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Carbon steel casting

A carbon steel and casting technology, applied in the field of casting, can solve problems such as imperfect technology, and achieve the effect of less accidents, clear rules and perfect technology

Inactive Publication Date: 2014-11-05
JIANGSU HAIWEI GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to solve the problem of imperfect process in the prior art, the present invention provides a carbon steel casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A carbon steel casting, comprising the steps of:

[0024] (1) The heat treatment of carbon steel castings shall be normalized or annealed except those specified in the drawings and relevant technical documents. performance requirements;

[0025] (2) For the mechanical properties of carbon steel castings, the reduction of area and impact toughness shall be checked if there is no special requirement;

[0026] (3) The mechanical performance report shall include the hardness data of the test block;

[0027] (4) The chemical composition of carbon cast steel should comply with the regulations on the chemical composition of carbon cast steel;

[0028] (5) The amount of bending and warping deformation of the casting is measured according to the largest dimension of the inspected surface. On the non-processed surface, it should not be greater than the specified surface deformation of the casting, and on the concave part of the processed surface, the machining allowance should...

Embodiment 2

[0035] A carbon steel casting, comprising the steps of:

[0036] (1) The heat treatment of carbon steel castings shall be normalized or annealed except those specified in the drawings and relevant technical documents. performance requirements;

[0037] (2) For the mechanical properties of carbon steel castings, the reduction of area and impact toughness shall be checked if there is no special requirement;

[0038] (3) The mechanical performance report shall include the hardness data of the test block;

[0039] (4) The chemical composition of carbon cast steel should comply with the regulations on the chemical composition of carbon cast steel;

[0040] (5) The amount of bending and warping deformation of the casting is measured according to the largest dimension of the inspected surface. On the non-processed surface, it should not be greater than the specified surface deformation of the casting. In the concave part of the processing surface, the processing allowance shall n...

Embodiment 3

[0047] A carbon steel casting, comprising the steps of:

[0048] (1) The heat treatment of carbon steel castings shall be normalized or annealed except those specified in the drawings and relevant technical documents. performance requirements;

[0049] (2) For the mechanical properties of carbon steel castings, the reduction of area and impact toughness shall be checked if there is no special requirement;

[0050] (3) The mechanical performance report shall include the hardness data of the test block;

[0051] (4) The chemical composition of carbon cast steel should comply with the regulations on the chemical composition of carbon cast steel;

[0052](5) The amount of bending and warping deformation of the casting is measured according to the largest dimension of the inspected surface. On the non-processed surface, it should not be greater than the specified surface deformation of the casting. In the concave part of the processing surface, the processing allowance shall no...

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Abstract

The invention discloses a carbon steel casting. The method for manufacturing the carbon steel casting includes the steps of heat treatment of the carbon steel casting, and forming of a mechanical performance report, wherein when special requirements for the section shrinkage rate and impact toughness of mechanical performance of the carbon steel casting exist, the section shrinkage rate is detected; the mechanical performance report should comprise sample block hardness data, deformation amount of carbon on a non-machining surface should not be larger than that of the surface of the casting, and machining allowance not smaller than 1.5 mm should be guaranteed on the concave portion of a machining surface; surface roughness of the casting meets the requirement that the roughness of resin sand is Ra 25, and the roughness of sodium silicate sand is Ra 50; as for the unevenness of the surface of the casting, the concave portion should guarantee 1 / 3 machining allowance on the machining surface, the machining allowance of the convex portion is not larger than 5 mm, and when the non-machining surface has obvious protrusions with the machining allowance larger than 2 mm, grinding and leveling are allowed. The process is perfect, the procedures are detailed, rules are clear, unnecessary errors can be avoided, accidents are not prone to occurring, and safety of workers is guaranteed.

Description

technical field [0001] The invention relates to a carbon steel casting, which belongs to the field of casting casting. Background technique [0002] When the supplementary requirement S4 is specified in the casting production regulations, the repair welding shall be inspected by magnetic particle inspection according to the same standard used to inspect the casting. When the casting production regulations have supplementary requirements S5, the castings with leaks in the hydraulic test shall be repaired, or the depth of any pit at the place where the repair is to be welded exceeds 20% of the wall thickness or 1in.[25mm] (whichever is greater) minimum value), or any repair welding of castings in which the pit to be repaired exceeds approximately 10 in2 [65 cm 2 ], should be radiographically inspected using the same standards used to inspect castings, for depths exceeding 20 in2 of the wall thickness. % or 1in.[25mm], whichever is the lesser value in between, or where the are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D31/00B22C9/02B23P15/00
Inventor 张跃进
Owner JIANGSU HAIWEI GROUP
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