Henan Gnee New Material Co., Ltd hot-selling products
High Strength Gr5 Titanium Pipe
Ti-6A1-4V GR5 Titanium Alloy Plate
Wear Resistance Grade 12 Titanium Plate
Thin Wall Titanium Foil Strips
Gr1 Gr2 Gr5 Titanium Alloy Foil
Titanium, a metal with extremely active chemical properties, exhibits a strong affinity for oxygen, hydrogen, nitrogen, and other gases at high temperatures. This characteristic becomes particularly pronounced during titanium welding, as the temperature rises. Failure to strictly control the absorption and dissolution of these gases by titanium will undoubtedly pose significant challenges to the processing of titanium welded joints.
Significance of Titanium Welding Processing
In recent years, with the rapid development of China's economy, especially under the continuous advancement of reform and opening-up, the country's economic construction has achieved remarkable accomplishments. At the same time, significant progress has been made in welding processing technologies for pipelines and other engineering projects. As a common welding method, the quality control during titanium welding processing plays a crucial role in the formation of weld colors. The visual nature of weld colors provides important evidence for studying the relationship between weld color and welding quality in titanium welding processing.
Impact of Titanium's Properties on Titanium Welding Processing
Effects of Oxygen and Nitrogen: Oxygen and nitrogen form interstitial solid solutions in titanium, causing lattice distortion, increasing deformation resistance, and enhancing strength and hardness. However, they reduce plasticity and toughness. The presence of oxygen and nitrogen in the weld is detrimental and should be avoided as much as possible.
Effects of Hydrogen: An increase in hydrogen content sharply reduces the impact toughness of the titanium weld metal, with some reduction in plasticity. Additionally, hydrides can cause brittleness in the joint.
Effects of Carbon: At room temperature, carbon exists as an interstitial solid solution in titanium, increasing strength but reducing plasticity. When the carbon content exceeds the solubility limit, hard and brittle TiC is formed, distributed in a network pattern, which can easily cause cracks. Therefore, national standards stipulate that the carbon content in titanium and its alloys must not exceed 0.1%. During welding processing, it is essential to ensure that oil stains on the workpiece and welding wire are thoroughly cleaned to avoid increasing carbon content.
Analysis of Titanium's Weldability and Key Processing Points
Titanium has good weldability. Its low thermal conductivity ensures that only the area within the arc flame melts, with good fluidity. Additionally, titanium's small coefficient of thermal expansion further enhances its weldability. When performing titanium welding processing, the following points should be noted:
Protection of the Welding Zone and High-Temperature Areas After Welding: To prevent air from affecting the welding and high-temperature areas, strict protection of these areas is necessary. The use of 99.99% pure argon and a trailing protection shield is essential.
Processing Method of Weld Grooves: Weld grooves should be machined mechanically; grinding methods should not be used.
Avoidance of Spot Welding and Use of High-Frequency Arc Starting: Spot welding should be avoided as much as possible during the welding process, and high-frequency arc starting should be employed.
Control of Post-Weld Heat Treatment: Post-weld heat treatment should be avoided whenever possible. If necessary, the heat treatment temperature should be controlled below 650°C.
Relationship Between Weld Color and Quality in Titanium Welding Processing
Weld Color Changes and Their Defect Mechanisms: During titanium tube welding processing, the argon gas protection layer formed by the TIG welding torch can only protect the welding molten pool from the harmful effects of air. However, it does not protect the already solidified high-temperature weld and its adjacent areas. These areas still have a strong ability to absorb nitrogen and oxygen from the air. As oxidation gradually intensifies, the color of the titanium tube weld changes, and the plasticity of the weld decreases. The color changes sequentially as follows: silver-white (no oxidation), golden yellow (slight oxidation), blue (moderate oxidation), and gray (severe oxidation).
Judging Welding Quality by Weld Color: Experiments have shown that as the weld color darkens, indicating increased oxidation, the hardness of the weld also increases. Simultaneously, harmful substances such as oxygen and nitrogen in the weld increase, significantly reducing welding quality.
In summary, titanium welding processing is a complex and precise process that requires strict control of various factors to ensure welding quality. By deeply studying the properties and weldability of titanium, as well as mastering the correct processing points and precautions, we can better achieve high quality and efficiency in titanium welding processing.
Titanium products provided by Henan Gnee New Material Co., Ltd
CNC machined parts
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Custom CNC Machining Parts of Most Materials |
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Quotation |
According to your drawing(size, material, thickness, processing content and required technology, etc.) |
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Tolerance丨Surface Roughness |
+/-0.005 - 0.01mm 丨 Ra0.2 - Ra3.2(Customize avaiable) |
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Materials Avaiable |
Titanium,Aluminum, Copper, Stainless Steel, Iron, PE, PVC, ABS, etc. |
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Surface Treatment |
Polishing, general/hard/color oxidation, surface chamfering, tempering, etc. |
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Processing |
CNC Turning, Milling parts, Drilling, Auto Lathe, Tapping, Bushing, Surface Treatment, etc. |
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Testing Equipment |
CMM / Tool microscope / multi-joint arm / Automatic height gauge / Manual height gauge / Dial gauge / Roughness measurement |
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Drawing Formats |
PRO/E, Auto CAD, Solid Works , UG, CAD / CAM / CAE, PDF |
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1.) 24 Hours Online Service & Quickly Quote / Delivery.2.) 100% QC quality inspection before delivery, and can provide quality |
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Titanium tube
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Material
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Pure titanium and Titanium alloy
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Titanium Grade
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Grade 1-Unalloyed titanium
Grade 2-Unalloyed titanium
Grade 3-Unalloyed titanium
Grade 7-Unalloyed titanium plus 0.12 to 0.25 %palladium
Grade 9-Titanium alloy (3 % aluminum, 2.5 % vanadium)
Grade 12-Titanium alloy (0.3 % molybdenum, 0.8 % nickel),
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Standard
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ASTM B338/ASME SB338, ASTM B337/ASME SB337, ASTM B861/ASME SB861, ASTM B862/ASME SB862,AMS4911,AMS4928
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Shape
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Round Square Rectangle
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Type
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Seamless/Welded
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Seamless titanium tube: Titanium sponge-Compacting electrodes-melting-Forge-Bar billets-Extruding-Rolled-Straightening-Seamless tube
Welded titanium tube: Titanium sponge-Compacting electrodes-melting-Forge-Plate billets-Hot rolled-Cold rolled-Titanium scrap-Welded-Welded tube |
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Surface
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Polishing, picking, acid washed, black oxide
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Application
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1) Heat Exchanger, Condensers, Water Treatment, Desalination
2) Fluid, gas and oil transport
3) Pressure and heat transmission
4) Construction and ornament
5) Motorbycle and bike
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Material Milling Certificate
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According to. EN 10204.3.1
Including Chemical composition and Mechanical property |
Titanium rod
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Production Name |
Titanium Alloy Bar |
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Grade |
Gr1, Gr2, Gr3,Gr4,Gr5, Gr7, Gr6,Gr9, Gr11, Gr12 ,Gr16, Gr17,Gr25 |
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Size |
All sizes can be customized |
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Application |
Metallurgy, electronics, machinery, medical treatment, chemical industry, petroleum, medical treatment, aerospace |
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Feature |
High corrosion resistance, low density, good thermal stability |
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Technology |
Hot Forged, Hot Rolled, Cold Rolled, Annealing, Pickling |
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Surface |
Bright, Polished, Pickling, Acid cleaning, Sandblasting |
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Packing |
Export Standard Woodcase |
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Delivery time |
10-25days according to the quantity and process of the product |
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Quality and test |
Hardness test, Bending test, Hydrostatic etc. |
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Titanium sheet/plate/strip
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Material
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Pure titanium and Titanium alloy
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Titanium Grade
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GR1/GR2/GR3/Gr4/GR5/GR7/GR9/GR12/Gr5Eli/Gr23/Ti-15333 etc
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Standard
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ASTM B265/ASME SB265, ASTMF67, ASTM F136, ISO-5832-2(3),AMS 4911 etc
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Shape
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Titanium foil strip/Titanium sheets plate/Titanium coil
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Thickness
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0.02mm~100mm
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Width
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10-3000mm,customizable
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Length
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Customizable
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Surface
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Pickled/Sandblasting/Polishing
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Main Technique
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Hot Rolled /Cold Rolled
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Heat Treatment
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Usually are Annealled,but Solid Solution & Aging can be also OK
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Material Milling Certificate
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According to. EN 10204.3.1
Including Chemical composition and Mechanical property |
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Application
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Metallurgy, Electronics, Medical, Chemical, Petroleum, Pharmaceutical,aerospace, etc.
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Titanium wire
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Product |
Medical Grade Titanium Wire (ASTM F67 / ASTM F136) for Surgical & Dental Applications |
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Size |
Straight Wire: 0.1mm - 5.0mm, Tolerance: ±0.05mm, Max Length: 3000mm (118") |
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Material |
Medical Use: Gr1, Gr2, Gr5 (Ti-6Al-4V), Gr23 (Ti-6Al-4V ELI) |
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Standard |
ASTM F67, ASTM F136 (For Medical & Dental Applications) |
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Surface |
Polished, Pickled, Oxide-Free, Black (Oxidized) – Based on Application |
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Shape |
Straight Wire, Coiled Wire (On Spool), Cut-to-Length Available |
About Us
Henan Gnee New Material Co., Ltd is a trusted exporter of high-purity titanium raw materials. We utilize advanced forging and precision CNC machining to ensure superior product quality. Every shipment is guaranteed through a rigorous pre-shipment inspection process, verifying chemical composition, mechanical properties, and dimensional accuracy to meet global standards.
Email:sale@gneemetal.com
