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Preparation technology of biphase alloy steel tank container seal head

A preparation process and technology of dual-phase alloy, applied in the field of head, can solve problems such as low strength, and achieve the effects of small hot cracking tendency, good pitting corrosion resistance, and good comprehensive mechanical properties

Active Publication Date: 2014-12-31
YIXING HOKKAI HEAD PLATE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Austenitic stainless steel is non-magnetic and has high toughness and plasticity, but its strength is low, it is impossible to strengthen it through phase transformation, and it can only be strengthened by cold working

Method used

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  • Preparation technology of biphase alloy steel tank container seal head
  • Preparation technology of biphase alloy steel tank container seal head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The dual-phase alloy steel plate in this embodiment has a thickness of 6mm and a width of 1800mm, and its chemical composition mass percent is: C: 0.027%, Si: 0.87%, Mn: 1.90%, Cr: 21%, Ni: 6.00%, N: 0.16%, Mo: 3.20%, P: 0.025%, S: 0.015%, and the rest are Fe and unavoidable impurities.

[0031] A process for preparing a dual-phase alloy steel tank head, comprising the steps of:

[0032] (1) Cutting circle: Draw on the steel plate according to the shape of the drawing, adjust the knife distance, use plasma cutting, and transfer after confirming that there are no sundries;

[0033] (2) Welding: Place the wafer on the working platform of the plasma welding machine, spot-fix the weld, and then weld. The weld is welded on one side and formed on both sides. The weld must not be lower than the base material; the surface must not have cracks, pores, Defects such as arc craters, undercuts and slag inclusions, and no slag and spatter. The welds are ground on both sides, not lo...

Embodiment 2

[0050] The dual-phase alloy steel plate in this embodiment has a thickness of 6mm and a width of 1600mm, and its chemical composition mass percent is: C: 0.009%, Si: 0.70%, Mn: 1.50%, Cr: 22.00%, Ni: 5.00%, N: 0.18%, Mo: 3.00%, P: 0.022%, S: 0.011%, and the rest are Fe and unavoidable impurities.

[0051] The preparation method of this embodiment is as described in Example 1.

Embodiment 3

[0053] The dual-phase alloy steel plate in this embodiment has a thickness of 10mm and a width of 1800mm, and its chemical composition mass percent is: C: 0.022%, Si: 0.56%, Mn: 0.45%, Cr: 22.5%, Ni: 4.67%, N: 0.14%, Mo: 3.30%, P: 0.008%, S: 0.014%, and the rest are Fe and unavoidable impurities.

[0054] The preparation method of this embodiment is as described in Example 1.

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Abstract

The invention discloses a biphase alloy steel tank container seal head and a preparation technology thereof. The seal head is characterized in that the biphase alloy steel comprises the following components in percentage by mass: less than 0.030% of C, less than 1.00% of Si, less than 2.00% of Mn, 21.00-23.00% of Cr, 4.50-6.50% of Ni, 0.14-0.20% of N, 3.00-3.50% of Mo, less than 0.030% of P, less than 0.020% of S and the balance of Fe and inevitable impurities. The biphase alloy steel tank container seal head has the characteristics of good chloride stress corrosion resistance under low stress, good hole corrosion resistance, good corrosion fatigue resistance and erosion corrosion resistance, good comprehensive mechanical property, good weldability, small heat crack tendency and no preheating before the welding and thermal treatment after the welding, can be welded with heterogeneities such as austenitic stainless steel or carbon steel.

Description

technical field [0001] The invention relates to a head, in particular to a process for preparing a dual-phase alloy steel tank head. Background technique [0002] The material used for the existing tank head is mostly austenitic stainless steel. Austenitic stainless steel came out in Germany in 1913 and has always played the most important role in stainless steel. Its production and usage account for about 70% of stainless steel production and usage. Austenitic stainless steel refers to stainless steel with austenite structure at room temperature. When the steel contains about 18% Cr, Ni8%-10%, and C about 0.1%, it has a stable austenite structure. Austenitic chromium-nickel stainless steel includes the famous 18Cr-8Ni steel and the high Cr-Ni series steel developed on the basis of increasing Cr and Ni content and adding Mo, Cu, Si, Nb, Ti and other elements. Austenitic stainless steel is non-magnetic and has high toughness and plasticity, but its strength is low, it is im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/44B23P15/00
Inventor 王华陈建东张斌峰高艳华张立群
Owner YIXING HOKKAI HEAD PLATE
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