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Thick, large and high silicon molybdenum casting of nodular cast iron and preparation technology of casting

A nodular cast iron, preparation process technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve high temperature resistance, high temperature creep resistance, poor oxidation resistance, inability to withstand engine high temperature, low strength and rigidity And other problems, to achieve the effect of uniform hardness, stable structure, strength and oxidation resistance

Inactive Publication Date: 2019-01-15
TIANJIN BAOXIN CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a casting of thick and large high-silicon-molybdenum ductile iron and its preparation process, to solve the problem that the casting of ductile iron proposed in the above background technology cannot withstand the engine operation when it is applied to a marine turbocharger. High temperature, low strength and rigidity during use, high temperature resistance, high temperature creep resistance and oxidation resistance are not good, there are certain safety hazards during use

Method used

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  • Thick, large and high silicon molybdenum casting of nodular cast iron and preparation technology of casting
  • Thick, large and high silicon molybdenum casting of nodular cast iron and preparation technology of casting
  • Thick, large and high silicon molybdenum casting of nodular cast iron and preparation technology of casting

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Embodiment 1

[0026] see Figure 1-4 , the present invention provides a technical solution: a thick high-silicon-molybdenum ductile iron, including an outer casting 1, a channel 2 is opened inside the outer casting 1, an inner casting 3 is arranged inside the channel 2, and the inner casting 3 is passed through a reinforcing rib 4 is fixedly connected with the outer casting 1.

[0027] Further, the outer casting 1 is in an I-shape, and several installation holes 5 are symmetrically opened on the upper surface and the lower surface of the outer casting 1 .

[0028] Further, the number of reinforcing ribs 4 is three, and the three reinforcing ribs 4 are distributed in an annular array on the outer surface of the inner casting 3 , and the ends of the three reinforcing ribs 4 away from the inner casting 3 are all fixedly connected to the outer casting 1 .

[0029] Further, the outer casting 1, the inner casting 3 and the rib 4 are integrally formed by pouring.

[0030] Further, the casting of...

Embodiment 2

[0038] see Figure 1-4 , the present invention provides a technical solution: a thick high-silicon-molybdenum ductile iron, including an outer casting 1, a channel 2 is opened inside the outer casting 1, an inner casting 3 is arranged inside the channel 2, and the inner casting 3 is passed through a reinforcing rib 4 is fixedly connected with the outer casting 1.

[0039] Further, the outer casting 1 is in an I-shape, and several installation holes 5 are symmetrically opened on the upper surface and the lower surface of the outer casting 1 .

[0040] Further, the number of reinforcing ribs 4 is three, and the three reinforcing ribs 4 are distributed in an annular array on the outer surface of the inner casting 3 , and the ends of the three reinforcing ribs 4 away from the inner casting 3 are all fixedly connected to the outer casting 1 .

[0041] Further, the outer casting 1, the inner casting 3 and the rib 4 are integrally formed by pouring.

[0042] Further, the casting of...

Embodiment 3

[0050] see Figure 1-4 , the present invention provides a technical solution: a thick high-silicon-molybdenum ductile iron, including an outer casting 1, a channel 2 is opened inside the outer casting 1, an inner casting 3 is arranged inside the channel 2, and the inner casting 3 is passed through a reinforcing rib 4 is fixedly connected with the outer casting 1.

[0051] Further, the outer casting 1 is in an I-shape, and several installation holes 5 are symmetrically opened on the upper surface and the lower surface of the outer casting 1 .

[0052] Further, the number of reinforcing ribs 4 is three, and the three reinforcing ribs 4 are distributed in an annular array on the outer surface of the inner casting 3 , and the ends of the three reinforcing ribs 4 away from the inner casting 3 are all fixedly connected to the outer casting 1 .

[0053] Further, the outer casting 1, the inner casting 3 and the rib 4 are integrally formed by pouring.

[0054] Further, the casting of t...

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Abstract

The invention discloses a preparation method of a thick, large and high silicon molybdenum casting of nodular cast iron. An outer casting is included, a channel is formed in the outer casting, an inner casting is arranged in the channel, and fixedly connected to the outer casting via reinforcing ribs, and installation holes are formed symmetrically in the upper and lower surfaces of the H-shaped outer casting. The internal and external of the casting are connected via three ribs, so that the metallurgical phase and hardness in different positions of the casting are consistent, the phase transition temperature of AC1 is improved due to cooperation among different chemical components, the intensity and oxygen resistance of the casting at high temperature are both improved obviously, and theouter and inner castings are combined into the casting of a special structure via the channel, and the structure is more stable.

Description

technical field [0001] The invention belongs to the technical field of casting manufacturing of ductile iron, and in particular relates to a casting of thick, large and high-silicon-molybdenum ductile iron and a preparation process thereof. Background technique [0002] Ductile cast iron is a high-strength cast iron material developed in the 1950s. Its comprehensive performance is close to that of steel. It is based on its excellent performance that it has been successfully used to cast some complex stress, strength, toughness, and wear resistance. For parts with high performance requirements, nodular cast iron has rapidly developed into a cast iron material that is second only to gray cast iron and is widely used. [0003] When the original nodular cast iron castings are applied to the marine turbocharger, they cannot withstand the high temperature generated by the engine operation. During use, the strength and stiffness are low, and the high temperature resistance, high te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B39/00C22C37/10C22C37/04C22C33/08
CPCC22C33/08C22C37/04C22C37/10F02B39/00
Inventor 王传庆李振虎胡继亮
Owner TIANJIN BAOXIN CASTING
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