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Method for manufacturing austempered ductile iron (ADI) front axle of heavy truck by sand casting

A technology of austempering and nodular cast iron, which is applied in the direction of axles, manufacturing tools, casting and molding equipment, etc., can solve the problems of difficulty in guaranteeing density and performance reliability, high manufacturing cost, and low mechanical properties, so as to prevent graphite from decaying and improve Effects of improving mechanical properties and fatigue life

Inactive Publication Date: 2011-10-19
DALIAN XINZHONG GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention solves the problems of difficult guarantee of internal density and performance reliability of ADI products and low mechanical properties in terms of blank manufacturing process, surface cleaning process and inspection method, thereby solving the problems of traditional forged automobile front axle test and high manufacturing cost and cycle time. long question

Method used

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  • Method for manufacturing austempered ductile iron (ADI) front axle of heavy truck by sand casting
  • Method for manufacturing austempered ductile iron (ADI) front axle of heavy truck by sand casting
  • Method for manufacturing austempered ductile iron (ADI) front axle of heavy truck by sand casting

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Embodiment 1～5

[0077] Furan no-hardening resin sand mold is used, and chrome ore sand surface sand with a thickness of not less than 30mm is laid on the surface of the sand mold, and all core sand is made of chrome ore sand; the process ratio of the core sand is:

[0078] 1. Shape

[0079] The process ratio of the core sand is:

[0080] (1) Face sand:

[0081] Chrome ore 100%;

[0082] Furan resin is 1.5% of the amount of sand;

[0083] Curing agent is the percentage of resin amount: embodiment 1 is 45%, embodiment 2 is 40%, embodiment 3 is 40%, embodiment 4 is 45%, embodiment 5 is 45%;

[0084] (2) Sand mold:

[0085] 20% new sand, 80% old sand;

[0086] Furan resin is 1.0% of the total sand amount;

[0087] Curing agent is the percentage of resin amount: embodiment 1 is 45%, embodiment 2 is 40%, embodiment 3 is 40%, embodiment 4 is 45%, embodiment 5 is 45%;

[0088] (3) Core sand:

[0089] Chrome ore 100%;

[0090] Furan resin is 1.5% of the amount of sand;

[0091] Curing agent ...

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Abstract

The invention discloses a method for manufacturing an austempered ductile iron (ADI) front axle of a heavy truck by sand casting. By the method, nickel molybdenum copper austempered ductile iron (ADI) front axle of the heavy truck is produced by a furane resin sand molding process, and the problems that the internal density and the performance reliability of ADI products are difficult to guarantee and the mechanical properties of the ADI products are low are solved. The method has the following steps of: firstly, casting a blank of the nickel molybdenum copper alloyed spheroidal graphite cast iron front axle by the furane resin sand molding process; secondly, performing the surface shot peening strengthening and isothermal quenching heat treatment; and finally machining the front axle parts. By the method, casting is replaced by forging, and the iron is replaced by steel, the comprehensive mechanical properties are obviously higher than those of common spheroidal graphite cast iron and forged steel, the weight of truck parts is reduced, the investment of heavy forging equipment and dies is saved, the cost is reduced, the production cycle is shortened, energy is saved, the emission is reduced, and the economic benefit and the social benefit are obvious.

Description

technical field [0001] The invention relates to a method for manufacturing a front axle of a sand-casting truck, in particular to a method for manufacturing the front axle of a sand-casting isothermally quenched nodular cast iron truck. Background technique [0002] The front axle of a traditional truck is made of high-quality alloy structural steel such as 40Cr or 42CrMo, and is formed by die forging with large-scale forging equipment. However, on the one hand, due to the large amount of material heads and edges remaining after die forging, the utilization rate of materials is low, so that the material cost of the forging front axle is high; on the other hand, due to the need to use multiple sets of forging dies, the The manufacturing cost is relatively high. For example, for the front axle of a 60-ton dump truck, a set of forging dies costs several million yuan, which greatly increases the production cost; and forging the front axle requires the use of large-scale forging ...

Claims

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Application Information

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IPC IPC(8): B22C9/02C22C37/04C22C33/10C21D5/00C21D9/28B60B35/00
Inventor 卜立杰王怀林曲国辉周霞张奇志曹庆元
Owner DALIAN XINZHONG GRP
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