CN1136485A - Composite shearing blade for shearing hot steel billet and its producing method - Google Patents
Composite shearing blade for shearing hot steel billet and its producing method Download PDFInfo
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- CN1136485A CN1136485A CN 95112815 CN95112815A CN1136485A CN 1136485 A CN1136485 A CN 1136485A CN 95112815 CN95112815 CN 95112815 CN 95112815 A CN95112815 A CN 95112815A CN 1136485 A CN1136485 A CN 1136485A
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Abstract
The composite shearing blade is used to shear the continuously casted billet and rolled billet etc. hot steel billet. It welds the austenic base steel on the matrix of carbon steel or alloy steel or the matrix of the old shearing blade to form an intermediate transition layer, on which the working layer is formed by bead welding the Co-Cr-W or Co-Cr alloy, then the hot shearing blade possessing of the composite structure of intermediate transition layer and bead-welded working layer is obtained. The service life of said composite shearing blade is five times of that of the original integral shearing blade.
Description
The present invention relates to cutter and manufacture method thereof that a kind of shear heat steel billet is used, refer in particular to steel billet hot shears cutting edge and manufacture method thereof with multi-layer compound structure cutting edge.
In steel billet hot shears when work,, the temperature of shearing steel billet is higher than 650 ℃, sometimes even reach 1100 ℃～1250 ℃.Hot-shear blade cutting edge temperature reaches as high as more than 700 ℃, also cooling quickly in air or under the water-cooled condition of cutting edge.Therefore, require hot-shear blade cutting edge material to have higher high temperature wear resistant, high temperature resistance to impact and cold-resistant thermal fatigue property.The hot-shear blade of generally using is whole steel alloy cutting edge at present, and the material of cutting edge has 5CrW2Si, 6CrW2Si, 5CrNiMo, 5CrMnMo, 3Cr2W8V, H13 etc.The major defect of whole steel alloy cutting edge is that the heat resistance of cutting edge cutting edge often can not satisfy instructions for use, the high temperature wear resistant poor-performing, and service life is low, and manufacturing cost is also higher.
The patent of invention of " repair method of billet caster hot-shear blade ", ZL91110471.2, the applying date is on October 29th, 91, a kind of method of old cutting edge being carried out Welding Repair has been proposed, its method is with the cobalt-base alloys welding rod cutting edge that directly repair welding is worn and torn on the cutting edge matrix, form the built-up welding working lining on the cutting edge cutting edge, but the cutting edge of repairing in this way, its basic material only limits to solderability such as 5CrW2Si steel grade preferably; To the welding process requirement strictness; The overlay cladding postwelding easily cracks, and the dilution rate of overlay cladding alloying element is big, fails to give full play to the effect of the valuable alloying element of overlay cladding, and cutting edge in use is prone to the cutting edge chipping, even part overlay cladding peeling phenomenon.If with on the old cutting edge matrix heat fatigue cracking that can not remove deeply being arranged, then should not repair, fracture otherwise be prone to matrix in the cutting edge use, the overlay cladding peeling phenomenon, thus the number of times repaired of old cutting edge is less.
Based on above-mentioned cognition, the purpose of this invention is to provide the good steel billet hot shears cutting edge of a kind of high temperature wear resistant, strong, the cold-resistant thermal fatigue property of shock resistance and the machining manufacture of this cutting edge.
Composite shearing blade for shearing hot steel billet provided by the present invention is made up of cutting edge matrix and cutting edge.Wherein, cutting edge is the composite construction that contains intermediate layer and built-up welding working lining, and intermediate layer directly covers on the whole substrate, and the built-up welding working lining covers intermediate layer fully, and constitutes cutting edge sword face.
For the machining manufacture of realizing composite shearing blade for shearing hot steel billet provided by the present invention is:
(1) at first use 35,45,40Cr, 5CrW2Si, 5CrNiMo, 5CrMnMo, 3Cr2W8V, carbon steel such as H13 or alloy steel material are made the cutting edge matrix, process a weld groove at the cutting edge position of matrix, the cross sectional shape of weld groove can be rectangle, stairstepping, triangle or fan-shaped.The sharp corner of weld groove is answered rounding off, and the cross section two right-angle side length of sides are 1～55mm.Then matrix is carried out modified heat treatment.
Perhaps, the old cutting edge of also available usefulness is made matrix, method with grinding or gas cutting, gouge+grinding processes a weld groove as mentioned above, heat fatigue cracking on the matrix of cutting edge position should be cleaned out during the processing weld groove, can carry out repair welding with the carbon manganese steel welding rod for the crackle that is difficult to remove, if the crackle situation is serious or weld groove is opened too muchly, also available carbon manganese steel welding rod welds one or more layers prime coat on the weld groove position of matrix.The carbon manganese steel welding rod weld seam chemical analysis that welds old cutting edge matrix cracking is (weight %) :≤0.15C ,≤2.0Mn ,≤1.0Si.
(2) secondly, welding one deck intermediate layer on cutting edge matrix weld groove position, intermediate layer must cover the weld groove position fully, and thickness is even, and the thickness of intermediate layer is 0.5mm～10mm, and weld metal belongs to the austenitic matrix steel.
(3) last, with welding substrate preheating to 250 ℃～650 ℃ (preheat temperature is decided on basic material and size) of intermediate layer, with the working lining of oxy-acetylene flame gas welding, argon arc weld deposit, manual electric arc pile up welding, oxy-acetylene flame surfacing or plasma spray welding method built-up welding cutting edge.Weld metal belongs to Co-Cr-W or Co-Cr base alloy.Overlay cladding notes staying the allowance of 1～2mm, and postwelding is put into preheating furnace or insulation material slow cooling with cutting edge, perhaps also can go into to be heated in the stove about 650 ℃ insulation and cool off with stove after 1-2 hour.
The welding transition layer is (weight %) :≤0.6C with the weld seam chemical analysis of welding rod, 0.40～5.0Mn, and≤1.0Si, 15.0～25.0Cr, 5.0～20.0Ni ,≤3.0W ,≤3.0Mo ,≤1.0V ,≤0.5Nb, weld metal belong to the austenitic matrix steel.
The chemical analysis of built-up welding working lining weld seam is (weight %): 0.20～1.80C, 18.0～32.0Cr, 0.0～10.0W ,≤5Fe ,≤3Si ,≤2Mn ,≤3Ni, Co base.Weld metal belongs to Co-Cr-W or Co-Cr base alloy.
The compound cutting edge that shear heat steel billet of the present invention is used can be sheared hot steel billets such as continuous casting billet, rolled blank, the service life that can further improve hot-shear blade, and steady quality.The inventive method is used for the reparation of old cutting edge, cutting edge is used repeatedly, reduce production costs.
Accompanying drawing 1 is the schematic diagram of cutting edge of the present invention.
Accompanying drawing 2 is schematic cross-sections of cutting edge of the present invention.
Accompanying drawing 3 is one of weld groove schematic cross-sections of cutting edge of the present invention.
Accompanying drawing 4 be cutting edge of the present invention the weld groove schematic cross-section two.
Accompanying drawing 5 be cutting edge of the present invention the weld groove schematic cross-section three.
Accompanying drawing 6 be cutting edge of the present invention the weld groove schematic cross-section four.
Embodiment one:
At 250 tons, shear on the hot shears of the rolling billet of 123mm * 123mm, the whole cutting edge of former use 5CrW2Si steel, a slice cutting edge can use 2～4 cutting edges, because the matrix after using subsides, distortion is serious, so generally only use 2 cutting edges.
Make the matrix 1 of cutting edge with 45 steel, leave cross sectional shape as shown in Figure 3 on a cutting edge, sectional dimension is the weld groove 3 of 30mm (wide) * 40mm (height).Then carry out modified heat treatment.Then by hand the method for arc welding on cutting edge matrix weld groove position, weld one deck thickness evenly, thickness is the intermediate layer 21 about 6mm, the chemical analysis of intermediate layer 21 weld seams is (weight %): 0.58C, 4.23Mn, 0.60Si, 20.3Cr, 11.0Ni, 2.83W, 2.74Mo, 0.8V, 0.1Nb.At last, will weld substrate preheating to 380～400 ℃ of intermediate layer 21, with argon arc weld deposit method built-up welding cutting edge working lining 22, postwelding is put into the preheating furnace furnace cooling to room temperature with cutting edge.Working lining 22 weld seam chemical analysis are (weight %): 1.6C, 0.58Mn, 1.0Si, 30.0Cr, 8.8W, 0.5Fe, Co surplus.So can obtain the compound cutting edge that cutting edge 2 contains intermediate layer 21 and working lining 22.
Cutting edge matrix 1 as above-mentioned 45 steel are made also can adopt with old cutting edge and make.If then leave as above-mentioned weld groove 3 with carbon arc air gouging earlier, and grind off oxidation, the carburetting layer at position to be welded with hand-held emery wheel, expose metallic luster,, then use the soldering of carbon manganese steel welding rod if on the weld groove 3 crackle is arranged, carbon manganese steel welding rod weld seam chemical analysis is (weight %): 0.12C, 1.6Mn, 0.60Si.Then use with above-mentioned technology welding intermediate layer 21 and cutting edge working lining 22.
By using contrast, one pair of usefulness 45 carbon steel is the compound cutting edge of matrix, can be used as the whole cutting edge of former 5～10 pairs of 5CrW2Si steel and use.
Two of enforcement:
The whole cutting edge of the 3CrW8V steel of shearing 180mm * 180mm continuous casting billet each cutting edge in normal working conditions can only use two weeks, cut off the steel billet number of times about 3000～4000 times, two cutting edges of a general use of cutting edge can use one month, cut off the steel billet number of times about 6000～8000 times.
With 6CrW2Si is matrix 1, or makes matrix 1 with old cutting edge, produces the compound cutting edge that cutting edge contains intermediate layer 21 and built-up welding working lining 22 by basic method with embodiment 1.This compound cutting edge (using a cutting edge) can use 3～4 months, and inferior surplus cut-out steel billet number of times reaches 28000, be more than 7 times of former whole cutting edge its service life.
Claims (5)
1, the compound cutting edge used of a kind of shear heat steel billet is made up of matrix and cutting edge, it is characterized in that: cutting edge is made of the intermediate layer of austenitic steel welding and the working lining of Co-Cr-W or Co-Cr base alloy welding deposit.
2, a kind of method of making the compound cutting edge that shear heat steel billet as claimed in claim 1 uses the steps include:
(1). at first use 35,45,40Cr, 5CrW2Si, 5CrNiMo, 5CrMnMo, 3Cr2W8V, carbon steel such as H13 or alloy steel material are made the cutting edge matrix, process a weld groove at the cutting edge position of matrix, the cross sectional shape of weld groove can be rectangle, stairstepping, triangle or fan-shaped, and the sharp corner of weld groove is answered rounding off, and the cross section two right-angle side length of sides are 1～55mm; Then matrix is carried out modified heat treatment;
(2). secondly, welding one deck intermediate layer on cutting edge matrix weld groove position, intermediate layer must cover the weld groove position fully, and thickness is even, and the thickness of intermediate layer is 0.5mm～10mm;
(3). last, substrate preheating to 250 ℃～650 ℃ (preheat temperature is decided on basic material and size) of intermediate layer will be welded, working lining with oxy-acetylene flame gas welding, argon arc weld deposit, manual electric arc pile up welding, oxy-acetylene flame surfacing or plasma spray welding method built-up welding cutting edge, overlay cladding notes staying the allowance of 1～2mm, postwelding is put into preheating furnace or insulation material slow cooling with cutting edge, can go into also perhaps to be heated in the stove about 650 ℃ that insulation 1-2 is little that the back is cooled off with stove.
3, the method of the compound cutting edge that manufacturing shear heat steel billet according to claim 4 is used, it is characterized in that: the cutting edge matrix also can be with making of old cutting edge, with grinding or gas cutting, the method of gouge+grinding processes a weld groove, heat fatigue cracking on the matrix of blade position should be cleaned out during the processing weld groove, can carry out repair welding with the carbon manganese steel welding rod for the crackle that is difficult to remove, if the crackle situation is serious or weld groove is opened too much, also available carbon manganese steel welding rod welds one or more layers prime coat on the weld groove position of matrix, the carbon manganese steel welding rod weld seam chemical analysis that welds old cutting edge matrix cracking is (weight %) :≤0.15C, ≤ 2.0Mn ,≤1.0Si.
4, the compound cutting edge used of shear heat steel billet according to claim 1 and 2, it is characterized in that: the welding intermediate layer is (weight %) :≤0.6C with the weld seam chemical analysis of welding rod, 0.40～5.0Mn ,≤1.0Si, 15.0～25.0Cr, 5.0～20.0Ni, ≤ 3.0W ,≤3.0Mo ,≤1.0V, ≤ 0.5Nb, weld metal belong to the austenitic matrix steel.
5, the compound cutting edge used of shear heat steel billet according to claim 1 and 2, it is characterized in that: the chemical analysis of welding job layer weld seam is (weight %): 0.20～1.80C, 18.0～32.0Cr, 0.0～10.0W ,≤5Fe ,≤3Si, ≤ 2Mn, ≤ 3Ni, Co base, weld metal belong to Co-Cr-W or Co-Cr base alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112815A CN1083742C (en) | 1995-12-22 | 1995-12-22 | Composite shearing blade for shearing hot steel billet and its producing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95112815A CN1083742C (en) | 1995-12-22 | 1995-12-22 | Composite shearing blade for shearing hot steel billet and its producing method |
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| Publication Number | Publication Date |
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| CN1136485A true CN1136485A (en) | 1996-11-27 |
| CN1083742C CN1083742C (en) | 2002-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN95112815A Expired - Fee Related CN1083742C (en) | 1995-12-22 | 1995-12-22 | Composite shearing blade for shearing hot steel billet and its producing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804485A (en) * | 2010-04-06 | 2010-08-18 | 昆山长鹰硬质合金有限公司 | New tool bit |
| CN102451981A (en) * | 2010-10-29 | 2012-05-16 | 株式会社近畿 | Manufacturing method of cutting blade and cutting blade manufactured by same |
| CN103658931A (en) * | 2013-12-30 | 2014-03-26 | 太原重工轨道交通设备有限公司 | Double-layer bead welding method for axle swage block |
| CN105149729A (en) * | 2015-08-25 | 2015-12-16 | 太仓金马金属构件有限公司 | Tool welding technology |
| CN110666386A (en) * | 2019-10-17 | 2020-01-10 | 沈阳理工大学 | Research method for improving performance parameters of argon arc welding surfacing process |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9004124D0 (en) * | 1990-12-21 | 1990-12-21 | Sandvik Ab | HARD METAL TOOLS FOR CUTTING AND CUTTING |
| CN2111157U (en) * | 1991-10-20 | 1992-07-29 | 王树敏 | Scissors with alloy-layer |
| CN2109277U (en) * | 1991-10-30 | 1992-07-08 | 唐山钢铁公司附属企业公司 | Combined cutter for steel billet |
-
1995
- 1995-12-22 CN CN95112815A patent/CN1083742C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804485A (en) * | 2010-04-06 | 2010-08-18 | 昆山长鹰硬质合金有限公司 | New tool bit |
| CN102451981A (en) * | 2010-10-29 | 2012-05-16 | 株式会社近畿 | Manufacturing method of cutting blade and cutting blade manufactured by same |
| CN102451981B (en) * | 2010-10-29 | 2015-12-09 | 株式会社近畿 | The cutting edge that the manufacture method of cutting edge and the method manufacture |
| CN103658931A (en) * | 2013-12-30 | 2014-03-26 | 太原重工轨道交通设备有限公司 | Double-layer bead welding method for axle swage block |
| CN103658931B (en) * | 2013-12-30 | 2016-02-10 | 太原重工轨道交通设备有限公司 | The method of the double-deck built-up welding of a kind of axletree swage block |
| CN105149729A (en) * | 2015-08-25 | 2015-12-16 | 太仓金马金属构件有限公司 | Tool welding technology |
| CN110666386A (en) * | 2019-10-17 | 2020-01-10 | 沈阳理工大学 | Research method for improving performance parameters of argon arc welding surfacing process |
| CN110666386B (en) * | 2019-10-17 | 2021-05-25 | 沈阳理工大学 | Research method for improving performance parameters of argon arc welding surfacing process |
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| CN1083742C (en) | 2002-05-01 |
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