Surfacing method of alloy steel gear-wheel gear-ring transition layer

A technology of gear ring gear and alloy steel, applied in welding equipment, arc welding equipment, metal processing equipment, etc., can solve the problems of poor weldability, high tendency of cold cracking, high carbon equivalent of alloy steel, etc., to achieve enhanced weldability, Avoid the effect of cold cracks

Inactive Publication Date: 2009-04-01
JIER MACHINE TOOL GROUP
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Problems solved by technology

For this reason, a large number of alloy steel gears represented by 42CrMo have appeared on the market, but the carbon equivalent of alloy steel is rela

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  • Surfacing method of alloy steel gear-wheel gear-ring transition layer
  • Surfacing method of alloy steel gear-wheel gear-ring transition layer

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Embodiment Construction

[0018] The surfacing welding method of the transition layer of the alloy steel gear ring gear of the present invention is to weld a transition layer on the alloy steel gear ring gear under high temperature conditions, and then weld the web plate to the transition layer when the temperature returns to normal , so that the alloy steel gear ring has good weldability, thereby avoiding cracks in the welding process, the present invention includes the following specific steps:

[0019] The first step is to process the transition layer groove: such as figure 2 As shown, the machining method is used to process the transition layer groove 4 in the alloy steel gear ring 1, and then the groove 4 is cleaned.

[0020] The second step, preheating and heat preservation: put the alloy steel gear ring into the far-infrared furnace for preheating, the preheating temperature is 325°C-375°C, and keep it warm for 4 hours.

[0021] The third step, surfacing transition layer: take the alloy steel ...

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Abstract

The invention discloses a method for resurfacing-welding a transition layer of alloy steel gear and gear ring, including the following concrete steps: a machine tooling method is adopted for processing a groove of the transition layer in the alloy steel gear and gear ring, and the groove is cleaned out; the alloy steel gear and gear ring are put in a far-infrared oven for preheating, the preheating temperature is 325 DEG C to 375 DEG C, and the temperature is preserved for 3.5 to 4.5 hours; the alloy steel gear and gear ring are taken out from the far-infrared oven, and multi-layer multi-run welding is carried out by using CO2 gas shield welding; the alloy steel gear and gear ring are put in the oven immediately after welding for heating till being 325 DEG C to 375 DEG C, the temperature is preserved for 1 to 2 hours, and the alloy steel gear and gear ring are cooled to room temperature slowly along with the oven and taken out from the oven. The transition layer is cleared and polished, and then the inner diameter of the gear ring is processed by using a rotary machine tool; after processing, 20% of the gear rings are drawn for ultrasonic inspection examination. The method has the following beneficial effects: after the transition layer of the alloy steel gear and gear ring is resurfacing-welded by using the method, the weldability of the alloy steel gear and gear ring can be greatly enhanced, thereby being capable of avoiding the generation of cold cracks while welding.

Description

technical field [0001] The invention relates to a surfacing welding method for a gear ring gear transition layer, in particular to a surfacing welding method for an alloy steel gear ring gear transition layer. Background technique [0002] Traditional press gear rings are mostly made of No. 45 steel. After a certain heat treatment, the performance of gears made of No. 45 steel can basically meet the requirements of the press. However, for press gears with a small modulus, or high-speed and high-load presses, the gears made of No. 45 steel will be inexhaustible in terms of comprehensive performance such as strength, wear resistance, tooth surface pitting resistance, fatigue resistance and service life. As expected. For this reason, a large number of alloy steel gears represented by 42CrMo have appeared on the market, but the carbon equivalent of alloy steel is relatively high, so the cold cracking tendency of the alloy steel gear ring gear is relatively large, and the weldab...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/16B23K9/235B23K9/095
Inventor 金翠英龚成业王宏正
Owner JIER MACHINE TOOL GROUP
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