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Surface quenching heat treatment method for railway wagon heavy duty vehicle coupler body and drawbar terminal pin hole

A technology of surface quenching and drawbar, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve problems such as slow quenching speed and unsafe propane

Inactive Publication Date: 2009-05-27
CHONGQING DAJIANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with this patented technology, the discontinuous surface quenching method of flame heating has a slow quenching speed, and it is not safe to use propane for flame quenching, and special equipment must be used.

Method used

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  • Surface quenching heat treatment method for railway wagon heavy duty vehicle coupler body and drawbar terminal pin hole
  • Surface quenching heat treatment method for railway wagon heavy duty vehicle coupler body and drawbar terminal pin hole
  • Surface quenching heat treatment method for railway wagon heavy duty vehicle coupler body and drawbar terminal pin hole

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Embodiment Construction

[0017] see figure 1 , figure 2 and image 3 , Surface A of the tail pin hole of Type 16 and Type 17 couplers needs to undergo surface heat treatment; surfaces B and C of the tail pin holes at both ends of the RFC drawbar need to undergo surface heat treatment. The A surface of the 16-type and 17-type couplers refers to the 90°-110° (except for the middle 10°-30°) of the inner wall of the tail pin hole of the coupler body (taking the center line of the coupler as the X-axis, passing through the point O perpendicular to the X-axis Centerline is the Y-axis) discontinuous curved surface. The two ends of the RFC type drawbar are similar to the tails of the 17-type and 16-type hook bodies respectively. The B surface is located at the end of the 17-type hook body, and the C surface is located at the end of the 16-type hook body. The B and C surfaces are the ends of the drawbar. 90°~110° (except the middle 10°~30°) of the inner wall of the pin hole (the center line of the drawbar ...

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Abstract

The invention discloses a coupler body for a heavy haul railway freight car and a method for quenching heat treatment of a tail pin hole surface of a traction rod, and belongs to technology of medium frequency induction heating surface quenching heat treatment of discontinuous arc surfaces of type 16 and 17 coupler bodies and tail pin holes of RFC type traction rods. The method adopts a profile modeling inductor to rationally set medium frequency parameters and match a rotatable turntable for clamping and positioning, comprises two process steps, and solves the difficulty that only local arc surface is subjected to induction heating arc surface quenching but rest areas are not quenched.

Description

technical field [0001] The patented technology of the present invention belongs to the medium-frequency induction heating surface quenching heat treatment technology of the discontinuous arc-shaped surface of the 16, 17-type hook body and the RFC-type drawbar tail pin hole. Background technique [0002] E-grade steel couplers, which meet the ever-increasing demand for heavy-duty and high-speed operation of railway freight cars, have gradually replaced C-grade steel couplers and become the main products used by trains running online. Under heavy-duty, high-speed operating conditions, mainly affected by multiple impact alternating loads, the core of E-grade steel coupler products is required to have high plasticity and toughness, which can be achieved through overall quenching and tempering heat treatment; The arc-shaped surface of the tail pin hole has high hardness and a certain wear-resistant layer. The medium-frequency induction heating continuous quenching surface treatme...

Claims

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Application Information

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IPC IPC(8): C21D9/00C21D1/18C21D1/42
CPCY02P10/25
Inventor 何志频范平王顺安石峰云胡永毅王汝光刘世全
Owner CHONGQING DAJIANG IND
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