Preparation method of material suitable for diesel engine cylinder cover

A technology for diesel engines and cylinder heads, applied in manufacturing tools, casting equipment, metal processing equipment, etc., can solve the problems of high cost, low performance, and difficulty in improving product market competitiveness, and achieve reduced shrinkage and wear resistance. Excellent, improve the effect of product quality and reliability
CN110373601AInactive Publication Date: 2019-10-25GUANGXI UNIV
9 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGXI UNIV
Publication Date
2019-10-25
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a preparation method of a material suitable for a diesel engine cylinder cover. The preparation method of the material suitable for the diesel engine cylinder cover comprisesthe following steps of (1) adopting steel scraps and foundry return as furnace charges, sequentially adding into an intermediate frequency furnace, melting to obtain molten iron, and adding a petroleum coke carburant when the temperature of the molten iron reaches to 1400 DEG C; (2) when the temperature of the molten iron reaches to 1530 to 1560 DEG C, adding ferro manganese nitride, uniformly stirring, and tapping after preserving heat for 8 to 12 minutes; (3) adding an inoculator into a ladle for the first time, starting inoculation treatment for the second time when the molten iron in the ladle accounts for one third of the tapping amount, and adding a metal-stream inoculation agent for the third time in the molten iron pouring process; and (4) adopting a sand-lined metal mold casting mold for pouring to obtain a gray cast iron material suitable for the diesel engine cylinder cover. According to the preparation method of the material suitable for the diesel engine cylinder cover provided by the invention, through adding a nitrogen element, reducing the alloy element content, improving the inoculation times and combining a sand-lined metal mold process for casting, so that the mechanical property and the strength of the gray iron material are remarkably improved, and the cracking problem caused by low material strength and heat fatigue of the diesel engine cylinder cover at present are solved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of diesel engines, in particular to a method for preparing materials suitable for diesel engine cylinder heads. Background technique

[0002] With the continuous development of high-horsepower and high-speed engines, higher requirements are placed on cylinder head materials, which not only require high strength and toughness, but also require good wear resistance and fatigue performance. Most of the high-strength cylinder head gray cast iron materials on the market are increased by adding alloys, which increases the cost, reduces the competitiveness of the market, and affects the overall development of the engine factory. In order to solve this problem, it is necessary to develop a gray cast iron material with less alloy addition but improved strength to adapt to the development of the market.

[0003] At present, the common production method of gray cast iron cylinder head is: pig iron, scrap steel, return...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More