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Annular joint and processing method

A processing method and ring-shaped technology, applied in the field of material processing, can solve problems such as surface hardness, wear resistance, lack of corrosion resistance, and low strength, and achieve the effects of improving corrosion resistance, increasing practical life, and increasing strength

Inactive Publication Date: 2015-10-07
NINGBO HUI TONG MACHINE CONNECTION PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] No. 20 steel is one of the commonly used materials in industrial production. The steel has low strength, good toughness, plasticity and weldability. It

Method used

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Examples

Experimental program
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Example Embodiment

[0019] Example 1: A ring joint, the ring joint is processed from improved No. 20 steel, and the improved No. 20 steel is composed of the following chemical components by mass percentage: C: 0.22%; Si: 0.25 %; Mn: 0.65%; Ni: 0.04%; Cu: 0.12%; Ti: 0.006%; Nb: 0.008%; Cr≤0.20%; S≤0.025%;

Example Embodiment

[0020] Embodiment 2: a ring joint, the ring joint is processed from the improved No. 20 steel, and the improved No. 20 steel is composed of the following chemical components by mass percentage: C: 0.18%; Si: 0.20 %; Mn: 0.60%; Ni: 0.05%; Cu: 0.08%; Ti: 0.007%; Nb: 0.006%; Cr≤0.20%; S≤0.025%;

Example Embodiment

[0021] Embodiment 3: a ring joint, the ring joint is processed from the improved No. 20 steel, and the improved No. 20 steel is composed of the following chemical components by mass percentage: C: 0.20%; Si: 0.30 %; Mn: 0.70%; Ni: 0.04%; Cu: 0.18%; Ti: 0.005%; Nb: 0.007%; Cr≤0.20%; S≤0.025%;

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Abstract

The present invention relates to an annular joint and a processing method, and belongs to the technical field of material processing. The annular joint is machined from improved 20# steel, the improved 20# steel comprises the following chemical components by mass: 0.17%-0.23% of C; 0.17 %-0.35% of Si; 0.55%-0.75% of Mn; 0.03%-0.06% of Ni; 0.05%-0.20% of Cu; 0.005%-0.008% of Ti; 0.005%-0.01% of Nb; less than or equal to 0.20% of Cr; less than or equal to 0.025% of S; less than or equal to 0.025% of P; and the balance of Fe. The present invention also discloses a processing method of the annular joint, the improved 20# steel is first annular joint forged for forming an annular joint forge piece, the annular joint forge piece is thermally treated, the thermally treated annular joint forge piece is processed into an annular joint semi-finished product by a conventional mechanical roughing method, and an annular joint product is obtained by surface degreasing, pickling for rust removal, electroplating of zinc-nickel alloy, passivation and drying of the annular joint semi-finished product. The strength and corrosion resistance of the annular joint can be significantly increased, and the service life can be significantly prolonged.

Description

technical field [0001] The invention relates to an annular joint and a processing method thereof, belonging to the technical field of material processing. Background technique [0002] No. 20 steel is one of the commonly used materials in industrial production. This steel has low strength, good toughness, plasticity and weldability. It is often used to manufacture mechanical parts with high toughness requirements, but its surface hardness, wear resistance, corrosion resistance All are lacking. SUMMARY OF THE INVENTION [0003] Aiming at the defects existing in the prior art, the present invention provides an annular joint with high strength and toughness, and high temperature performance and long service life. [0004] The above object of the present invention can be implemented through the following technical solutions: a ring joint, the annular joint is processed from the improved No. 20 steel, and the improved No. 20 steel is composed of the following chemical componen...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C38/16C21D8/00C25D3/56
Inventor 徐静壮徐璐阳亮环吴兴良范孝理
Owner NINGBO HUI TONG MACHINE CONNECTION PARTS
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