WO2018107313A1 - 一种QCr0.8与高强不锈钢的CMT焊接工艺 - Google Patents
一种QCr0.8与高强不锈钢的CMT焊接工艺 Download PDFInfo
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- WO2018107313A1 WO2018107313A1 PCT/CN2016/109399 CN2016109399W WO2018107313A1 WO 2018107313 A1 WO2018107313 A1 WO 2018107313A1 CN 2016109399 W CN2016109399 W CN 2016109399W WO 2018107313 A1 WO2018107313 A1 WO 2018107313A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- the invention relates to the technical field of welding process, in particular to a CMT welding process of QCr0.8 and high-strength stainless steel.
- manual argon arc welding is used to weld QCr0.8 chrome bronze and high-strength stainless steel.
- the method firstly grinds the surface to be welded on the steel side, and then uses the copper welding wire to weld the QCr0.8 chrome bronze and the high-strength stainless steel lap joint by manual argon arc welding.
- the QCr0.8 chrome bronze heats up quickly, ensuring the copper side. The fusion is good, and an effective molten pool is formed at the welded joint.
- the QCr0.8 chrome bronze and the high-strength stainless steel are manually argon-arc welded by a low welding speed and a large current. However, this method is liable to cause excessive welding heat input.
- a CMT welding process of QCr0.8 and high-strength stainless steel including QCr0.8 parts and high-strength stainless steel, the welding process includes the following steps:
- S4 performing welding to control the welding speed, welding current, welding voltage, wire feeding speed, swing speed and swing speed of the welding machine;
- the shape of the lap joint polished by the high-strength stainless steel in step S1 depends on the thickness of the QCr0.8 part; when the wall thickness of the QCr0.8 part is greater than 4 mm, the lap joint of the high-strength stainless steel is a flange welded joint; When the wall thickness of the QCr0.8 part is less than 4 mm, the lap joint of the high-strength stainless steel is a concave welded joint.
- the wall thickness of the QCr0.8 part is greater than 4 mm
- a gap is left between the flange welded joint and the inclined wall, and the gap distance is L2 (1.5 mm ⁇ L2 ⁇ 2.5 mm), and the inclined wall and the high strength
- the upper surface of the stainless steel has a certain inclination angle a (15 ° ⁇ a ⁇ 30 °).
- the wall thickness of the QCr0.8 part is less than 4 mm, a gap is left between the concave welded joint and the inclined wall of the flange, and the gap distance is L2 (2.5 mm ⁇ L2 ⁇ 3.5 mm), the flange
- the inclined wall has a certain inclination angle a (30° ⁇ a ⁇ 35°) between the upper surface of the high-strength stainless steel.
- the welding speed is 40-55 cm/min
- the welding current is 180-220 A
- the welding voltage is 18-29 V
- the wire feeding speed is 7-9 m/min
- the swing It is 0.5mm and the swing speed is controlled at 900cm/min.
- the welding speed is 28-34 cm/min
- the welding current is 160-188 A
- the welding voltage is 12-22 V
- the wire feeding speed is 4-7 m/min
- the swing It is 0.2mm and the swing speed is controlled at 900cm/min.
- the invention has the beneficial effects that the welding head of the QCr0.8 part and the high-strength stainless steel is set into two different structures, which can well ensure that the wall thickness of the QCr0.8 part 1 is different.
- the welding strength between the two is enhanced by different welded joints, and the CMT welding process can ensure the quality and stability of the welding.
- Figure 1 is a schematic view showing the structure of a first lap joint of the present invention
- FIG. 2 is a schematic view showing the welding posture of the first lap joint structure of the present invention
- FIG. 3 is a schematic structural view of a second lap joint of the present invention.
- FIG. 4 is a schematic view showing the welding posture of the second lap joint structure of the present invention.
- the present invention provides a technical solution: a CMT welding process of QCr0.8 and high-strength stainless steel, comprising QCr0.8 part 1 and high-strength stainless steel 2, the welding process comprising the following steps:
- the present invention provides a technical solution: a CMT welding process of QCr0.8 and high-strength stainless steel, comprising QCr0.8 part 1 and high-strength stainless steel 2, the welding process comprising the following steps:
- the wall thickness of the QCr0.8 part is less than 4mm, and the flange inclined wall 12 is machined for the QCr0.8 part;
- the invention sets the welding head of the QCr0.8 part 1 and the high-strength stainless steel 2 into two different structures, which can well ensure that the thickness of the QCr0.8 part 1 is different, and the two welded joints are used to enhance the The welding is firm and the CMT welding process guarantees the quality and stability of the weld.
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- Arc Welding In General (AREA)
Abstract
一种QCr0.8与高强不锈钢的CMT焊接工艺,该工艺经过打磨高强不锈钢(2);打磨QCr0.8零件(1);将打磨后的两者契合;进行焊接;焊后处理五个步骤将CMT焊接工艺运用到QCr0.8与高强不锈钢的焊接中,将QCr0.8零件(1)与高强不锈钢(2)的焊接头设置成两种不同的结构,可以很好的保证随着QCr0.8零件(1)壁厚的不同,通过不同的焊接头增强两者之间的焊接牢固性,同时CMT焊接工艺可以保证焊接的质量和稳定。
Description
本发明涉及焊接工艺技术领域,具体为一种QCr0.8与高强不锈钢的CMT焊接工艺。
现阶段采用手工氩弧焊进行QCr0.8铬青铜与高强不锈钢的焊接。该方法首先对钢侧待焊表面进行打磨,然后使用铜焊丝,采用手工氩弧焊的方法焊接QCr0.8铬青铜与高强不锈钢搭接接头,QCr0.8铬青铜散热较快,为保证铜侧熔合良好、焊接接头处形成有效的熔池,一般采用低焊速、大电流的方式进行QCr0.8铬青铜与高强不锈钢手工氩弧焊焊接。但是,此种方法容易造成焊接热输入过大。热输入增大时,在焊缝表面容易产生热裂纹,同时,在焊缝内部铜-钢交接处的钢侧将形成液态铜的渗透裂纹,由此造成铜-钢连接焊缝的强度大幅降低。同时,手工焊时焊缝接头较多,接头处因起弧、收弧而多次受热,使得晶粒严重长大,所以此处焊缝的塑性等显著下降;现有技术中冷金属过渡技术(俗称CMT)是一种全新的焊接工艺,将其运用在QCr0.8铬青铜与高强不锈钢的焊接工艺中不仅可以实现焊接过程中冷热交替,还能避免熔滴穿透实现无飞溅熔滴过渡和良好的冶金连接,将此方法运用于壁厚8mm—12mm的QCr0.8铬青铜与高强不锈钢(壁厚大于等于10mm)的焊接工艺中。
发明内容
本发明的目的在于提供一种QCr0.8与高强不锈钢的CMT焊接工艺,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:一种QCr0.8与高强不锈钢的CMT焊接工艺,包括QCr0.8零件和高强不锈钢,该焊接工艺包括以下步骤:
S1:在专用数控剪床上,对高强不锈钢进行打磨剪切预处理处理,确保
高强不锈钢的表面光洁度≤2.8um;在高强不锈钢的焊接头处打磨出具有一定倾斜形状的搭接头;
S2:对QCr0.8零件进行磨光处理,打磨出具有一定形状的搭接头;当QCr0.8零件的壁厚大于4mm时,对QCr0.8零件加工出倾斜壁;当QCr0.8零件的壁厚小于4mm时,对QCr0.8零件加工出凸缘斜壁;
S3:将待焊接件QCr0.8零件和高强不锈钢装夹,保证QCr0.8零件的搭接头与高强不锈钢的搭接头相契合,将契合后的搭接接头置于焊接机下方,并用夹具将QCr0.8零件和高强不锈钢固定;
S4:进行焊接,控制焊接机的焊接速度、焊接电流、焊接电压、送丝速度、摆幅和摆速;
S5:焊接后,待焊缝处的温度降至30℃-40℃时,对焊缝表面氧化层进行清理。
优选的,步骤S1中高强不锈钢所打磨出的搭接头的形状依QCr0.8零件的厚度而定;当QCr0.8零件的壁厚大于4mm时,高强不锈钢的搭接头为凸缘焊接头;当QCr0.8零件的壁厚小于4mm时,高强不锈钢的搭接头为凹形焊接口。
优选的,当QCr0.8零件的壁厚大于4mm时,所述凸缘焊接头与倾斜壁之间留有间隙,间隙距离为L2(1.5mm≤L2≤2.5mm),所述倾斜壁与高强不锈钢上表面之间呈一定倾斜角度a(15°≤a≤30°)。
优选的,当QCr0.8零件的壁厚小于4mm时,所述凹形焊接口与凸缘斜壁之间留有间隙,间隙距离为L2(2.5mm≤L2≤3.5mm),所述凸缘斜壁与高强不锈钢上表面之间呈一定倾斜角度a(30°≤a≤35°)。
优选的,当QCr0.8零件的壁厚大于4mm时,焊接速度为40-55cm/min、焊接电流为180-220A、焊接电压为18-29V、送丝速度为7-9m/min、摆幅为0.5mm、摆速控制在900cm/min。
优选的,当QCr0.8零件的壁厚小于4mm时,焊接速度为28-34cm/min、焊接电流为160-188A、焊接电压为12-22V、送丝速度为4-7m/min、摆幅为0.2mm、摆速控制在900cm/min。
与现有技术相比,本发明的有益效果是:将QCr0.8零件与高强不锈钢的焊接头设置成两种不同的结构,可以很好的保证随着QCr0.8零件1壁厚的不同,通过不同的焊接接头增强两者之间的焊接牢固性,同时CMT焊接工艺可以保证焊接的质量和稳定。
图1为本发明第一种搭接接头结构示意图;
图2为本发明第一种搭接接头结构形式的焊接姿态示意图;
图3为本发明第二种搭接接头结构示意图;
图4为本发明第二种搭接接头结构形式的焊接姿态示意图。
图中:1 QCr0.8零件、11倾斜壁、12凸缘斜壁、2高强不锈钢、21凸缘焊接头、22凹形焊接口。
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
参阅图1和2,本发明提供一种技术方案:一种QCr0.8与高强不锈钢的CMT焊接工艺,包括QCr0.8零件1和高强不锈钢2,该焊接工艺包括以下步骤:
S1:在专用数控剪床上,对高强不锈钢进行打磨剪切预处理处理,确保高强不锈钢的表面光洁度为2um;QCr0.8零件的壁厚大于4mm,将高强不锈钢
的焊接头打磨为凸缘焊接头21;
S2:QCr0.8零件的壁厚大于4mm,对QCr0.8零件加工出倾斜壁11;
S3:将待焊接件QCr0.8零件和高强不锈钢装夹,保证倾斜壁11和凸缘焊接头21相契合,将契合后的搭接接头置于焊接机下方,并用夹具将QCr0.8零件和高强不锈钢固定;
S4:进行焊接,控制焊接机的焊接速度为45cm/min、焊接电流为200A、焊接电压为18V、送丝速度为8m/min、摆幅为0.5mm、摆速控制在900cm/min;
S5:焊接后,待焊缝处的温度降至30℃时,对焊缝表面氧化层进行清理。
实施例2
参阅图3和4,本发明提供一种技术方案:一种QCr0.8与高强不锈钢的CMT焊接工艺,包括QCr0.8零件1和高强不锈钢2,该焊接工艺包括以下步骤:
S1:在专用数控剪床上,对高强不锈钢进行打磨剪切预处理处理,确保高强不锈钢的表面光洁度为1.8um;QCr0.8零件的壁厚小于4mm,将高强不锈钢的焊接头打磨为凹形焊接口22;
S2:QCr0.8零件的壁厚小于4mm,对QCr0.8零件加工出凸缘斜壁12;
S3:将待焊接件QCr0.8零件和高强不锈钢装夹,保证凸缘斜壁12和凹形焊接口22相契合,将契合后的搭接接头置于焊接机下方,并用夹具将QCr0.8零件和高强不锈钢固定;
S4:进行焊接,控制焊接机的焊接速度为31cm/min、焊接电流为170A、焊接电压为16V、送丝速度为5m/min、摆幅为0.2mm、摆速控制在900cm/min;
S5:焊接后,待焊缝处的温度降至40℃时,对焊缝表面氧化层进行清理。
本发明将QCr0.8零件1与高强不锈钢2的焊接头设置成两种不同的结构,可以很好的保证随着QCr0.8零件1壁厚的不同,通过不同的焊接接头增强两者之间的焊接牢固性,同时CMT焊接工艺可以保证焊接的质量和稳定。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (6)
- 一种QCr0.8与高强不锈钢的CMT焊接工艺,包括QCr0.8零件(1)和高强不锈钢(2),其特征在于,该焊接工艺包括以下步骤:S1:在专用数控剪床上,对高强不锈钢进行打磨剪切预处理处理,确保高强不锈钢的表面光洁度≤2.8um;在高强不锈钢的焊接头处打磨出具有一定倾斜形状的搭接头;S2:对QCr0.8零件进行磨光处理,打磨出具有一定形状的搭接头;当QCr0.8零件的壁厚大于4mm时,对QCr0.8零件加工出倾斜壁(11);当QCr0.8零件的壁厚小于4mm时,对QCr0.8零件加工出凸缘斜壁(12);S3:将待焊接件QCr0.8零件和高强不锈钢装夹,保证QCr0.8零件的搭接头与高强不锈钢的搭接头相契合,将契合后的搭接接头置于焊接机下方,并用夹具将QCr0.8零件和高强不锈钢固定;S4:进行焊接,控制焊接机的焊接速度、焊接电流、焊接电压、送丝速度、摆幅和摆速;S5:焊接后,待焊缝处的温度降至30℃-40℃时,对焊缝表面氧化层进行清理。
- 根据权利要求1所述的一种QCr0.8与高强不锈钢的CMT焊接工艺,其特征在于:步骤S1中高强不锈钢所打磨出的搭接头的形状依QCr0.8零件的厚度而定;当QCr0.8零件的壁厚大于4mm时,高强不锈钢的搭接头为凸缘焊接头(21);当QCr0.8零件的壁厚小于4mm时,高强不锈钢的搭接头为凹形焊接口(22)。
- 根据权利要求2所述的一种QCr0.8与高强不锈钢的CMT焊接工艺,其特征在于:当QCr0.8零件的壁厚大于4mm时,所述凸缘焊接头(21)与倾斜壁(11)之间留有间隙,间隙距离为L2(1.5mm≤L2≤2.5mm),所述倾斜壁(11)与高强不锈钢上表面之间呈一定倾斜角度a(15°≤a≤30°)。
- 根据权利要求2所述的一种QCr0.8与高强不锈钢的CMT焊接工艺, 其特征在于:当QCr0.8零件的壁厚小于4mm时,所述凹形焊接口(22)与凸缘斜壁(12)之间留有间隙,间隙距离为L2(2.5mm≤L2≤3.5mm),所述凸缘斜壁(12)与高强不锈钢上表面之间呈一定倾斜角度a(30°≤a≤35°)。
- 根据权利要求1所述的一种QCr0.8与高强不锈钢的CMT焊接工艺,其特征在于:当QCr0.8零件的壁厚大于4mm时,焊接速度为40-55cm/min、焊接电流为180-220A、焊接电压为18-29V、送丝速度为7-9m/min、摆幅为0.5mm、摆速控制在900cm/min。
- 根据权利要求1所述的一种QCr0.8与高强不锈钢的CMT焊接工艺,其特征在于:当QCr0.8零件的壁厚小于4mm时,焊接速度为28-34cm/min、焊接电流为160-188A、焊接电压为12-22V、送丝速度为4-7m/min、摆幅为0.2mm、摆速控制在900cm/min。
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WO2009105658A1 (en) * | 2008-02-22 | 2009-08-27 | Gkn Sinter Metals, Llc | Brazed component and method of forming a brazed joint therein |
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CN105397293A (zh) * | 2015-12-25 | 2016-03-16 | 江阴法尔胜佩尔新材料科技有限公司 | 镍钛合金与异种金属材料的焊接结构及其焊接方法 |
CN105965150A (zh) * | 2016-06-07 | 2016-09-28 | 中国船舶重工集团公司第七二五研究所 | 一种异种金属板之间的搅拌摩擦焊接方法 |
CN106425328A (zh) * | 2016-12-02 | 2017-02-22 | 机械科学研究总院青岛分院 | 一种QCr0.8与高强不锈钢的CMT焊接工艺 |
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