0%, P 0.02%, S 0.03%, Al 4.2%, Ti 70.4%, and surplus is Fe;
The composition of manganese metal is Mn containing C 0.08%, Si 0.39%, P 0.02%, S 0.02%, Fe 1.8%, surplus by weight percentage;
The composition of iron-carbon is by weight percentage containing C 3.54%, and surplus is Fe and inevitable impurity;
The composition of ferro-silicon is by weight percentage containing Si 75%, C 0.19%, P 0.038%, S 0.017%, Al 1.8%, and surplus is Fe;
Technically pure iron in the raw material of preparation and iron-carbon are joined in induction furnace, under vacuum tightness 1 ~ 10Pa condition by whole material meltings until liquid level is static, then pass into argon gas to vacuum tightness at 3000 ~ 4000Pa, add successively ferro-silicon, fine aluminium, ferro-titanium, manganese metal and pig iron containing boron, under 1580 ~ 1620 ℃ of conditions of temperature, carry out refining, when static to bath surface, complete refining;
After refining finishes, melt is cast into ingot casting under vacuum tightness 3000 ~ 4000Pa and 1580 ~ 1600 ℃ of conditions of temperature, then ingot casting is heated to 1200 ± 10 ℃ and be incubated 2h;
Ingot casting after insulation is carried out to two stage rolling; First stage start rolling temperature is 1150 ℃, and finishing temperature is 950 ℃, and draught is 60%; Subordinate phase start rolling temperature is 940 ℃, and finishing temperature is 830 ℃, and draught is 80%; Acquisition rolled sheet material after finish to gauge completes;
Rolled sheet material is cooled to 540 ℃ continuously with the speed of 40 ~ 50 ℃/s, and then air cooling, to room temperature, is made Boron Bearing Microalloy Steel, and its composition is by weight percentage containing C 0.09%, Si 0.36%, and Mn 1.71%, and Ti 0.033%, and B 0.0017%, S 0.011%, and P 0.019%, and surplus is Fe; The yield strength of Boron Bearing Microalloy Steel is 720MPa, and tensile strength is 790 MPa, and elongation after fracture is 17%; Room temperature ballistic work is 68J, and the ballistic work of-40 ℃ is 65J.
Embodiment 5
Press set component and prepare technically pure iron, pig iron containing boron, ferro-titanium, manganese metal, iron-carbon, ferro-silicon and fine aluminium as raw material;
Wherein the composition of pig iron containing boron is by weight percentage containing C 3.8%, Si 2.0%, Mn 0.12%, P 0.04%, S 0.11%, B 0.64%, and surplus is Fe;
The composition of ferro-titanium is by weight percentage containing C 0.29%, Si 0.50%, V 3.0%, P0.03%, S 0.02%, Al 4.5%, Ti 70.6%, and surplus is Fe;
The composition of manganese metal is Mn containing C 0.07%, Si 0.38%, P 0.03%, S 0.03%, Fe 1.5%, surplus by weight percentage;
The composition of iron-carbon is by weight percentage containing C 3.79%, and surplus is Fe and inevitable impurity;
The composition of ferro-silicon is by weight percentage containing Si 74%, C 0.11%, P 0.035%, S 0.018%, Al 1.5%, and surplus is Fe;
Technically pure iron in the raw material of preparation and iron-carbon are joined in induction furnace, under vacuum tightness 1 ~ 10Pa condition by whole material meltings until liquid level is static, then pass into argon gas to vacuum tightness at 3000 ~ 4000Pa, add successively ferro-silicon, fine aluminium, ferro-titanium, manganese metal and pig iron containing boron, under 1580 ~ 1620 ℃ of conditions of temperature, carry out refining, when static to bath surface, complete refining;
After refining finishes, melt is cast into ingot casting under vacuum tightness 3000 ~ 4000Pa and 1580 ~ 1600 ℃ of conditions of temperature, then ingot casting is heated to 1200 ± 10 ℃ and be incubated 2h;
Ingot casting after insulation is carried out to two stage rolling; First stage start rolling temperature is 1000 ℃, and finishing temperature is 900 ℃, and draught is 40%; Subordinate phase start rolling temperature is 910 ℃, and finishing temperature is 810 ℃, and draught is 70%; Acquisition rolled sheet material after finish to gauge completes;
Rolled sheet material is cooled to 530 ℃ continuously with the speed of 40 ~ 50 ℃/s, and then air cooling, to room temperature, is made Boron Bearing Microalloy Steel, and its composition is by weight percentage containing C 0.09%, Si 0.37%, and Mn 1.54%, and Ti 0.031%, and B 0.0019%, S0.015%, P0.018%, surplus is Fe; The yield strength of Boron Bearing Microalloy Steel is 740MPa, and tensile strength is 790 MPa, and elongation after fracture is 18%; Room temperature ballistic work is 69J, and the ballistic work of-40 ℃ is 66J.
Claims (4)
1. the pig iron containing boron of take is prepared a method for Boron Bearing Microalloy Steel as adding boron agent, it is characterized in that carrying out according to the following steps:
(1) press set component and prepare technically pure iron, pig iron containing boron, ferro-titanium, manganese metal, iron-carbon, ferro-silicon and fine aluminium as raw material;
(2) technically pure iron in the raw material of preparation and iron-carbon are joined in induction furnace, under vacuum tightness 1 ~ 10Pa condition by whole material meltings until liquid level is static, then pass into argon gas to vacuum tightness at 3000 ~ 4000Pa, add successively ferro-silicon, fine aluminium, ferro-titanium, manganese metal and pig iron containing boron, under 1580 ~ 1620 ℃ of conditions of temperature, carry out refining, when static to bath surface, complete refining;
(3) refining is cast into ingot casting by melt after finishing under vacuum tightness 3000 ~ 4000Pa and 1580 ~ 1600 ℃ of conditions of temperature, then ingot casting is heated to 1200 ± 10 ℃ and be incubated 0.5 ~ 2h;
(4) ingot casting after insulation is carried out to two stage rolling; First stage start rolling temperature is 1000 ~ 1150 ℃, and finishing temperature is 900 ~ 950 ℃, and draught is 40 ~ 60%; Subordinate phase start rolling temperature is 900 ~ 950 ℃, and finishing temperature is 800 ~ 830 ℃, and draught is 70 ~ 80%; Acquisition rolled sheet material after finish to gauge completes;
(5) rolled sheet material is cooled to 530 ~ 560 ℃ with the speed of 40 ~ 50 ℃/s, then air cooling, to room temperature, is made Boron Bearing Microalloy Steel, and its composition is by weight percentage containing C 0.08 ~ 0.12%, Si 0.3 ~ 0.4%, Mn 1.5 ~ 1.8%, and Ti 0.03 ~ 0.04%, and B 0.0015 ~ 0.0025%, Al 0.03 ~ 0.05%, S≤0.015%, P≤0.020%, surplus is Fe.
2. according to claim 1ly a kind ofly take pig iron containing boron and as adding boron agent, prepare the method for Boron Bearing Microalloy Steel, it is characterized in that the yield strength of described Boron Bearing Microalloy Steel is 700 ~ 750MPa, tensile strength is 780 ~ 800 MPa, and elongation after fracture is 17 ~ 18%.
3. according to claim 1ly a kind ofly take pig iron containing boron and as adding boron agent, prepare the method for Boron Bearing Microalloy Steel, it is characterized in that the room temperature ballistic work of described Boron Bearing Microalloy Steel is 65 ~ 70J, the ballistic work of-40 ℃ is 64 ~ 66J.
4. according to claim 1ly a kind ofly take pig iron containing boron and as adding boron agent, prepare the method for Boron Bearing Microalloy Steel, it is characterized in that the composition of described pig iron containing boron is by weight percentage containing C 3.0 ~ 3.8%, Si 2.0 ~ 3.2%, Mn 0.08 ~ 0.12%, P≤0.06%, S≤0.12%, B 0.20 ~ 1.0%, surplus is Fe.
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| CN104313478A (en) * | 2014-09-23 | 2015-01-28 | 北京工业大学 | Wear-resistant casting steel containing boron-rich slag and preparation method thereof |
| CN107130163A (en) * | 2017-04-27 | 2017-09-05 | 东北大学 | A kind of method that utilization pig iron containing boron improves Q235 steel yield strengths |
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| CN102367543A (en) * | 2011-06-28 | 2012-03-07 | 南阳汉冶特钢有限公司 | Boron steel ASTMA36-B medium and heavy plate and production process thereof |
| CN102766748A (en) * | 2012-08-10 | 2012-11-07 | 江苏省沙钢钢铁研究院有限公司 | Production method of low-temperature steel plate capable of being welded by high heat input |
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| CN102367543A (en) * | 2011-06-28 | 2012-03-07 | 南阳汉冶特钢有限公司 | Boron steel ASTMA36-B medium and heavy plate and production process thereof |
| CN102363859A (en) * | 2011-11-14 | 2012-02-29 | 湖南华菱湘潭钢铁有限公司 | Method for producing wear-resisting steel plate |
| CN102766748A (en) * | 2012-08-10 | 2012-11-07 | 江苏省沙钢钢铁研究院有限公司 | Production method of low-temperature steel plate capable of being welded by high heat input |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104313478A (en) * | 2014-09-23 | 2015-01-28 | 北京工业大学 | Wear-resistant casting steel containing boron-rich slag and preparation method thereof |
| CN104313478B (en) * | 2014-09-23 | 2016-06-01 | 北京工业大学 | A kind of containing Boron Slag wearable cast steel and its preparation method |
| CN107130163A (en) * | 2017-04-27 | 2017-09-05 | 东北大学 | A kind of method that utilization pig iron containing boron improves Q235 steel yield strengths |
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