金属工艺学试题(Metal technology examination questions)

金属工艺学试题（Metal technology examination questions）Fill in the blanks (1, 40 cents per space)The mechanical properties of metal 1, mainly -------__________ ___________ ____________ etc..The basic structure of 2, iron carbon alloy at room temperature is ________ ________ _______ _______ and _________ etc..3, according to the common carbon steel carbon content is divided into __________ _________ __________.4, the process of heat treatment is composed of __________ ___________ ___________ three stages.5, the overall heat treatment is commonly used ___________________ __________ ___________ etc..6, according to the existing form of iron carbon ____________ ____________ ___________ ___________.7, according to the basic structure of gray cast iron with different ___________ ___________ _____________Copper alloy is widely used in industry, according to the 8 different _________ _________ __________ chemical composition.9 line can be divided into ___________ and ___________.10, the cutting amount mainly ___________ ________________________ called cutting three elements.11, usually the casting is divided into two categories____________ ____________.12, SMAW commonly used arc method is ____________ and____________.13, is the main tool of drilling drill, which is composed of __________ _________ and ___________.Two, individual choice questions (1 points per game, 40 points)1. Metallic materials exhibit mechanical propertiesA conductivity, B, oxidation resistance, C, thermal conductivity, D hardness2. The maximum nominal tensile stress before the break is calledA yield strength,B tensile strength,C plastic strength,D compressive strength3, the metal plastic judgment is based on the elongation andA hardness,B strength, C, section shrinkage, D yield limit4. The toughness of metals usually decreases with temperatureA gets better,B changes,C doesn't change,D is wrong5. In the phase diagram of iron carbon alloy, the ECF line isA liquidus,B eutectoid line,C solidus,D eutectic line6, steel is iron as the main element of iron carbon alloy, generally less than carbon contentA 0.77%,B 2.11%,C 4.3%,D 6.69%7, carbon steel impurities often exist, which is harmful elementsA silicon,B manganese,C sulfur,D carbon8, No. 45 high quality carbon steel, the average carbon content isA 45%,B 4.5%,C 0.45%,D 0.045%9, the cast steel ZG200 - 400 statement is correctA 200 is the minimum value of yield point, andB 200 is the lowest tensile strengthC 400 is the minimum yield point, andD 400 is the highest tensile strength10. The room temperature obtained after quenching is as followsA austenite,B cementite,C bainite,D martensite or bainite11, the 40Gr statement is correctA carburizing steel,B quenched and tempered steel,C tool steel,D high speed steel12. The following high-quality carbon structural steels are used for making springsA, Q195, B, 08F, C, 35, D, 65The average carbon content in 13 and T12 isA 12%,B 0.12%,C 1.2%,D 0.012%14. What is correct for complete annealing is thatA can reduce hardness,B is mainly used in eutectoid steel, andC is austenite after annealingD is not good for cutting15, alloy steel quenching commonly used cooling medium forA water,B oil,C brine, D, lime water16, in order to improve the corrosion resistance of steel parts for the purpose of optionalA carburizing;B quenching; C; high frequency heating; surface quenching; D nitriding17, the repeated tempering of W18Gr4V is correctA hardness decreased,B hardness increased,C hardness unchanged,D was wrong18. The graphite in malleable iron isA large shapedB clusterCD spherical worm19, when a part of the casting is white cast iron, will be heated 850 - 950 insulation, the purpose isA graphite is refined,B graphite is decomposed, andC cementite is decomposed into graphiteC graphite is decomposed into cementite days20, the performance of the rust aluminum is correctA weldableB without deformation,C strength lower than pure aluminum,D plastic difference21. What is wrong with the bronze statement?A, Wsn < 5%, suitable for cold working, B Wsn = 5% - 7%, suitable for hot workingC Wsn > 10%, suitable for casting C, Wsn > 20%, plastic is the best22. The following are thermosetting plasticsA electric jade,B polyethylene,C polypropylene,D fluoroplastic23. Safety glass isA a kind of plasticB rubber product,C ceramic product,D glass composite layer24, a shaft for 20.045 icon size, measurement tools forA B C dial vernier caliper micrometer D steel ruler25, the characteristics of fitter processing is correctA can produceB in large quantities and manufacturehigh-precision partsC strong workforce, smallD productivity26, when cutting, the body's center of gravity to fall inA left foot B, right foot C or so, feet can be D, right foot bent27, filing, file from a general speed per minuteA 10 times,B 10 - 20 times,C 20 - 30 times,D 30 - 60 times28, there is a material measurement of hardness of HBW500, to measure the pressure head statement is correctA round carbide ball,B round steel ball,C diamond taper,D diamond, four edges29, the greater the impact toughness of the material, its toughnessA the better, the worse the B, the C is neither, nor is the D above30. In the phase diagram of iron carbon alloy, the PSK line isa eutectoid line, and the eutectoid product isA ferrite, B, pearlite, C, austenite, D, bainite31. In the iron carbon alloy phase diagram, any iron or carbon alloy with any component below the ACEF line isA solidB liquidC liquid solid coexistenceD is wrong32 when carbon content in carbon steel is 20%, this kind of steel isA low carbon steel,B medium carbon steel,C high carbon steel,D carbon tool steel33, normalizing and annealing are correct compared toA normalizing cost is high,B normalizing time is long,C normalizing hardness is high,D normalizing strength is low34, cast iron white spot at the white phenomenon, the main reason is thatA chemical composition, B, cooling too slowly, C cooling too fast, D is wrong35. The description of malleable iron is correctA castingB graphite clusterC in strength than gray iron lowD short annealing time36, known as "Si Ming Ming" alloy aluminum isA antirust aluminium,B wrought aluminum alloy,C casting aluminium alloy,D super hard aluminium37, rubber statement is wrongA low elasticity,B good vibration absorption,C easy aging,D good insulation38, the dial indicator statement is correctThe A scale is 0.1MM B, and the scale is 0.01MM C. The absolute value can be measuredD small pointer, each grid reading is 0.01MM39, in order to achieve dimensional accuracy and surface roughness requirementsA B and C cross coarse file in the D file and push the fine, smooth and40, the thread processing is wrongA tap the thread before drilling,B tap is used to process the external threadC die processing threadD thread, first determine the rod diameterThree, Jane answer (6 points per game, a total of 12 points)1. What is the effect of grain size of metal on its mechanical properties? How to control the crystallization process of liquid metal in order to obtain fine grain?2. Explain the causes of welding stress and deformation. How to prevent and reduce welding deformation?Four, comprehensive questions (8 points)Draw a simplified diagram of the iron carbon alloy and analyze the equilibrium structure of the 45 steel when the liquid is cooled slowly to room temperature.Reference answerOne, 1, strength, hardness, plasticity, 2, ferrite, pearlite, cementite, austenite, austenite3, high carbon steel, medium carbon steel, low carbon steel 4, heating, insulation, cooling 5, annealing, normalizing, quenching, tempering6, white iron gray iron malleable cast iron ductile iron7 ferritic ferrite cast iron, pearlite grey cast iron, ferrite pearlite gray cast iron 8, brass bronze, 100 copper 9, natural rubber synthetic rubber, general rubber, special rubber 10, plane scribing, and stereo marking11, the cutting speed feed back engagement of 0.1mm 12, 0.05mm 0.02mm13, sand casting, special casting 14, knock method scratch。