CN1069216A - A kind of welding rod that is used for the medium carbon heat treated high strength steel gear - Google Patents
A kind of welding rod that is used for the medium carbon heat treated high strength steel gear Download PDFInfo
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- CN1069216A CN1069216A CN 92106203 CN92106203A CN1069216A CN 1069216 A CN1069216 A CN 1069216A CN 92106203 CN92106203 CN 92106203 CN 92106203 A CN92106203 A CN 92106203A CN 1069216 A CN1069216 A CN 1069216A
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Abstract
A kind of welding rod that is used for the medium carbon heat treated high strength steel gear, it is that employing Mn-Ni-Cr-Mo-B is an alloy system.Scrap gear with this welding rod reparation wearing and tearing and need not annealing, directly built-up welding under quality adjustment condition, postwelding also needn't carry out modifier treatment.Built-up welding backgear case hardness, intensity are all good than typical gear steel, and toughness has also improved many, and improve more than 20% than new gear service life, and the expense of repairing old gear is only for making 35～45% of new product expense.Therefore utilize the present invention can reach the effect of economical with materials, energy savings, have favorable economic benefit.
Description
The invention belongs to the welding material of medium carbon heat treated high strength steel gear.
The welding material of built-up welding gear is to adopt J according to the introduction of welder's handbook at home at present
506, J
507, J
607And J
857Deng welding rod.J
506And J
507Be carbon steel, J
607And J
857Be low-alloy high-strength steel welding rod, J
607And J
857What adopt is Mn-Mo system alloy.Adopt above-mentioned welding rod built-up welding gear, adopt the preceding annealing of weldering postwelding quenching technical.The gear of built-up welding reparation is the miniature gear of used with tractor, and weight is light, modulus is less.Domestic at other welding rods that adopt aspect the reparation gear, as Monkey King board Mk-J
856The Fe welding rod, its alloying component (percentage by weight) C is 0.05～0.13; Mn is 1.15～1.82; Si is 0.31～0.52; Mo is 0.15～0.89; Ni is 0.71～2.31, and a small amount of trade mark also contains W, Ti, Cr, but its content is below 0.5.
Through patent office searching's welded gear material of going abroad, as the OK75.75 welding rod among the ESAB, its alloying component (weight %) C is 0.05, and Si is 0.3, and Mn is 1.5, and Cr is 0.35, and Ni is 1.8, and Mo is 0.4.Introducing its welding rod chemical composition (weight %) C in the Oerlikon welding rod specification is 0.04～0.10; Mn is 1.3～2.0; Si is 0.20～0.50; Ni is 1.25～2.50; Mo is 0.25～0.60; Cr is 0.60～1.0, and all the other are Fe.The Japan Patent technology is found two pieces of patent documentations in retrieval, i.e. clear 61-17363 of TP-and the clear 60-174265 of TP.Clear-61-17363 document is introduced its chemical composition and is (%): C:0.07～0.15; Si≤0.6; Mn≤1.0; Cr:0.5～3.5; Mo:0.3～1.5; Ni≤0.2; O:0.020～0.080; Clear 60-174265 document is introduced its chemical composition (%): C:0.03～0.15; Si:0.4～0.6; Mn:0.5～1.0; Cr:12～14; Ni:1～8 are also added as required and can be added elements such as 0.5～2% V, Co, Mo.These two kinds of welding rods of Japan are to be used in the transition material of built-up welding at the casting roller, and carbon, manganese, chromium, copper content are all lower, its objective is bottoming usefulness, reduce the crackle tendency of the wearing layer of built-up welding.
The objective of the invention is to design a kind of welding rod of new alloy system,, make the medium carbon heat treated high strength steel gear regeneration after exhibition is decreased by the method for fairly simple built-up welding.
China's metallurgy, machinery, mine and building etc. generally adopt mechanical drive gear, and wherein material is a medium carbon heat treated high strength steel greatly, as 40Cr, 38MoNi and 35CrMo etc.This type gear is scrapped after service wear lost efficacy all.If on the flank of tooth of wearing and tearing, the build-up wear-resistant metal is formulated a cover feasible technology rationally for built-up welding simultaneously, just can make the gear regeneration of scrapping.Since the built-up welding metal more wear-resisting than its material, the service life that also can improve gear.
Welding rod of the present invention is that employing Mn-Ni-Cr-Mo-B is an alloy system, and adopts the alkaline low-hydrogen type slag system.Its welding rod alloy composition is (percentage by weight): C:0.08～0.20; Si:0.20～0.60; Mn:1.05～1.60; Cr:2.0～3.5; Ni:1.0～2.0; Mo:0.41～1.0; B≤0.001; P and S≤0.03, all the other are Fe.
The welding rod of this alloy system, the content of carbon adopt lower bound for well in prescribed limit, and promptly phosphorus content is 0.10～0.12%, the content optimum range of manganese is 1.1～1.3%, the optimum content of chromium is 2.8～3.2%, and the optimum content of nickel is 1.2～1.4%, and the optimum content of molybdenum is between 0.5～0.6%.Alloy system of the present invention is on manganese, silicon, molybdenum basis, adds certain nickel and chromium, and main purpose is to increase part to be welded gear surface intensity and hardness.Improve toughness simultaneously.This welding rod increases the B element in addition, and its action principle is that boron and hydrogen, oxygen all have very strong affinity, so can reduce the content of hydrogen in the weld metal, oxygen, nitrogen.Test shows the deposited metal boron content when 0.001% left and right sides, deposited metal hydrogen content (H
2/ 100g) than not boracic reduction by 30～50%, because the reduction of weld metal hydrogen content, the cold crack that has therefore reduced weld seam is inclined to.Adopt this kind welding rod built-up welding deposited metal mechanical performance and relatively seen Table 1 by the performance of weldering gear steel:
Table 1 surfacing welding deposited metal mechanical performance and gear steel performance are relatively
Adopt advantage welding rod built-up welding abrased gear of the present invention, the gear of its wear out failure need not annealing, directly built-up welding reparation under quality adjustment condition, take integral body to give heat, the constant temperature welding covers on wearing layer to change layer, can be beneficial to flank of tooth processing, carry out whole stress relief annealing then, the gear after the built-up welding reparation need not to carry out modifier treatment.Behind the machining mill teeth, can reuse.Adopt novel welding material, as can be seen from Table 1, the hardness intensity after the built-up welding exceeds 34% and 20% all than typical gear steel as 38CrMoNi, and toughness has also improved many.
Be one embodiment of the present of invention below.Since nineteen ninety, the full built-up welding reparation after we wear and tear at Anshan, Anshan iron and steel plant east sintering plant ball mill shaft gear.Ball mill shaft gear chemical composition (%) sees Table 2, and pinion steel mechanical performance and important technological parameters see Table 3.
Table 2 ball mill shaft gear chemical composition (%)
Table 3 pinion steel mechanical performance and important technological parameters
Now repair 10 of gears with this welding rod built-up welding, postwelding is all qualified through every quality inspection, and wherein existing 6 gears are used to produce normal operation.Use is the result show, worn and torn after the gear built-up welding reparation of scrapping, and not only can replace new product to use fully, and also improve 20% service life.
Use built-up welding reparation wearing and tearing of the present invention to scrap gear, can make the medium carbon heat treated high strength steel gear regeneration of wear out failure, and can obviously improve its service life.Reparation is scrapped the expense of gear only for making 35～45% of new product expense, and therefore, the invention of the modified high strength gear of carbon during this kind built-up welding reparation is scrapped is undoubtedly the extensively good of economical with materials, energy savings.This invention is to heavily loaded large gear, and economic benefit is remarkable more.
Claims (2)
1, a kind of welding rod that welds the medium carbon heat treated high strength steel gear is characterized in that the chemical composition of this welding rod is (percentage by weight): C:0.80～0.20; Si:0.20～0.60; Mn:1.05～1.60; Cr:2.0～3.5; Ni:1.0～2.0; Mo:0.41～1.0; B≤0.001; P and S≤0.03, all the other are Fe.
2, the welding rod of the described medium carbon heat treated high strength steel gear of claim 1 is characterized in that the optimum content scope of the chemical composition (percentage by weight) of this welding rod is: C:0.10～0.12; Mn:1.1～1.3; Cr:2.8～3.2; Ni:1.2～1.4; Mo:0.5～0.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106203 CN1030382C (en) | 1992-05-21 | 1992-05-21 | Welding rod used for medium carbon steel gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106203 CN1030382C (en) | 1992-05-21 | 1992-05-21 | Welding rod used for medium carbon steel gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1069216A true CN1069216A (en) | 1993-02-24 |
| CN1030382C CN1030382C (en) | 1995-11-29 |
Family
ID=4941895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106203 Expired - Fee Related CN1030382C (en) | 1992-05-21 | 1992-05-21 | Welding rod used for medium carbon steel gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030382C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054796C (en) * | 1993-10-09 | 2000-07-26 | 刘玉玺 | Repairing method for heavy abrasion gear |
| CN102294566A (en) * | 2010-11-23 | 2011-12-28 | 武汉开明高新科技有限公司 | Method for repairing hardened gear |
| CN102463402A (en) * | 2010-11-18 | 2012-05-23 | 成都植源机械科技有限公司 | Process for welding medium-high carbon steel without cracking and deformation |
| CN103212920A (en) * | 2013-03-30 | 2013-07-24 | 首钢总公司 | Welding wire suitable for big hot-rolling back-up roll submerged arc overlaying welding |
| CN105014260A (en) * | 2015-07-30 | 2015-11-04 | 鞍钢集团工程技术有限公司 | Welding rod and welding method for repair welding of high-strength steel wheel |
-
1992
- 1992-05-21 CN CN 92106203 patent/CN1030382C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054796C (en) * | 1993-10-09 | 2000-07-26 | 刘玉玺 | Repairing method for heavy abrasion gear |
| CN102463402A (en) * | 2010-11-18 | 2012-05-23 | 成都植源机械科技有限公司 | Process for welding medium-high carbon steel without cracking and deformation |
| CN102463402B (en) * | 2010-11-18 | 2014-04-02 | 成都植源机械科技有限公司 | Process for welding medium-high carbon steel without cracking and deformation |
| CN102294566A (en) * | 2010-11-23 | 2011-12-28 | 武汉开明高新科技有限公司 | Method for repairing hardened gear |
| CN102294566B (en) * | 2010-11-23 | 2013-03-20 | 武汉开明高新科技有限公司 | Method for repairing hardened gear |
| CN103212920A (en) * | 2013-03-30 | 2013-07-24 | 首钢总公司 | Welding wire suitable for big hot-rolling back-up roll submerged arc overlaying welding |
| CN105014260A (en) * | 2015-07-30 | 2015-11-04 | 鞍钢集团工程技术有限公司 | Welding rod and welding method for repair welding of high-strength steel wheel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1030382C (en) | 1995-11-29 |
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