Description
Welding Steel Parts Frame Structure Fabrication Component Framework Welded
Welding Steel Parts Refers To A Workpiece Which Can Be Combined By Heating Or Pressing, Or Both. According To The Different States Of Metals In The Welding Process, Welding Structure Can Be Divided Into Three Categories: Welded Steel Parts, Pressed Steel Parts And Brazed Steel Parts. Among Them, Arc Welding Steel Parts Are Most Commonly Used In Welded Frame.
Welded Steel Fabrication: Steel Parts Made By Melting The Base Metal At The Place To Be Welded, But Without Pressure To Form Welds.
Pressure Welding Steel Component: In The Welding Process, Pressure Must Be Applied (Heating Or Not Heating) To Complete The Welding Of Steel Parts, Including Solid-State Welding, Hot-Pressing Welding, Forging Welding, Diffusion Welding, Gas Pressure Welding And Cold-Pressing Welding.
Brazing Welded Steel Framework: Steel Parts Are Made By Using Metal Materials With Lower Melting Point Than Base Metal As Filler Metal, Heating Them To Temperatures Higher Than The Melting Point Of Base Metal, But Lower Than The Melting Point Of Base Metal, Wetting Base Metal With Liquid Filler Metal, Filling Gap Between Joints, And Diffusing With Base Metal To Realize The Connection Of Welding Parts. According To The Different Use Of Solder, It Can Be Divided Into Two Categories: Hard Brazed Steel Parts And Soft Brazed Steel Parts.
Characteristics:
1, Compared With Imperial Steel Parts, Welded Steel Structure Have The Advantages Of Saving Metal Materials, High Productivity, High Joint Strength, Good Sealing Performance, Easy To Realize Mechanization And Automation.
2, Compared With Cast Iron And Steel Parts, Welding Iron And Steel Parts Has The Advantages Of Simple Process, High Production Efficiency, Material Saving And Low Cost, Which Is Conducive To Product Renewal.
3, For Large And Complex Steel Structure Parts, The Composite Process Of Casting-Welding, Forging-Welding And Punching-Welding Is Adopted. It Can Realize The Simplification From Small To Large, And Overcome The Shortage Of Casting Or Forging Equipment Capacity. It Is Conducive To Reducing Costs, Saving Materials And Improving Economic Benefits.
4, It Can Connect Different Metals And Make Bimetallic Structure Easily. For Example, Cemented Carbide Blade And Turning Tool Rod Are Welded Together And a Layer Of Wear-Resistant Material Is Surfaced On The Worn Workpiece Surface To Prolong Its Service Life.
But There Are Also Some Shortcomings In Welding, Such As The Structure Can Not Be Dismantled, The Replacement And Repair Is Inconvenient, The Structure Of Welded Steel Parts Is Prone To Stress And Deformation, And The Steel Parts Are Prone To Welding Defects.
Welding Technology Is Mainly Used In The Manufacture Of Steel Parts With Metal Structure, Such As Building Structure, Hull, Vehicle, Aerospace, Electronic And Electrical Products, Boilers And Pressure Vessels.
Safety Technology
1, Work Clothes, Shoes And Gloves Should Be Worn Well Before Welding. Face Masks Must Be Used When Welding To Prevent Arc Damage To Skin, Face And Eyes.
2, Before Welding, Check Whether The Welding Machine Is Grounded, Whether The Insulation Of Cables And Welding Pliers Is Intact. The Welding Pliers Should Not Be Placed On The Connected Workbench Or Workpiece To Prevent Short-Circuit Burning Down The Welding Machine.
3, The Human Body Should Not Touch The Two Output Terminals Of The Welding Torch At The Same Time In Order To Prevent Electric Shock.
4, Fireworks Are Strictly Prohibited Near Oxygen Cylinders And Acetylene Occurrence Bottles For Gas Welding.
5, Check The Water Level Of Temper Preventer Before Gas Welding. Close The Acetylene Valve Immediately When Tempering Occurs. Check The Cause And Try To Eliminate It.
6, Do Not Spray Flame On Human Body And Rubber Pipe During Gas Welding.
7, The Newly Welded Parts Should Not Be Touched Directly By Hand. When Cleaning The Welding Slag, Attention Should Be Paid To The Surrounding Conditions, Control The Direction Of The Flying Out Of The Welding Slag, And Prevent Hot Slag Scalding Or Igniting Articles.
8, Welding Site Should Be Well Ventilated To Prevent Harmful Gases From Decomposition Of Pesticide Coating From Gathering Around Operators And Affecting Human Health.
9, Do Not Use The Naked Eye To Watch The Arc Directly. Before Starting The Arc, You Should Observe The Surroundings So As Not To Hurt Yourself And Others.
10, The Power Supply Should Be Cut Off After Welding, And The Residual Fire May Be Eliminated Before Leaving.
Materials We Can Choose As Below:
♠ High Quality Carbon Structural Steel: 20, 35, 45, 50, 55, 16Mn, 50Mn
♠ Carbon Tool Steel: T8 , T10
♠ Oil And Pressure Vessel Forging Steel : 16Mn, 20, 15CrMo, 20MnMo, 20MnMoNb, 35CrMo, 12Cr1MoV, 12Cr1MoV(P22), 14Cr1Mo, 20SiMn2MoV, SA-336F11CL3, SA-182F11CL3, SA-266/SA-266M, 25CrNiMo, 30CrMo, SA-336Cr.F22CL3, SA350-LF2, 21/4Cr1Mo
♠ Military Product Forgings: D406(30Si2MnCrMoVE)
♠ Power Station Forging: 26NiCrMoV14-5, 34CrMo1A
♠ Bearing Steel: GCr15, GCr15SiMn, G20Cr2Ni4A, GCr18Mo, 9Cr18Mo
♠ Alloy Structural Steel: 20~50SiMn, 40Cr, 42CrMo, 20~45CrMnMo, 45CrNiMnMo, 37SiMn2MoV, 40CrNiMoA, 40CrNi2MoA, 34CrNi3MoA, 34CrNiMo6, 30CrNiMo8, 20CrNi2MoA, 17CrNiMo6, 30Cr2Ni2Mo, 38CrMoA/A, 25Cr2Ni4MoV, 18Cr2Ni4W,
♠ Metallurgical Machinery Forgings Steel : 55Mn2, 60CrMnMo, 60CrNiMo, YB-15, 9Cr2Mo, 9Cr2MoV, 45Cr3NiMoV, 45Cr4NiMoV, 45Cr5NiMoV, 86CrMoV7, MC3, MC3A,
♠ Abrasive Steel : H13, B2, P20, 718, 5CrMnMo, 5CrNiMo.
