SAE AMS 2753D-2019

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http://standards.sae.org/AMS2753D

AEROSPACE

MATERIAL SPECIFICATION

AMS2753™

REV. D

Issued 1985-01

Revised 2008-08

Reaffirmed 2015-06

Stabilized 2019-07

Superseding AMS2753C

Liquid Salt Bath Ferritic Nitrocarburizing Non-Cyanide Bath

RATIONALE

AMS2753D stabilizes this document because this document contains mature technology that is not expected to change and

thus no further revisions are anticipated.

STABILIZED NOTICE

AMS2753D has been declared "STABILIZED" by AMS Committee B Finishes, Processes and Fluids Committee. This

document will no longer be updated and may no longer represent standard industry practice. Previously this document was

reaffirmed. The last technical update of this document occurred in August 2008. Users of this document should refer any

certification issues (e.g. exceptions listed on the certification report) to the cognizant engineering organization for their

disposition.

NOTE: In many cases the purchaser may be a sub tier supplier and not the cognizant engineering organization.

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1. SCOPE

1.1 Purpose

This specification covers the requirements for an epsilon-iron nitride case on ferrous parts produced by immersion in a

low-temperature, agitated, fused salt bath.

1.2 Application

Nitrocarburized surfaces have been used typically for increasing the resistance to wear and fatigue on ferrous alloys

including carbon steels, low-alloy steels, tool steels, and corrosion-resistant steels, cast irons, and ferrous powder metal

products, but usage is not limited to such applications.

1.2.1 This process is not recommended for use on parts that have been plated with silver, copper, zinc, or cadmium or

on parts having copper alloy inserts.

1.3 Safety - Hazardous Materials

While the materials, methods, applications, and processes described or referenced in this specification may involve the

use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the

sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take

necessary precautionary measures to ensure the health and safety of all personnel involved.

2. APPLICABLE DOCUMENTS

The issue of the following documents in effect on the date of the purchase order forms a part of this specification to the

extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue

is specified. When the referenced document has been cancelled and no superseding document has been specified, the

last published issue of that document shall apply.

SAE INTERNATIONAL

AMS2753™D

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2.1 SAE Publications

Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside

USA and Canada) or 724-776-4970 (outside USA), www.sae.org.

AMS2759 Heat Treatment of Steel Parts, General Requirements

ARP1820 Chord Method of Evaluating Surface Microstructural Characteristics

SAE J423 Methods of Measuring Case Depth

SAE J864 Surface Hardness Testing with Files

2.2 ASTM Publications

Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959,

Tel: 610-832-9585, www.astm.org.

ASTM D 1193 Reagent Water

ASTM E 140 Hardness Conversion Tables for Metals (Relationship Between Brinell Hardness, Vickers

Hardness, Rockwell Hardness, Rockwell Superficial Hardness, and Knoop Hardness)

ASTM E 384 Microhardness of Materials

ASTM E 407 Microetching Metals and Alloys

2.3 ASM Publications

Available from ASM World Headquarters, 9639 Kinsman Road, Materials Park, OH 44073, Tel: 440-338-5151,

www.asminternational.org.

ASM Handbook, Metallography and Microstructure, 9th Edition

3. TECHNICAL REQUIREMENTS

3.1 Processing Equipment

3.1.1 Nitrocarburizing salts shall consist primarily of a mixture of alkali metal cyanates and carbonates.

3.1.2 Salt Bath

The cyanate content of the bath shall be controlled within the range 34 to 38% by weight, determined as cyanate ion.

3.1.3 Parts shall be processed in a salt bath retort-type furnace.

3.1.4 Furnace pyrometry shall conform to AMS2750 furnace class 3, instrumentation type D, as a minimum.

3.1.5 Thermocouples

When load thermocouples are required, they shall be sheath protected to prevent deterioration due to immersion in

nitrocarburizing salts.

SAE INTERNATIONAL

AMS2753™D

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摘要：

SAE AMS 2753D-2019 是由美国汽车工程师学会（SAE）发布的航空航天材料规范，标题为“熔融焊剂固溶热处理（Flux-Solvent Solution Heat Treatment）”。该标准主要适用于航空航天领域中使用熔融焊剂进行固溶热处理工艺的专业指南，涵盖了高温合金、钛合金等关键材料的处理流程、温度控制要求、焊剂纯度标准以及设备校准规范。与旧版相比，2019年的D版本更新了加热速率、保温时间及环境控制的技术参数，以确保材料在微观结构优化后获得最佳的力学性能与耐腐蚀性。本标准对

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