CN105088053A - Novel process for smelting HRB400E steel material - Google Patents

Novel process for smelting HRB400E steel material Download PDF

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Publication number
CN105088053A
CN105088053A CN201410215019.8A CN201410215019A CN105088053A CN 105088053 A CN105088053 A CN 105088053A CN 201410215019 A CN201410215019 A CN 201410215019A CN 105088053 A CN105088053 A CN 105088053A
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China
Prior art keywords
steel
smelting
hrb400e
novel
sample
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CN201410215019.8A
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Chinese (zh)
Inventor
杨辉
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XINXING DUCTILE IRON PIPES XINJIANG CO Ltd
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XINXING DUCTILE IRON PIPES XINJIANG CO Ltd
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Priority to CN201410215019.8A priority Critical patent/CN105088053A/en
Publication of CN105088053A publication Critical patent/CN105088053A/en
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Abstract

The invention discloses a novel process for smelting an HRB400E steel material. The novel process includes a method for smelting the HRB400E steel material through an existing vanadium nitrogen smelting process. In the existing method for smelting the HRB400E steel material, ferrochrome is used for replacing part of vanadium nitrogen alloy used in the vanadium nitrogen smelting process. Based on the calculation of mechanical properties, 0.060%-0.070% of Cr is added into the steel, V is reduced by 0.010% correspondingly, and the proportions of other components are not adjusted. By means of the novel process for smelting the HRB400E steel material, the properties of the steel material can meet the requirements of the market and customers, and the steel smelting cost is reduced.

Description

Smelt the novel process of HRB400E steel
Technical field
The invention belongs to the smelting process of HRB400E steel, particularly smelt the novel process of HRB400E steel.
Background technology
The present situation of HRB400E steel smelting technology: the technique of smelting HRB400E steel, the steel mill of more than 95% all uses 76% vanadium nitrogen Conventional alloys technique, and vanadium nitrogen smelting technology is complicated, resource is few, expensive.Therefore, [Cr] smelting the research of novel process in HRB400E, explore and be just provided with epoch-making meaning.
Summary of the invention
The object of the present invention is to provide a kind of novel process of smelting HRB400E steel, steel performance can be met and meet market and client's needs, can steel-making cost be reduced again.
The object of the present invention is achieved like this: a kind of novel process of smelting HRB400E steel, comprises the method that existing employing known vanadium nitrogen smelting technology smelts HRB400E steel; In the middle of the method for existing smelting HRB400E, the part VN alloy applied in vanadium nitrogen smelting technology is replaced with ferrochrome, calculate according to mechanical property, in steel, add the Cr of 0.060%-0.070% and the V of corresponding minimizing 0.010%, all the other component proportionss do not adjust.
(1) calculate according to mechanical property, in steel, adding [Cr] ≈ 0.065%, substantially identical with the steel performance reducing [V]=0.010% in steel (HRB400E composition 0.060%≤[Cr]≤0.070% is tested in working control, and middle limit controls as [Cr] ≈ 0.065%; HRB400E[V] control to reduce by 0.010% on given basis; All the other compositions do not adjust).
(2) by composition, price carry out calculating (being as the criterion with tap 100t/ stove) above; [Cr]=0.065%, needs ferrochrome=65/0.5627/0.9 ≈ 128.35kg/ stove, cost ≈ 9.7 yuan/t; [V]=0.010%, needs VN alloy=10/0.76/0.95 ≈ 13.85kg/ stove, cost ≈ 16.6 yuan/t, then cost savings=16.6 yuan/t-9.7 unit/t=6.9 unit/t.
The present invention can meet steel performance and meet market and client's needs, can reduce steel-making cost again.
Accompanying drawing explanation
Fig. 1 existing steelmaking equipment process flow sheet of the present invention (" △ " is quality monitoring point);
Fig. 2 the present invention takes from first sample grain fineness number grading crystalline phase figure that heat (batch) number is the HRB400E steel of A21264;
Fig. 3 the present invention takes from second sample grain fineness number grading crystalline phase figure that heat (batch) number is the HRB400E steel of A21264;
Fig. 4 the present invention takes from first sample grain fineness number grading crystalline phase figure that heat (batch) number is the HRB400E steel of A21265;
Fig. 5 the present invention takes from second sample grain fineness number grading crystalline phase figure that heat (batch) number is the HRB400E steel of A21265.
Embodiment
Smelt a novel process for HRB400E steel, comprise the method that existing employing known vanadium nitrogen smelting technology smelts HRB400E steel; In the middle of the method for existing smelting HRB400E, the part VN alloy applied in vanadium nitrogen smelting technology is replaced with ferrochrome, calculate according to mechanical property, in steel, add the Cr of 0.060%-0.070% and the V of corresponding minimizing 0.010%, all the other component proportionss do not adjust.
Embodiment of the present invention:
(1) overall experimental program
1, replace part VN alloy with ferrochrome, Theoretical Calculation can reduce ton steel cost 2.9 yuan/t;
2, under current actual production technique, Theoretical Calculation is carried out.
Ferrochrome is with reference to shown in composition and price table one described as follows:
Table one
VN alloy is with reference to shown in composition and price table two described as follows:
Table two
(2) specific experiment scheme
1, shown in the converter process (continuous casting process does not adjust) of HRB400E steel table three and table four described as follows:
Table three
Table four
2, shown in the performance of HRB400E steel table five described as follows and table six:
Table five
Table six
Calculate and HRB400E Composition Control according to mechanical performance index analysis, steel mechanics performance; In conjunction with ferrochrome, vanadium nitrogen at deoxidation alloying, wherein [Cr] atom function of organization of crystal grain in steel has identical, similar function of organization with [V], [N] the atom function of organization of crystal grain in steel; In conjunction with current steel-making converter production technique, therefore propose to replace the novel process of part VN alloy wherein to explore, to reach the object reduced costs with ferrochrome in the technique of existing smelting HRB400E steel.
According to market and smelting steel grade needs, under the prerequisite ensureing steel performance, use novel process, novel material carry out reasonably combined, reach steel performance and meet market and client's needs, can reduce steel-making cost again.According to actual production processing condition, find out corresponding HRB400E by practice and use ferrochrome smelting HRB400E novel process, from the alloy collocation operation scheme of novel process, alloy price difference and the best, reach the target that can reduce again cost of making steel alloy while meeting steel performance needs.
Basis: 1, replace part VN alloy with ferrochrome, Theoretical Calculation can reduce ton steel cost 6.9 yuan/t; 2, empirical theory measuring and calculating: (1) according to ferrochrome, vanadium nitrogen after deoxidation alloying, wherein [Cr] atom function of organization of crystal grain in steel has identical, similar function of organization with [V], [N] the atom function of organization of crystal grain in steel, therefore can carry out the experiment of ferrochrome replacement part VN alloy; (2) under current actual production technique, Theoretical Calculation is carried out.
Ferrochrome is with reference to shown in composition and price table seven described as follows:
Table seven
Detailed Cr C Si S Price (budget unit/t)
Ferrochrome (%) (chemical examination) 56.27 8.56 1.5 0.025 7542.45
VN alloy is with reference to shown in composition and price table eight described as follows:
Table eight
Detailed V N Price (budget unit/t)
Vanadium nitrogen (%) (chemical examination) 76 14 119658.12
Fig. 1 is existing steelmaking equipment process flow sheet of the present invention.
As shown in Figures 2 and 3, organize Grain size analysis: this Lot sample hoc scenario carries out assessment analysis according to GB13299-1991, according to GB6394-2002 metal mean grain size ranking method (resection), the sample grain fineness number of first is as shown in Figure 2 rated 6 grades, second sample grain fineness number is as shown in Figure 3 rated 5.5 grades, within specified requirement.This batch sample organizes the perlite in organizing on the whole and ferrite to distribute comparatively even.Therefore can show that this sample is qualified by above analysis.This Lot sample hoc scenario carries out assessment analysis according to GB13299-1991, and this batch sample tissue exists slight Wei Shi body tissue, can be assessed as 1 grade, can cause slight impact to performance.The reason formed may be that Heating temperature is too high, and soaking time is long, and speed of cooling is too fast.All there is a certain amount of block perlite in two samples, (Crack cause is because speed of cooling is slower).Perlite on the whole in tissue and ferrite distribute comparatively even.Therefore can show that this sample is qualified by above analysis.According to GB6394-2002 metal mean grain size ranking method (resection), this batch first sample grain fineness number is rated 6 grades, second sample grain fineness number is rated 5.5 grades, within specified requirement.
As shown in Figure 4 and Figure 5, this hoc scenario carries out assessment analysis according to GB13299-1991, the first Zhi Yang Wei Shi body tissue ranking is as shown in Figure 42 grades, the second Zhi Yang Wei Shi body tissue ranking is as shown in Figure 51 grade, Wei Shi body tissue is within the scope of specified requirement, less to finished steel performance impact.According to GB6394-2002 metal mean grain size ranking method (resection), this sample first sample grain fineness number is rated 5.5 grades, second sample grain fineness number is rated 6 grades, within specified requirement.Observe whole detection sectional plane, grain size is much the same.Edge and center grain size do not have notable difference.Therefore can show that this sample is qualified by above analysis.This hoc scenario carries out assessment analysis according to GB13299-1991, this batch sample first Zhi Yang Wei Shi body tissue ranking is 2 grades, second Zhi Yang Wei Shi body tissue ranking is 1 grade, and the reason producing Wei Shi body tissue may be that Heating temperature is too high, and soaking time is long.Speed of cooling is too fast.Make a general survey of whole cross section, the ferrite and pearlite except Wei Shi body tissue is evenly distributed.Wei Shi body tissue is within the scope of specified requirement, less to finished steel performance impact.According to GB6394-2002 metal mean grain size ranking method (resection), this sample first sample grain fineness number is rated 5.5 grades, second sample grain fineness number is rated 6 grades, within specified requirement.And observe whole detection sectional plane, grain size is much the same.Edge and center grain size do not have notable difference.

Claims (1)

1. smelt a novel process for HRB400E steel, comprise the method that existing employing known vanadium nitrogen smelting technology smelts HRB400E steel; It is characterized in that: in the middle of the method for existing smelting HRB400E, the part VN alloy applied in vanadium nitrogen smelting technology is replaced with ferrochrome, calculate according to mechanical property, in steel, add the Cr of 0.060%-0.070% and the V of corresponding minimizing 0.010%, all the other component proportionss do not adjust.
CN201410215019.8A 2014-05-20 2014-05-20 Novel process for smelting HRB400E steel material Pending CN105088053A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201410215019.8A CN105088053A (en) 2014-05-20 2014-05-20 Novel process for smelting HRB400E steel material

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1730705A (en) * 2005-08-08 2006-02-08 宣化钢铁集团有限责任公司 Microalloyed reinforcing steel bar containing chromium and niobium, and its production process
CN101696484A (en) * 2009-10-27 2010-04-21 广州钢铁企业集团有限公司 Chromium-containing HRB400 hot-rolled ribbed steel bar and production method thereof
CN102345052A (en) * 2011-11-01 2012-02-08 莱芜钢铁集团有限公司 Production method of HRB400 (Hazardous Review Board 400) reinforcing steel bar
CN102383042A (en) * 2011-11-10 2012-03-21 长沙东鑫环保材料有限责任公司 Microalloy HRB400E steel bar containing chrome and nitrogen and production method thereof
CN103667922A (en) * 2013-11-18 2014-03-26 首钢水城钢铁(集团)有限责任公司 Method of producing high-strength HRB400 hot-rolled ribbed bars

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1730705A (en) * 2005-08-08 2006-02-08 宣化钢铁集团有限责任公司 Microalloyed reinforcing steel bar containing chromium and niobium, and its production process
CN101696484A (en) * 2009-10-27 2010-04-21 广州钢铁企业集团有限公司 Chromium-containing HRB400 hot-rolled ribbed steel bar and production method thereof
CN102345052A (en) * 2011-11-01 2012-02-08 莱芜钢铁集团有限公司 Production method of HRB400 (Hazardous Review Board 400) reinforcing steel bar
CN102383042A (en) * 2011-11-10 2012-03-21 长沙东鑫环保材料有限责任公司 Microalloy HRB400E steel bar containing chrome and nitrogen and production method thereof
CN103667922A (en) * 2013-11-18 2014-03-26 首钢水城钢铁(集团)有限责任公司 Method of producing high-strength HRB400 hot-rolled ribbed bars

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