CN103231153A - A method for welding quenched ultra-high strength steel with common carbon structural steel - Google Patents
A method for welding quenched ultra-high strength steel with common carbon structural steel Download PDFInfo
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- CN103231153A CN103231153A CN201310079041XA CN201310079041A CN103231153A CN 103231153 A CN103231153 A CN 103231153A CN 201310079041X A CN201310079041X A CN 201310079041XA CN 201310079041 A CN201310079041 A CN 201310079041A CN 103231153 A CN103231153 A CN 103231153A
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Abstract
The invention relates to a method for welding a quenched ultra-high strength steel with a common carbon structural steel, particularly to an MAG welding method for welding a quenched ultra-high strength steel 35CrMnSiA with a common carbon structural steel ZG35 dissimilar material, and belongs to the field of welding dissimilar materials. The method comprises the following steps: warming the ultra-high strength steel material to a certain temperature, then putting into quenching oil to lower to room temperature, and putting into water to cool to room temperature after low tempering to obtain improved ultra-high strength steel material; warming the improved ultra-high strength steel material obtained in step one and the common carbon structural steel respectively, wherein the highest temperature can not be higher than the temperature which is 50 DEG C lower than the quenching temperature in step one; choosing at least four welding points, and performing welding through the adoption of the MAG welding method under the protection of missed gases; welding positioning welded ultra-high strength steel material with the common carbon structural steel, wherein the postheating temperature is the same as the temperature of weld preheating. Meanwhile, the method solves the problem of welding the dissimilar material after the ultra-high strength steel is quenched, and can greatly lower the cost.
Description
Technical field
The present invention relates to a kind of with the method for super-high strength steel quenching back with the carbon structural steel welding, be particularly related to a kind of super-high strength steel 35CrMnSiA method that back and carbon structural steel ZG35 foreign material MAG weld of quenching, belong to the welding field after a kind of steel heat treatment.
Background technology
The continuous development of industry, super-high strength steel is used gradually.When needs are made parts that have the different operating performance at the different operating position, but can not find a kind of while can satisfy the metal material of these performance requirements the time, the most reasonable, the most most economical practice is: adopt the Metal Material Welding combination of different performance, i.e. the welding of dissimilar metal.
The 35CrMnSiA same material is welded under annealed condition, and the generation that solves weld crack also is great difficulty.The quality of material and the selection of welding material are very important, must strictly control the S in the steel, P limit content≤0.015% to C, Si, S, P.Super-high strength steel phosphorus content and alloying element content are all very high, and crystallizing range is bigger, and segregation is more serious, thereby have bigger hot cracking tendency.The Ms transition temperature is lower, and its hardness of the martensite of Xing Chenging and fragility are bigger at low temperatures, and the cold crack tendency is more serious, so welding is very difficult.
The dissimilar metal welding is than metal solder difficulty of the same race and complicated, and especially, dissimilar metal welded the property extreme difference after super-high strength steel quenched.Except metal solder influence factor of the same race, also there is the difficulty on the metallurgy; Difference problem on the physical property and the melting of dissimilar metal etc.
1, the problem brought of the difficulty on the metallurgy, physical property difference
(1) fusing point: two kinds of melting point metal differences.During fusing, low melting point melts earlier and trickling takes place or produce incomplete fusion with refractory metal, and in addition, the metal that fusing point is high solidifies earlier and shrinks early, impels low melting point partial coagulation and weak state metal generation stress, causes crackle;
(2) thermal conductivity and specific heat are poor, cause the heat input unbalance, change crystallization condition;
(3) as the coefficient of expansion, it is inconsistent to cause cooling to be shunk, and produces thermal stress, crackle can occur.
2, the melting of dissimilar metal, melting have two conditions: both lattice types are identical close with the atom size.
High strength, high rigidity foreign material do not have the precedent that Welding Structure adopts after quenching.The super-high strength steel welding, the tendency that produces weld crack is big, is prone to pore and nonmetal slag inclusion.
Summary of the invention
The objective of the invention is in order to solve prior art with the problem of super-high strength steel 35CrMnSiA and carbon structural steel ZG35 Combination Welding technology, provide a kind of with the method for super-high strength steel quenching back with the carbon structural steel welding.
The objective of the invention is to be achieved through the following technical solutions.
Of the present invention a kind of with the method for super-high strength steel quenching back with the carbon structural steel welding, concrete steps are as follows:
Step 1, super-high strength steel material quench: the super-high strength steel material is warmed up to uniform temperature; Put into quenching oil then, be down to room temperature; Put into water again after the lonneal and be cooled to room temperature, obtain the super-high strength steel material after the modification;
Step 2, weld preheating: super-high strength steel material and the carbon structural steel with the step 1 gained heats respectively; Maximum temperature must not be higher than following 50 degree of temperature of step 1;
Step 3, tack welding: under the protection of mist, i.e. Ar80%～85%; CO
2Under 20%～15% the situation, select at least 4 pads arbitrarily, adopt the MAG welding method that super-high strength steel material and carbon structural steel are positioned welding;
Step 4, welding: adopt and the identical welding condition of step 3, super-high strength steel material and carbon structural steel behind the tack welding are welded, obtain finished product;
Step 5, after heat: the finished product after the welding is carried out after heat, and postheat temperature is identical with the weld preheating temperature;
Step 6, x-ray detection: with X-ray it is detected a flaw, make it meet relevant national standard.
The described super-high strength steel material of step 1 is 35CrMnSiA.
Described carbon structural steel is ZG35.
The condition of the described tack welding of step 3 is: welding wire HS-80; Gage of wire φ 1.2; Welding current 180A～220A; Weldingvoltage 20～24V; Protection mist Ar (80%～85%)+(CO
220%～15%).
Beneficial effect
1, of the present invention a kind of with the method for super-high strength steel quenching back with the carbon structural steel welding, solved prior art super-high strength steel 35CrMnSiA and carbon structural steel ZG35 have been made up the high problem of cost; Solved the difficult problem of the strong back foreign material welding of just having quenched of superelevation simultaneously; Can also greatly reduce cost.
2, of the present invention a kind of with the quench method of back and carbon structural steel welding of super-high strength steel, solve weapon industry and perplexed the quench welding combination difficult problem of back xenogenesis steel of super-high strength steel for many years.Adopt MAG solder technology welding super strong, the welding of high rigidity foreign material for weapon industry and opened up a new road.
The specific embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment 1
Of the present invention a kind of with the method for super-high strength steel quenching back with the carbon structural steel welding, concrete steps are as follows:
Step 1, super-high strength steel material quench: 35CrMnSiA is warming up to 900 °; Put into quenching oil then, be down to room temperature; After 230 ° of following lonneals, put into water again and be cooled to room temperature, obtain the 35CrMnSiA after the modification, this moment 35CrMnSiA σ b 〉=1620Mpa, HRC50～52, Ak 〉=36J;
Step 2, weld preheating: 35CrMnSiA and the carbon structural steel with the step 1 gained is heated to 170 ° respectively;
Step 3, tack welding: adopt the MAG welding method, welding wire HS-80; Gage of wire φ 1.2; Welding current 180A～220A; Weldingvoltage 20～24V; Protection mist Ar (80%～85%)+(CO
220%～15%); 6 points of uniform welding.
Step 4, welding: adopt and the identical welding condition of step 3, the 35CrMnSiA behind the tack welding and ZG35 are welded the finished product after obtaining welding;
Step 5, after heat: the finished product after the welding is carried out after heat, and postheat temperature is identical with the weld preheating temperature, is 170 °, is incubated 2 hours.
Step 6, x-ray detection: it is detected a flaw result of detection weld seam flawless, slag inclusion, incomplete fusion, lack of penetration with x-ray; Exist pore within weldquality I grade standard scope, satisfy the I level requirement of JB/T4730.2-2005 standard code.
Embodiment 2
Of the present invention a kind of with the method for super-high strength steel quenching back with the carbon structural steel welding, concrete steps are as follows:
Step 1, super-high strength steel material quench: 35CrMnSiA is warming up to 910 °; Put into quenching oil then, be down to room temperature; After 240 ° of following lonneals, put into water again and be cooled to room temperature, obtain the 35CrMnSiA after the modification, this moment 35CrMnSiA σ b 〉=1620Mpa, HRC50～52, Ak 〉=36J;
Step 2, weld preheating: 35CrMnSiA and the carbon structural steel with the step 1 gained is heated to 180 ° respectively;
Step 3, tack welding: adopt the MAG welding method, welding wire HS-80; Gage of wire φ 1.2; Welding current 180A～220A; Weldingvoltage 20～24V; Protection mist Ar (80%～85%)+(CO
220%～15%); 6 points of uniform welding.
Step 4, welding: adopt and the identical welding condition of step 3, the 35CrMnSiA behind the tack welding and ZG35 are welded the finished product after obtaining welding;
Step 5, after heat: the finished product after the welding is carried out after heat, and postheat temperature is identical with the weld preheating temperature, is 180, is incubated 2 hours.
Step 6, x-ray detection: it is detected a flaw result of detection weld seam flawless, slag inclusion, incomplete fusion, lack of penetration with x-ray; Exist pore within weldquality I grade standard scope, satisfy the I level requirement of JB/T4730.2-2005 standard code.
Claims (4)
1. one kind with the quench method of back and carbon structural steel welding of super-high strength steel, and it is characterized in that: concrete steps are as follows:
Step 1, super-high strength steel material quench: the super-high strength steel material is warmed up to uniform temperature; Put into quenching oil then, be down to room temperature; Put into water again after the lonneal and be cooled to room temperature, obtain the super-high strength steel material after the modification;
Step 2, weld preheating: super-high strength steel material and the carbon structural steel with the step 1 gained heats respectively; Maximum temperature must not be higher than following 50 degree of temperature of step 1;
Step 3, tack welding: under the protection of mist, i.e. Ar80%～85%; CO
2Under 20%～15% the situation, select at least 4 pads arbitrarily, adopt the MAG welding method that super-high strength steel material and carbon structural steel are positioned welding;
Step 4, welding: adopt and the identical welding condition of step 3, super-high strength steel material and carbon structural steel behind the tack welding are welded, obtain finished product;
Step 5, after heat: the finished product after the welding is carried out after heat, and postheat temperature is identical with the weld preheating temperature;
Step 6, x-ray detection: with X-ray it is detected a flaw, make it meet relevant national standard.
2. as claimed in claim 1 a kind of with the method for super-high strength steel quenching back with the carbon structural steel welding, it is characterized in that: the described super-high strength steel material of step 1 is 35CrMnSiA.
3. as claimed in claim 1 a kind of with the method for super-high strength steel quenching back with the carbon structural steel welding, it is characterized in that: described carbon structural steel is ZG35.
4. as claimed in claim 1 a kind of with the method for super-high strength steel quenching back with the carbon structural steel welding, it is characterized in that: the condition of the described tack welding of step 3 is: welding wire HS-80; Gage of wire φ 1.2; Welding current 180A～220A; Weldingvoltage 20～24V; The protection mist is Ar and CO
2, Ar accounts for 80%～85% of mist.
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| CN201310079041XA CN103231153A (en) | 2013-03-13 | 2013-03-13 | A method for welding quenched ultra-high strength steel with common carbon structural steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290572A (en) * | 2015-12-10 | 2016-02-03 | 山东钢铁股份有限公司 | Welding method for ultrahigh-strength steel |
| CN115041855A (en) * | 2022-06-30 | 2022-09-13 | 山河智能特种装备有限公司 | Welding structure and welding process for ultrahigh-strength steel and high-strength steel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55100892A (en) * | 1979-01-24 | 1980-08-01 | Mitsubishi Heavy Ind Ltd | Welding method for joint of dissimilar material |
| JP2003071589A (en) * | 2001-08-30 | 2003-03-11 | Kawasaki Steel Corp | Manufacturing method for high strength steel pipe joint for oil well |
| CN101337298A (en) * | 2007-07-05 | 2009-01-07 | 四川神坤装备股份有限公司 | Low-alloy high-strength steel welding process |
| CN101954524A (en) * | 2010-10-21 | 2011-01-26 | 蓬莱巨涛海洋工程重工有限公司 | Welding process of ultrahigh-strength steel and heterogeneous high-strength steel |
| CN102267000A (en) * | 2010-06-02 | 2011-12-07 | 哈尔滨建成集团有限公司 | Metal active gas (MAG) welding method for butting quenched low-alloy super-high-strength steel and high-quality carbon structural steel |
-
2013
- 2013-03-13 CN CN201310079041XA patent/CN103231153A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55100892A (en) * | 1979-01-24 | 1980-08-01 | Mitsubishi Heavy Ind Ltd | Welding method for joint of dissimilar material |
| JP2003071589A (en) * | 2001-08-30 | 2003-03-11 | Kawasaki Steel Corp | Manufacturing method for high strength steel pipe joint for oil well |
| CN101337298A (en) * | 2007-07-05 | 2009-01-07 | 四川神坤装备股份有限公司 | Low-alloy high-strength steel welding process |
| CN102267000A (en) * | 2010-06-02 | 2011-12-07 | 哈尔滨建成集团有限公司 | Metal active gas (MAG) welding method for butting quenched low-alloy super-high-strength steel and high-quality carbon structural steel |
| CN101954524A (en) * | 2010-10-21 | 2011-01-26 | 蓬莱巨涛海洋工程重工有限公司 | Welding process of ultrahigh-strength steel and heterogeneous high-strength steel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105290572A (en) * | 2015-12-10 | 2016-02-03 | 山东钢铁股份有限公司 | Welding method for ultrahigh-strength steel |
| CN115041855A (en) * | 2022-06-30 | 2022-09-13 | 山河智能特种装备有限公司 | Welding structure and welding process for ultrahigh-strength steel and high-strength steel |
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Application publication date: 20130807 |