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Examination Materials. Fill the following blanks 1.The useful impurity elements in carbon steel are ( ), the harmful elements are ( ). 2.The common heat.

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Presentation on theme: "Examination Materials. Fill the following blanks 1.The useful impurity elements in carbon steel are ( ), the harmful elements are ( ). 2.The common heat."— Presentation transcript:

1 Examination Materials

2 Fill the following blanks 1.The useful impurity elements in carbon steel are ( ), the harmful elements are ( ). 2.The common heat treatments of steel are ( ),( ), ( ). 3.The pressure vessels are classified as ( )( )( )( ) ( )according to the grades of pressure.

3 4.For iron based steel,the yielding stressσs is getting ( ), and the elastic modulus E is getting ( ) when the temperature is becoming higher. 5. The value of Poison’s ratio of steel () is ( ). 6. The mechanical properties of metal materials are ( ),( ), ( ) and ( ). 7Usual failure forms are respectively ( ) for an internal pressure vessel,( ) for an external pressure vessel,and ( ) for a flanged joint.

4 The impurity elements S,P may make respectively carbon steel ( ) brittleness, ( ) brittleness. Plastics is the ability of deformation without ( ) when a force act on the material. The strength properties of a material, such as ( ), ( ), and the plasticity properties,such as ( ),( ), have significant influences on its selection for a given application.

5 The material of 0Cr13 is ( ) steel, its contents of carbon is ( ). Selecting materials mainly depends on four kinds of mechanical properties.They are ( ),( ), ( ),and ( ).

6 Explain the meanings of each designation 1Cr18Ni9TiStainless Steel 1—0.1%(C),18—18%(Cr), 9—9%(Ni) QT450—5 2Cr13 20 10g 18MnMoNbR

7 Answer following question How to make a steel stick softer? Give two methods to decrease the thermal tresses in fixed-tubesheet heat exchanger. Write a typical steel’s Number according following requirement and point out the meaning of each number and alphabet. high carbon steel medium carbon steel

8 low carbon steel common carbon steel high grade steel super high grade steel boiling steel full killed steel semi-killed steel pressure vessel steel boiler steel

9 high silicon cast iron grey cast iron spherical graphite cast iron Stainless steel Chromium Stainless Steel Chromium-nickel Stainless Steel Low alloy steel alloy steel Heat-resisting Steel high temperature steel low temperature steel


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