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Preparation method for anti-scratch automobile sound-reducing box

A muffler box and scratch-resistant technology, applied in the field of auto parts, can solve the problems affecting the life of the car muffler box and the reliability of the whole machine, and achieve the effects of improving mechanical properties, saving product materials, and reducing dirt inclusion.

Inactive Publication Date: 2016-04-06
HEFEI ZHONGLAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the conditions of mass production, the traditional technology can no longer meet the current design and production needs. In the case of long-term and undulating road conditions, the silencer box is prone to premature failure or scratches, which seriously affects the life of the car silencer box and the reliability of the whole machine. sex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] A kind of preparation method of anti-scratch automobile muffler box, comprises the following steps:

[0020] a. Liquid steel preparation

[0021] The weight percentage of chemical composition in molten steel is: 1.2%≤C≤1.4%, 0.7%≤Si≤0.9%, 0.3%≤Mn≤0.5%, 0.001%≤P≤0.005%, 0.002%≤S≤0.006%, 0.1 %≤Ti≤0.3%, 1.4%≤Cr≤1.6%, trace ≤B≤0.0018%, 0.08%≤V≤0.12%, 0.08%≤Cu≤0.12%, the balance is iron and unavoidable impurities;

[0022] b. Stamping step

[0023] Cast the above molten steel into a billet, place the billet in a stamping die, and make a silencer speaker blank through stamping and stretching processes;

[0024] c. Raise the temperature of the muffler box blank to 585°C, and feed ammonia gas at 1.3.5L / min at the same time, control the furnace pressure at 0.65Pa, and then perform salt bath quenching. 1h, the weight ratio of each component of the molten salt is: 12 parts of soda ash, 7 parts of magnesium chloride, 9 parts of aluminum carbonate, 3 parts of potassium carbonate,...

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Abstract

The invention discloses a preparation method for an anti-scratch automobile sound-reducing box. Molten steel comprises, by weight, larger than or equal to 1.2% and smaller than or equal to 1.4% of C, larger than or equal to 0.7% and smaller than or equal to 0.9% of Si, larger than or equal to 0.3% and smaller than or equal to 0.5% of Mn, larger than or equal to 0.001% and smaller than or equal to 0.005% of P, larger than or equal to 0.002% and smaller than or equal to 0.006% of S, larger than or equal to 0.1% and smaller than or equal to 0.3% of Ti, larger than or equal to 1.4% and smaller than or equal to 1.6% of Cr, larger than or equal to trace and smaller than or equal to 0.0018% of B, larger than or equal to 0.08% and smaller than or equal to 0.12% of V, larger than or equal to 0.08% and smaller than or equal to 0.12% of Cu and the balance Fe and inevitable impurities. According to the preparation method for the anti-scratch automobile sound-reducing box, mass industrial production is facilitated, the phenomena of pollution clamping and non-filling in the forging process are reduced, the mechanical property of products is further improved, product materials are saved, and the anti-scratch performance is achieved.

Description

technical field [0001] The invention relates to the field of auto parts, in particular to a method for preparing a scratch-resistant auto muffler box. Background technique [0002] The car silencer is an important part of the engine. Its material is made of carbon structural steel or ductile iron. There are two important parts: the design requirements are high, and because of the harsh working conditions of the car Crankshaft materials, crankshaft dimensional accuracy, surface roughness, heat treatment and surface strengthening, dynamic balance and other requirements are very strict. Under the conditions of mass production, the traditional technology can no longer meet the current design and production needs. In the case of long-term and undulating road conditions, the silencer box is prone to premature failure or scratches, which seriously affects the life of the car silencer box and the reliability of the whole machine. sex. Contents of the invention [0003] The purpo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/14C22C38/18C22C38/12C22C38/16C21D1/18C21D1/607C21D1/74C21D8/00B23P15/00
CPCC22C38/02B23P15/00C21D1/18C21D1/607C21D1/74C21D8/005C22C38/002C22C38/04C22C38/12C22C38/14C22C38/16C22C38/18
Inventor 陈恒义
Owner HEFEI ZHONGLAN NEW MATERIAL TECH CO LTD
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