CN104308054A - Method for forging square-flat steel - Google Patents
Method for forging square-flat steel Download PDFInfo
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- CN104308054A CN104308054A CN201410518691.4A CN201410518691A CN104308054A CN 104308054 A CN104308054 A CN 104308054A CN 201410518691 A CN201410518691 A CN 201410518691A CN 104308054 A CN104308054 A CN 104308054A
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Abstract
The invention relates to a method for forging square-flat steel. Forging is performed on a 1,800-ton radial forging machine, and a raw material is forged in the radial direction for at least 5 times. The method is characterized in that during first forging and second forging, the rolling reduction is 10-20 millimeters. Furthermore, the forging ratio of the raw material to the square-flat steel which is subjected to the last forging is not smaller than 1.5. By adopting the method for forging the square-flat steel, cracks in the edges of the square-flat steel are avoided.
Description
Technical field
The present invention relates to the method for a kind of forging side band steel.
Background technology
Section bar factory 1800 tons of footpath forging production line emphasis kinds of applicant have nonmagnetic steel, Blade Steel, mould steel, stainless pipe, outlet steel etc.Footpath forging machine has unique advantage in forging side's band steel, can realize the forging production of complete right angle, overlength side's band steel.Applicant realizes batch production SCM415 side band steel for 2013, month maximum output reaches 800 tons, this footpath forging production line mainly side's of employing band steel tup side of forging band steel, use raw material is bloom, and the quality problems that square band steel initial stage of development is given prominence to are: square band steel two diagonal angle edge exists the elongated defect of dark about 3-4mm.Detected defect, standard-required is tight, cannot meet standard-required after reconditioning.Initial stage of development footpath forging exporter band steel edge cracks rate average out to 51.8%.
Summary of the invention
In order to overcome the weak point of the method for existing forging side band steel, the invention provides the method for forging side's band steel of a kind of side of avoiding band steel edge cracks.
Design of the present invention adopts the bloom raw material of coupling to forge according to different square band steel specifications, for different material specification, and personalized designs Forging Technology scheme, the generation of the side's of avoiding band steel edge cracks.
Applicant the other side's band steel tup size is measured, and find that tup thickness direction full-size is 370mm, width full-size is 450 sides.The side's of explanation band steel tup maximum open can reach 450 sides, but actual square steel of becoming a useful person is maximum must not be greater than 370 sides, and during as adopted 450 sides' forging, broadening can more than 450 sides.Therefore, under prerequisite of ensuring the quality of products, avoid the employing 450 side side of forging band steel as far as possible.Under the prerequisite of ensuring the quality of products, raw material and trimmed size matched design, be optimized design (1) according to following principle, forging ratio be greater than 1.5.(2), pass rolling specs commonly used by blooming mill.(3), employing is less than 450 side's blooms as far as possible.Raw material and inventory matching design in table 1.
Table 1
For solving edge fold cracks problem, by tracking test, major test 450 side's bloom side of forging band steel.Different forging soft reduction process is adopted to forge, test prevention edge wrinkle and the folding measure produced, this program key principle is adjusted by reduction in pass in Forging Technology, first reduction in pass is carried out reducing decomposition, 10-20mm is adjusted to by original single pass 40-50mm, the forging of point 2-3 passage, namely front two passages are forged drafts every time are adjusted to 10-20mm, and all the other forging programs are also corresponding to be optimized.
The method of forging side of the present invention band steel is in the forging of 1800 tons of footpath forging machines, comprises the minimum five passage radial forgings of raw material, it is characterized in that: when the first passage forging is forged with the second passage, drafts is 10-20mm.
Further, in the method for above-mentioned forging side's band steel, raw material and last passage forge after the forging ratio of square band steel be not less than 1.5.
The method of above-mentioned forging side's band steel, is characterized in that: raw material is square billet, and thickness and the width of raw material are all not more than 450mm.The thickness of raw material and width be following any one:
350mm；400mm；430mm；450mm。
The method of above-mentioned forging side's band steel, segments further, it is characterized in that the thickness of raw material and the specification (thickness and width) of width and finished product for following any one:
The thickness of raw material is 350mm-400 mm, and width is 350mm-400 mm, and the thickness of corresponding finished product is 210 mm-230 mm, and width is 230 mm-270 mm; Forging ratio 1.97-3.3;
The thickness of raw material is 400mm-450 mm, and width is 400mm-450 mm, and the thickness of corresponding finished product is 260 mm-280 mm, and width is 260 mm-300 mm; Forging ratio 1.9-2.9;
The thickness of raw material is 400mm-450 mm, and width is 400mm-450 mm, and the thickness of corresponding finished product is 198 mm, and width is 373 mm; Forging ratio 2.2-2.74;
The thickness of raw material is 430mm-450 mm, and width is 430mm-450 mm, and the thickness of corresponding finished product is 260 mm-290 mm, and width is 310 mm-380 mm; Forging ratio 1.67-2.5;
The thickness of raw material is 440mm-450 mm, and width is 440mm-450 mm, and the thickness of corresponding finished product is 160 mm-180 mm, and width is 390 mm-410 mm; Forging ratio 2.6-3.2.
The method of above-mentioned forging side's band steel, is characterized in that: when last passage is forged, whole profile, forging ratio 1.00.When last passage forges whole profile, drafts is zero, better effects if.
The method of above-mentioned forging side's band steel, is characterized in that: when the 3rd passage forging, drafts is 10-20mm.Better effects if.
Beneficial effect of the present invention
The side's of the invention solves band steel tup forging large gauge bloom edge folds the problem of generation.Formulate not Tongfang band steel specification and forge the design of preferably raw material, because of the generation of the edge fold cracks that raw material width and square band steel tup difference size difference cause, when square band steel tup forging square billet, first passage, the second passage adopt 10mm-20mm progressive mode, avoid because large pressure causes edge to spread the problem of super large, thus the generation of the good side's of preventing band steel edge cracks.Side's band steel occupation rate of market obtains large raising.Successively the square flat product such as 20CrMoA, 30CrMoA, 1Cr13 has successfully been developed since 2013.Exporter's band steel surface quality significantly reduces degradation and changes the original sentence to ratio, and edge flaw detection qualification rate brings up to 98.5% by 48.2%, produces the square band steel of 12 × 800 tons per year, directly creates effect 311.26 ten thousand yuan.
Detailed description of the invention
Describe the specific embodiment of the present invention in detail below in conjunction with embodiment, but the specific embodiment of the present invention is not limited to following embodiment.
embodiment one
The present embodiment is 450 × 450mm
2side's bloom is forged into 303 × 399 mm
2side's band steel.Total forging ratio is 1.67.Total forging ratio be every time than product.Steel grade is 20CrMoA, the steps include:
ifirst passage forging, 450 × 450mm
2side's bloom is forged into 433 × 392.6 mm
2side's band steel, forging ratio 1.19, drafts 17mm, cross section reduces 16%.
iIsecond passage forging, 433 × 392.6 mm
2side's band steel bloom is forged into 416 × 335.2mm
2side's band steel, forging ratio 1.22, drafts 17mm, cross section reduces 18%.
iII3rd passage forging, 416 × 335.2mm
2side's band steel bloom is forged into 401 × 304.0mm
2side's band steel, forging ratio 1.14, drafts 15mm, cross section reduces 12.6%.
iVfour-pass forges, 401 × 304.0mm
2side's band steel bloom is forged into 400 × 303.0mm
2side's band steel, forging ratio 1.01, drafts 1mm, cross section reduces 0.6%.
vthe
fivepassage is forged, and whole profile, 400 × 303.0mm
2side's band steel bloom is forged into 399 × 303.0mm
2side's band steel, forging ratio 1.00, drafts 1mm, cross section reduces 0.2%.(according to corner angle situation, manually arrange width 1mm drafts, main purpose is whole corner angle)
embodiment two
The present embodiment is 400 × 400mm
2side's bloom is forged into 252 × 244 mm
2side's band steel.Total forging ratio is 2.6.Total forging ratio be every time than product.Steel grade is 30CrMoA, the steps include:
ifirst passage forging, 400 × 400mm
2side's bloom is forged into 385 × 360 mm
2side's band steel, forging ratio 1.15, drafts 15mm, cross section reduces 13.4%.
iIsecond passage forging, 385 × 360 mm
2side's band steel bloom is forged into 370 × 340mm
2side's band steel, forging ratio 1.10, drafts 15mm, cross section reduces 9.2%.
iII3rd passage forging, 370 × 340mm
2side's band steel bloom is forged into 335 × 305mm
2side's band steel, forging ratio 1.23, drafts 35mm, cross section reduces 18.8%.
iVfour-pass forges, 335 × 305mm
2side's band steel bloom is forged into 300 × 275mm
2side's band steel, forging ratio 1.24, drafts 35mm, cross section reduces 19.3%.
v5th passage forging, 300 × 275mm
2side's band steel bloom is forged into 275 × 246mm
2side's band steel, forging ratio 1.22, drafts 25mm, cross section reduces 18%.
vII6th passage forging, 275 × 246mm
2side's band steel bloom is forged into 260 × 244mm
2side's band steel, forging ratio 1.07, drafts 15mm, cross section reduces 6.2%.
vIII7th passage forging, 260 × 244mm
2side's band steel bloom is forged into 252 × 244mm
2side's band steel, forging ratio 1.03, drafts 8mm, cross section reduces 3.1%.
Ⅸ8th passage forging, whole profile, without drafts, forging ratio 1.00, drafts 0mm, cross section reduces 0%.
The square band steel two side opposite the angle flawless defect that above-mentioned two embodiments are forged into.Detect a flaw qualified, meet standard-required.
Above-mentioned two embodiments are all implemented on 1800 tons of footpath forging machines, are automatically controlled by the V4 of BarForge Software Create.Example one is 450 × 450mm
2side bloom thickness and width, be forged into 433 × 392.6 mm
2side's thickness of band steel and width parameter etc. input the V4 of BarForge Software Create, and the equipment of starting can give birth to other numerical value.For embodiment one and embodiment two, respectively in table 2 and table 3.
Table 2
Table 3
。
In two V4 of above-mentioned BarForge Software Create, English as follows with contrasting of Chinese;
Paas-passage, Dim1-size 1, Dim2-size 2, Red-forging ratio,
Red%-forging deformation rate, V-in-inlet velocity, Vout-muzzle velocity, Temp-temperature,
Frce-pressure, Powr-power, the clamping length of B-ChckL-A-B manipulator, A manipulator
Str-forging frequency (secondary divide), the anglec of rotation (in square steel forging process, non rotating, therefore shows nothing in program) Sec-forging time (second) that Rot-refer to expects.
Claims (10)
1. a method for forging side's band steel, it is in the forging of 1800 tons of footpath forging machines, comprises the minimum five passage radial forgings of raw material, it is characterized in that: when the first passage forging is forged with the second passage, drafts is 10-20mm.
2. the method for forging side according to claim 1 band steel, is characterized in that: raw material and last passage forge after the forging ratio of square band steel be not less than 1.5.
3. the method for forging side according to claim 1 and 2 band steel, is characterized in that: raw material is square billet, thickness and the width of raw material are all not more than 450mm.
4. the method for forging side according to claim 3 band steel, it is characterized in that the thickness of raw material and width be following any one:
350mm；400mm；430mm；450mm。
5. the method for forging side according to claim 3 band steel, it is characterized in that the thickness of raw material and the specification of width and finished product be following any one:
The thickness of raw material is 350mm-400 mm, and width is 350mm-400 mm, and the thickness of corresponding finished product is 210 mm-230 mm, and width is 230 mm-270 mm; Forging ratio 1.97-3.3;
The thickness of raw material is 400mm-450 mm, and width is 400mm-450 mm, and the thickness of corresponding finished product is 260 mm-280 mm, and width is 260 mm-300 mm; Forging ratio 1.9-2.9;
The thickness of raw material is 400mm-450 mm, and width is 400mm-450 mm, and the thickness of corresponding finished product is 198 mm, and width is 373 mm; Forging ratio 2.2-2.74;
The thickness of raw material is 430mm-450 mm, and width is 430mm-450 mm, and the thickness of corresponding finished product is 260 mm-290 mm, and width is 310 mm-380 mm; Forging ratio 1.67-2.5;
The thickness of raw material is 440mm-450 mm, and width is 440mm-450 mm, and the thickness of corresponding finished product is 160 mm-180 mm, and width is 390 mm-410 mm; Forging ratio 2.6-3.2.
6. the method for forging side according to claim 1 and 2 band steel, is characterized in that: when last passage is forged, whole profile, and forging ratio is 1.00.
7. the method for forging side according to claim 6 band steel, is characterized in that: when last passage forges whole profile, drafts is zero.
8. the method for forging side according to claim 3 band steel, is characterized in that: when last passage is forged, whole profile, and forging ratio is 1.00.
9. the method for forging side according to claim 5 band steel, is characterized in that: when last passage is forged, whole profile, and forging ratio is 1.00.
10. the method for forging side according to claim 1 and 2 band steel, is characterized in that: when the 3rd passage forging, drafts is 10-20mm; Raw material is square billet, and thickness and the width of raw material are all not more than 450mm; When last passage is forged, whole profile, forging ratio is 1.00.
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| CN201410518691.4A CN104308054A (en) | 2014-10-05 | 2014-10-05 | Method for forging square-flat steel |
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| CN201410518691.4A CN104308054A (en) | 2014-10-05 | 2014-10-05 | Method for forging square-flat steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785688A (en) * | 2015-04-10 | 2015-07-22 | 江苏苏南重工机械科技有限公司 | Forging method of hot-delivery flat and square ingots |
| CN105033131A (en) * | 2015-06-26 | 2015-11-11 | 中钢集团邢台机械轧辊有限公司 | Die steel corner forging process |
| CN108555202A (en) * | 2018-04-10 | 2018-09-21 | 抚顺特殊钢股份有限公司 | A kind of manufacturing method of the embedded pin flat bar of diameter forging machine production core grade driving mechanism |
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| JP2001105078A (en) * | 1999-10-14 | 2001-04-17 | Hitachi Metals Ltd | Forging method of tool steel |
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| CN102513483A (en) * | 2011-12-07 | 2012-06-27 | 芜湖新兴铸管有限责任公司 | Forging and striking production process for blank with rectangular section |
| CN102225449B (en) * | 2011-03-23 | 2013-03-20 | 山西太钢不锈钢股份有限公司 | Method for forging manganese-containing stainless steel ingot |
| CN102294425B (en) * | 2011-08-22 | 2013-12-25 | 中原特钢股份有限公司 | Forging device and forging method for upper wide anvil and lower narrow anvil |
| CN102581187B (en) * | 2012-02-21 | 2014-01-22 | 山西太钢不锈钢股份有限公司 | Method for forging flat steel by using universal hammerhead |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001105078A (en) * | 1999-10-14 | 2001-04-17 | Hitachi Metals Ltd | Forging method of tool steel |
| JP2007136487A (en) * | 2005-11-16 | 2007-06-07 | Sumitomo Metal Ind Ltd | Method of hot forging |
| CN102225449B (en) * | 2011-03-23 | 2013-03-20 | 山西太钢不锈钢股份有限公司 | Method for forging manganese-containing stainless steel ingot |
| CN102294425B (en) * | 2011-08-22 | 2013-12-25 | 中原特钢股份有限公司 | Forging device and forging method for upper wide anvil and lower narrow anvil |
| CN102513483A (en) * | 2011-12-07 | 2012-06-27 | 芜湖新兴铸管有限责任公司 | Forging and striking production process for blank with rectangular section |
| CN102581187B (en) * | 2012-02-21 | 2014-01-22 | 山西太钢不锈钢股份有限公司 | Method for forging flat steel by using universal hammerhead |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785688A (en) * | 2015-04-10 | 2015-07-22 | 江苏苏南重工机械科技有限公司 | Forging method of hot-delivery flat and square ingots |
| CN105033131A (en) * | 2015-06-26 | 2015-11-11 | 中钢集团邢台机械轧辊有限公司 | Die steel corner forging process |
| CN105033131B (en) * | 2015-06-26 | 2017-05-03 | 中钢集团邢台机械轧辊有限公司 | Die steel corner forging process |
| CN108555202A (en) * | 2018-04-10 | 2018-09-21 | 抚顺特殊钢股份有限公司 | A kind of manufacturing method of the embedded pin flat bar of diameter forging machine production core grade driving mechanism |
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