Quick start to gas welder skillsPublished: 2010
Introduction The Quick Introduction to Gas Welder Skills is based on the junior and intermediate technical worker grade standards and professional skills appraisal specifications of the National Occupational Standards for Gas Welders. "Quick Introduction to Gas Welder Skills" systematically introduces the basic knowledge of gas welding, gas welding of commonly used ferrous metals, gas welding of commonly used non-ferrous materials, special gas welding methods, gas cutting processes and equipment, failure of welding structures, and safety technology of gas welders. The detailed basic methods and techniques of gas welding operations are provided through examples. To deepen understanding and achieve half the result with half the effort. "Quick Start of Gas Welder Skills" can be used as a textbook for mechanical majors in secondary vocational schools and training and study books for related industries; but given the characteristics of "Quick Start of Gas Welder Skills", it can also be used as a study book for migrant workers who are engaged in gas welding. And training materials.
Contents of the first unit of the basic knowledge of gas welding, gas welding, general topics, gas welding and gas cutting commonly used materials, gas welding, gas cutting used gas, gas welding, gas cutting materials used, gas welding, gas cutting equipment and tools, acetylene generator, 3. Gas cylinder 3. Pressure reducer 4. Welding torch 5. Cutting torch 6. Gas welding and gas cutting rubber hoses 4. Gas welding process and basic operation 1. Classification of gas welding flame 2. Selection of gas welding process parameters 3. Gas welding operation 4. Operational characteristics of flat welding, vertical welding, horizontal welding, and overhead welding. Topic 5: Stresses in welded joints 1. Stresses and stress concentrations in welded joints 2. Effects of welding residual stresses 3. Adjustment and elimination of welding residual stresses Gas welding topics of metal materials 1 Gas welding of carbon steels I. Types, properties and uses of carbon steels II Welding of low carbon steels III Welding of medium carbon steels IV Welding of high carbon steels V. Carbon cast steels Repair welding 6. Carbon steel gas welding example topic 2 Gas welding of ordinary low alloy steel 1. Classification and performance of ordinary low alloy steel 2. Weldability of ordinary low alloy steel 3. Ordinary low alloy steel Examples of gas welding of alloy steels Three topics of repair welding of cast iron I. Overview II. Problems of gas welding of cast iron 4. Gas welding of low alloy pearlite heat resistant steels I. Welding performance of low alloy pearlite heat resistant steels 2. Gas welding of low alloy pearlite heat resistant steels Process III. Examples of gas welding of low-alloy pearlite heat-resistant steels. Gas welding of five chromium-nickel austenitic stainless steels. 1. Chrome-nickel austenitic stainless steels and their welding properties. 2. Gas welding of chromium-nickel austenitic stainless steels. Example of gas welding of martensitic stainless steel The third unit is commonly used for gas welding of non-ferrous metal materials-gas welding of aluminum and aluminum alloys I. overview II, aluminum and aluminum alloy welding materials III, gas welding of aluminum and aluminum alloys II gas welding of copper and copper alloys 1 2. Overview 2. Welding performance analysis of copper and copper alloys 3. Welding methods of copper and copper alloys 4. Gas welding of copper and copper alloys 3. Gas welding of lead and lead alloys 1. Classification and performance of lead and lead alloys 2. Lead Weldability of lead and lead alloys III. Gas welding of lead and lead alloys 4. Examples of gas welding of lead and lead alloys V. The fourth unit of lead lining process Special gas welding methods Topics 1 Gas flame brazing 1 、 Welding fillers, fluxes and their choices 2. Common joint types and gaps for brazing 3. Brazing technology 4. Flame brazing equipment 5. Flame brazing of carbide tools and pipe joints 2. Gas flame spraying 1. Gas flame Wire spraying 2. Gas flame powder spraying 3. Gas flame powder spraying Fifth unit of gas cutting process and equipment topics 1 gas cutting equipment 1. oxygen-acetylene cutting equipment 2. oxygen-acetylene cutting torch 3. cutting nozzle 4. replaceable gas V. Attachments and additional tools Topic 2: Gas cutting process 1. Gas cutting specification 2. Manual oxygen cutting technology 3. Cutting devices and precautions 4. Common problems in cutting 3. Gas cutting safety protection Unit 6. Welding structure failure 1. Welding structure Failures and classifications 1. Failures caused by welding cracks 2. Failures caused by embrittlement of welded joints 3. Failures caused by welding stress and deformation 4. Failures caused by inclusions and pores in welds 5. Caused by corrosion of welded joints Failure VI. Problems caused by fatigue of welded joints 2. Brittle fracture of welded structures 1. Classification of welded structure fractures 2. 3. Reasons for brittle fracture of welded structure 3. Main factors affecting brittle fracture 4. Test of brittle fracture resistance of welded joint 5. Influence of welding structure manufacturing process on brittle fracture 6. Measures to prevent brittle fracture of welded structure Fatigue failure I. Fatigue fracture forms of welded structures II. Factors affecting fatigue strength of welded joints III. Measures to improve fatigue strength of welded joints Subject IV Creep fracture of welded structures I. Creep, creep curve and creep properties II High-temperature mechanical properties of metallic materials III. Factors affecting the long-term strength of steel and weld metal Topic V. Corrosion damage of welded structures I. Overview of corrosion II Stress corrosion damage of welded structures III. Corrosion fatigue of welded structures Seventh unit gas Welder safety technical topics: 1. Safe use of gas welding equipment and tools 1. Safety of acetylene generator 2. Safety of commonly used gas cylinders 3. Safety of pressure reducer 4. Safety of welding torch 2. Safety and health of welding labor Measures 1. Protection of welding fumes and toxic gases 2. Arc light protection 3. Four radiological protection, noise protection Reference