{"id":3823,"date":"2019-06-04T05:42:01","date_gmt":"2019-06-04T05:42:01","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=3823"},"modified":"2020-05-07T02:09:59","modified_gmt":"2020-05-07T02:09:59","slug":"common-microstructures-of-metal-and-alloy","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/ja\/%e9%87%91%e5%b1%9e%e3%81%a8%e5%90%88%e9%87%91%e3%81%ae%e5%85%b1%e9%80%9a%e5%be%ae%e7%b4%b0%e6%a7%8b%e9%80%a0\/","title":{"rendered":"8\u91d1\u5c5e\u3068\u5408\u91d1\u306e\u4e00\u822c\u7684\u306a\u5fae\u7d30\u69cb\u9020"},"content":{"rendered":"

Modern materials can be divided into four categories: metals, polymers, ceramics and composite materials. Despite the rapid development of macromolecule materials, steel is still the most widely used and most important material in the current engineering technology. What factors determine the dominant position of steel materials? Now let’s introduce it in detail.<\/p>

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I. \u30d5\u30a7\u30e9\u30a4\u30c8<\/h2>

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\"\"<\/figure>

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\"\"<\/figure>

\u2162.\u30bb\u30e1\u30f3\u30bf\u30a4\u30c8<\/h2>

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\"\"<\/figure>

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\"\"<\/figure>

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\"\"<\/figure>

V.\u30d9\u30a4\u30ca\u30a4\u30c8<\/h2>

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\"\"<\/figure>

\u3092\u3002\u4e0a\u90e8\u30d9\u30a4\u30ca\u30a4\u30c8: <\/h3>

\u4e0a\u90e8\u30d9\u30a4\u30ca\u30a4\u30c8\u306f\u3001\u30d5\u30a7\u30e9\u30a4\u30c8\u91dd\u8ef8\u306b\u5e73\u884c\u306a\u7d30\u3044\u30b9\u30c8\u30ea\u30c3\u30d7 (\u307e\u305f\u306f\u77ed\u3044\u30ed\u30c3\u30c9) \u30bb\u30e1\u30f3\u30bf\u30a4\u30c8\u3092\u4f34\u3046\u3001\u30b9\u30c8\u30ea\u30c3\u30d7 \u30d5\u30a7\u30e9\u30a4\u30c8\u306e\u5e73\u884c\u914d\u7f6e\u306b\u3088\u3063\u3066\u7279\u5fb4\u4ed8\u3051\u3089\u308c\u307e\u3059\u3002<\/p>

b.\u4e0b\u90e8\u30d9\u30a4\u30ca\u30a4\u30c8: <\/h3>

\u5fae\u7d30\u306a\u91dd\u72b6\u30d5\u30ec\u30fc\u30af\u3001\u7279\u5b9a\u306e\u65b9\u5411\u6027\u3092\u6301\u3061\u3001\u713c\u5165\u308c\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u3088\u308a\u3082\u6d78\u98df\u3092\u53d7\u3051\u3084\u3059\u304f\u3001\u713c\u304d\u623b\u3057\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306b\u975e\u5e38\u306b\u4f3c\u3066\u304a\u308a\u3001\u5149\u5b66\u9855\u5fae\u93e1\u3067\u306e\u8b58\u5225\u306f\u975e\u5e38\u306b\u96e3\u3057\u304f\u3001\u96fb\u5b50\u9855\u5fae\u93e1\u3067\u306e\u8b58\u5225\u306f\u5bb9\u6613\u3067\u3059\u3002\u91dd\u72b6\u30d5\u30a7\u30e9\u30a4\u30c8\u4e2d\u306b\u70ad\u5316\u7269\u304c\u6790\u51fa\u3057\u3001\u305d\u306e\u914d\u5411\u65b9\u4f4d\u306f\u30d5\u30a7\u30e9\u30a4\u30c8\u30b7\u30fc\u30c8\u306e\u9577\u8ef8\u306b\u5bfe\u3057\u306655\uff5e60\u5ea6\u3067\u3001\u4e0b\u90e8\u30d9\u30a4\u30ca\u30a4\u30c8\u306f\u53cc\u6676\u3092\u542b\u307e\u305a\u3001\u8ee2\u4f4d\u304c\u591a\u3044\u3002<\/p>

\"\"<\/figure>

c.\u7c92\u72b6\u30d9\u30a4\u30ca\u30a4\u30c8\uff1a <\/h3>

\u591a\u89d2\u5f62\u3067\u4e0d\u898f\u5247\u306a\u5cf6\u72b6\u69cb\u9020\u304c\u591a\u3044\u30d5\u30a7\u30e9\u30a4\u30c8\u3002\u92fc\u306e\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u304c\u4e0a\u90e8\u30d9\u30a4\u30ca\u30a4\u30c8\u306e\u751f\u6210\u6e29\u5ea6\u3088\u308a\u5c11\u3057\u9ad8\u3044\u6e29\u5ea6\u307e\u3067\u51b7\u5374\u3055\u308c\u308b\u3068\u3001\u6790\u51fa\u3057\u305f\u30d5\u30a7\u30e9\u30a4\u30c8\u306e\u4e00\u90e8\u306e\u70ad\u7d20\u539f\u5b50\u304c\u3001\u30d5\u30a7\u30e9\u30a4\u30c8\/\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u76f8\u5883\u754c\u3092\u4ecb\u3057\u3066\u30d5\u30a7\u30e9\u30a4\u30c8\u304b\u3089\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u306b\u79fb\u52d5\u3057\u3001\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u304c\u4e0d\u5747\u4e00\u306b\u70ad\u7d20\u306b\u5bcc\u3080\u3088\u3046\u306b\u306a\u308a\u3001\u305d\u306e\u7d50\u679c\u3001\u304b\u3089\u306e\u5909\u614b\u304c\u6291\u5236\u3055\u308c\u307e\u3059\u3002\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u304b\u3089\u30d5\u30a7\u30e9\u30a4\u30c8\u3002\u3053\u308c\u3089\u306e\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u9818\u57df\u306f\u3001\u4e00\u822c\u306b\u5cf6\u72b6\u3001\u7c92\u72b6\u307e\u305f\u306f\u5e2f\u72b6\u3067\u3042\u308a\u3001\u30d5\u30a7\u30e9\u30a4\u30c8 \u30de\u30c8\u30ea\u30c3\u30af\u30b9\u4e0a\u306b\u5206\u5e03\u3057\u3066\u3044\u307e\u3059\u3002\u9023\u7d9a\u51b7\u5374\u4e2d\u3001\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u306e\u7d44\u6210\u3068\u51b7\u5374\u6761\u4ef6\u306b\u5fdc\u3058\u3066\u3001\u7c92\u5b50\u30d9\u30a4\u30eb\u5185\u306e\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u306f\u6b21\u306e\u3088\u3046\u306a\u5909\u5316\u3092\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>

(i) \u5168\u4f53\u307e\u305f\u306f\u4e00\u90e8\u306e\u30d5\u30a7\u30e9\u30a4\u30c8\u3068\u70ad\u5316\u7269\u3078\u306e\u5206\u89e3\u3002\u96fb\u5b50\u9855\u5fae\u93e1\u4e0b\u3067\u306f\u3001\u591a\u65b9\u5411\u306b\u5206\u6563\u3057\u305f\u7c92\u72b6\u3001\u68d2\u72b6\u3001\u307e\u305f\u306f\u5c0f\u3055\u306a\u30d6\u30ed\u30c3\u30af\u72b6\u306e\u70ad\u5316\u7269\u304c\u898b\u3089\u308c\u307e\u3059\u3002<\/p>

(ii) \u5149\u5b66\u9855\u5fae\u93e1\u4e0b\u3067\u5b8c\u5168\u306b\u9ec4\u8272\u3067\u3042\u308b\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u3078\u306e\u90e8\u5206\u7684\u306a\u5909\u63db\u3002<\/p>

\"\"<\/figure>

(iii) \u70ad\u7d20\u304c\u8c4a\u5bcc\u306a\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/p>

\u7c92\u72b6\u70ad\u5316\u7269\u306f\u3001\u7c92\u72b6\u30d9\u30a4\u30ca\u30a4\u30c8\u306e\u30d5\u30a7\u30e9\u30a4\u30c8 \u30de\u30c8\u30ea\u30c3\u30af\u30b9\u4e0a\u306b\u5206\u5e03\u3057\u307e\u3059 (\u5cf6\u69cb\u9020\u306f\u3001\u3082\u3068\u3082\u3068\u70ad\u7d20\u306b\u5bcc\u3080\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u3067\u3042\u308a\u3001\u51b7\u5374\u3059\u308b\u3068\u30d5\u30a7\u30e9\u30a4\u30c8\u3068\u70ad\u5316\u7269\u306b\u5206\u89e3\u3059\u308b\u304b\u3001\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306b\u5909\u63db\u3059\u308b\u304b\u3001\u70ad\u7d20\u306b\u5bcc\u3080\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u7c92\u5b50\u306e\u307e\u307e\u306b\u306a\u308a\u307e\u3059)\u3002\u30d5\u30a7\u30b6\u30fc \u30d9\u30a4\u30ca\u30a4\u30c8\u3001\u30d5\u30a7\u30e9\u30a4\u30c8 \u30de\u30c8\u30ea\u30c3\u30af\u30b9\u3001\u30d5\u30a7\u30e9\u30a4\u30c8 \u30b7\u30fc\u30c8\u306e\u7e01\u306b\u6790\u51fa\u3057\u305f\u5e2f\u72b6\u306e\u70ad\u5316\u7269\u3002\u4e0b\u90e8\u30d9\u30a4\u30ca\u30a4\u30c8\u3001\u5c0f\u3055\u306a\u30d5\u30ec\u30fc\u30af\u70ad\u5316\u7269\u3092\u542b\u3080\u91dd\u72b6\u30d5\u30a7\u30e9\u30a4\u30c8\u3001\u9577\u8ef8\u306e\u30d5\u30a7\u30e9\u30a4\u30c8\u4e2d\u306e\u30d5\u30ec\u30fc\u30af\u70ad\u5316\u7269\u306f\u304a\u304a\u3088\u305d 55 \uff5e 60 \u5ea6\u306e\u89d2\u5ea6\u3067\u3059\u3002 <\/p>

VI. WEISHER’S TISSUE<\/h2>

\u30a6\u30a3\u30c9\u30de\u30f3\u30b7\u30e5\u30c6\u30c3\u30c6\u30f3\u69cb\u9020\u306f\u4e00\u7a2e\u306e\u904e\u71b1\u69cb\u9020\u3067\u3001\u30d5\u30a7\u30e9\u30a4\u30c8\u91dd\u304c\u4e92\u3044\u306b\u7d04 60 \u5ea6\u4ea4\u5dee\u3057\u3001\u92fc\u306e\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u306b\u57cb\u3081\u8fbc\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u7c97\u3044\u30a6\u30a3\u30c9\u30de\u30f3\u30b7\u30e5\u30c6\u30c3\u30c6\u30f3\u69cb\u9020\u306f\u3001\u92fc\u306e\u53ef\u5851\u6027\u3068\u976d\u6027\u3092\u4f4e\u4e0b\u3055\u305b\u3001\u8106\u3055\u3092\u5897\u52a0\u3055\u305b\u307e\u3059\u3002\u4e9c\u5171\u6790\u92fc\u3067\u306f\u3001\u904e\u71b1\u306b\u3088\u308a\u7c97\u5927\u7c92\u304c\u5f62\u6210\u3055\u308c\u3001\u51b7\u5374\u3059\u308b\u3068\u6025\u901f\u306b\u6790\u51fa\u3057\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u7c92\u754c\u306b\u6cbf\u3063\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6790\u51fa\u306b\u52a0\u3048\u3066\u3001\u4e00\u90e8\u306e\u30d5\u30a7\u30e9\u30a4\u30c8\u306f\u3001\u305b\u3093\u65ad\u30e1\u30ab\u30cb\u30ba\u30e0\u306b\u5f93\u3063\u3066\u7c92\u754c\u304b\u3089\u7c92\u307e\u3067\u5f62\u6210\u3055\u308c\u3001\u91dd\u72b6\u306b\u5225\u3005\u306b\u6790\u51fa\u3057\u307e\u3059\u3002\u3053\u306e\u5206\u5e03\u306e\u69cb\u9020\u3092 Widmanstatten \u69cb\u9020\u3068\u547c\u3073\u307e\u3059\u3002\u904e\u71b1\u3057\u305f\u8d85\u5171\u6790\u92fc\u3092\u51b7\u5374\u3059\u308b\u3068\u3001\u30bb\u30e1\u30f3\u30bf\u30a4\u30c8\u3082\u7c92\u754c\u304b\u3089\u7c92\u5185\u306b\u4f38\u3073\u3066\u30a6\u30a3\u30c9\u30de\u30f3\u30b7\u30e5\u30c6\u30c3\u30c6\u30f3\u7d44\u7e54\u3092\u5f62\u6210\u3057\u307e\u3059\u3002<\/p>

\"\"<\/figure>

\u2166.\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8<\/h2>
\"\"<\/figure>

\u03b1-Fe\u4e2d\u306e\u70ad\u7d20\u306e\u904e\u98fd\u548c\u56fa\u6eb6\u4f53\u306f\u3001\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u3068\u547c\u3070\u308c\u307e\u3059\u3002\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306f\u9ad8\u3044\u5f37\u5ea6\u3068\u786c\u5ea6\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u306e\u53ef\u5851\u6027\u306f\u4f4e\u304f\u3001\u307b\u3068\u3093\u3069\u30bc\u30ed\u3067\u3059\u3002\u8a18\u53f7M\u3067\u8868\u3055\u308c\u308b\u885d\u6483\u8377\u91cd\u306b\u8010\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306f\u3001\u904e\u51b7\u5374\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u304c\u6025\u901f\u306b\u51b7\u5374\u3055\u308c\u3001MS\u70b9\u3068Mf\u70b9\u306e\u9593\u3067\u305b\u3093\u65ad\u30e2\u30fc\u30c9\u304c\u5909\u5316\u3057\u305f\u7d50\u679c\u3067\u3059\u3002\u3053\u306e\u3068\u304d\u3001\u70ad\u7d20 (\u304a\u3088\u3073\u5408\u91d1\u5143\u7d20) \u306f\u6642\u9593\u5185\u306b\u62e1\u6563\u3067\u304d\u305a\u3001\u03b3-Fe \u306e\u683c\u5b50 (\u9762\u4e2d\u5fc3) \u304b\u3089 \u03b1-Fe \u306e\u683c\u5b50 (\u4f53\u306e\u4e2d\u5fc3)\u3001\u3064\u307e\u308a\u56fa\u6eb6\u4f53 (\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8) \u306b\u306e\u307f\u62e1\u6563\u3057\u307e\u3059\u3002 \u03b3-Fe\u4e2d\u306e\u70ad\u7d20\u304b\u3089\u03b1-Fe\u4e2d\u306e\u70ad\u7d20\u306e\u56fa\u6eb6\u4f53\u3078\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u5909\u614b\u306f\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306e\u91d1\u5c5e\u7d44\u7e54\u7279\u6027\u306b\u57fa\u3065\u3044\u3066\u304a\u308a\u3001\u30e9\u30b9\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8 (\u4f4e\u70ad\u7d20) \u3068\u91dd\u72b6\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306b\u5206\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>

\"\"<\/figure>

\u3092\u3002\u30e9\u30b9\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8: <\/h3>

\u4f4e\u70ad\u7d20\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002\u307b\u307c\u540c\u3058\u30b5\u30a4\u30ba\u306e\u5fae\u7d30\u306a\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8 \u30b9\u30c8\u30ea\u30c3\u30d7\u304c\u5e73\u884c\u306b\u6574\u5217\u3057\u3066\u3001\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8 \u30d0\u30f3\u30c9\u30eb\u307e\u305f\u306f\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8 \u30c9\u30e1\u30a4\u30f3\u3092\u5f62\u6210\u3057\u307e\u3059\u3002\u30c9\u30e1\u30a4\u30f3\u3068\u30c9\u30e1\u30a4\u30f3\u306e\u65b9\u4f4d\u5dee\u304c\u5927\u304d\u304f\u3001\u539f\u59cb\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u7c92\u5185\u306b\u65b9\u4f4d\u306e\u7570\u306a\u308b\u3044\u304f\u3064\u304b\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u5f62\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30e9\u30b9\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u5f62\u6210\u306e\u6e29\u5ea6\u304c\u9ad8\u3044\u305f\u3081\u3001\u51b7\u5374\u30d7\u30ed\u30bb\u30b9\u3067\u5fc5\u7136\u7684\u306b\u81ea\u5df1\u713c\u304d\u623b\u3057\u306e\u73fe\u8c61\u304c\u767a\u751f\u3057\u3001\u5f62\u6210\u3055\u308c\u305f\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306b\u70ad\u5316\u7269\u304c\u6790\u51fa\u3059\u308b\u305f\u3081\u3001\u6d78\u98df\u3084\u9ed2\u5316\u306b\u5bfe\u3057\u3066\u8106\u5f31\u3067\u3059\u3002<\/p>

 b.\u91dd\u72b6\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8:<\/h3>

\u30d5\u30ec\u30fc\u30af \u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u307e\u305f\u306f\u9ad8\u70ad\u7d20\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u3068\u3082\u547c\u3070\u308c\u3001\u305d\u306e\u57fa\u672c\u7684\u306a\u7279\u5fb4\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u7c92\u5185\u306b\u5f62\u6210\u3055\u308c\u308b\u6700\u521d\u306e\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8 \u30b7\u30fc\u30c8\u306f\u6bd4\u8f03\u7684\u5927\u304d\u304f\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u5168\u7c92\u306b\u308f\u305f\u3063\u3066\u3001\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u7c92\u306f\u5206\u5272\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u5f8c\u3067\u5f62\u6210\u3055\u308c\u308b\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306e\u30b5\u30a4\u30ba\u306f\u5236\u9650\u3055\u308c\u307e\u3059\u3002\u306e\u3067\u3001\u30d5\u30ec\u30fc\u30af\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306e\u30b5\u30a4\u30ba\u306f\u3055\u307e\u3056\u307e\u3067\u3001\u4e0d\u898f\u5247\u306b\u5206\u5e03\u3057\u3066\u3044\u307e\u3059\u3002\u91dd\u72b6\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306f\u4e00\u5b9a\u65b9\u5411\u306b\u5f62\u6210\u3055\u308c\u308b\u3002\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u91dd\u306b\u4e2d\u5c3e\u6839\u304c\u3042\u308a\u307e\u3059\u3002\u70ad\u7d20\u542b\u6709\u91cf\u304c\u9ad8\u3044\u307b\u3069\u3001\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u304c\u3088\u308a\u660e\u767d\u306b\u306a\u308a\u307e\u3059\u3002\u540c\u6642\u306b\u3001\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u9593\u306b\u767d\u3044\u6b8b\u7559\u30aa\u30fc\u30b9\u30c6\u30ca\u30a4\u30c8\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>

\"\"<\/figure>

 c.\u713c\u5165\u308c\u5f8c\u306b\u5f62\u6210\u3055\u308c\u305f\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306f\u3001\u713c\u623b\u3057\u5f8c\u306b 3 \u3064\u306e\u7279\u6b8a\u306a\u91d1\u5c5e\u7d44\u7e54\u3092\u5f62\u6210\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/h3>

(i) \u713c\u623b\u3057\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8: <\/h4>

the composite of sheet martensite formed during quenching (with a crystal structure of tetragonal body center) which is decomposed in the first stage of tempering, in which carbon is desolved in the form of transition carbides, and extremely fine transition carbide sheets dispersed in the solid solution matrix (whose crystal structure has changed into body-centered cube) (the interface with the matrix is a coherent interface) Phase structure. this kind of structure can not distinguish its internal structure even when magnified to the maximum magnification under metallographic (optical) microscope, only can see that its whole structure is black needle (the shape of black needle is basically the same as that of white needle formed during quenching). This kind of black needle is called “tempered martensite”.<\/p>

\"\"<\/figure>

(ii) \u713c\u304d\u623b\u3057\u30c8\u30eb\u30fc\u30b9\u30bf\u30a4\u30c8: <\/h4>

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\"\"<\/figure>

(iii) \u5f37\u5316\u30bd\u30eb\u30d0\u30a4\u30c8: <\/h4>

\u9ad8\u6e29\u3067\u713c\u623b\u3057\u3055\u308c\u305f\u6025\u51b7\u30de\u30eb\u30c6\u30f3\u30b5\u30a4\u30c8\u306e\u88fd\u54c1\u3002\u305d\u306e\u7279\u5fb4\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002\u5fae\u7d30\u306a\u7c92\u72b6\u306e\u70ad\u5316\u7269\u304c\u30bd\u30eb\u30d0\u30a4\u30c8 \u30de\u30c8\u30ea\u30c3\u30af\u30b9\u4e0a\u306b\u5206\u5e03\u3057\u3066\u304a\u308a\u3001\u5149\u5b66\u9855\u5fae\u93e1\u4e0b\u3067\u660e\u78ba\u306b\u533a\u5225\u3067\u304d\u307e\u3059\u3002\u6761\u4ef6\u4ed8\u304d\u69cb\u9020\u3068\u3082\u547c\u3070\u308c\u308b\u3053\u306e\u7a2e\u306e\u69cb\u9020\u306f\u3001\u5f37\u5ea6\u3068\u976d\u6027\u306e\u512a\u308c\u305f\u7d44\u307f\u5408\u308f\u305b\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002\u30d5\u30a7\u30e9\u30a4\u30c8\u306e\u5fae\u7d30\u306a\u70ad\u5316\u7269\u304c\u5fae\u7d30\u306b\u306a\u308b\u307b\u3069\u3001\u786c\u5ea6\u3068\u5f37\u5ea6\u304c\u9ad8\u304f\u306a\u308a\u3001\u976d\u6027\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002\u53cd\u5bfe\u306b\u3001\u786c\u5ea6\u3068\u5f37\u5ea6\u304c\u4f4e\u304f\u3001\u976d\u6027\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002<\/p>

\u2167.\u30ec\u30c7\u30d6\u30e9\u30a4\u30c8<\/h2>
\"\"<\/figure>

The eutectic mixtures in FERROCARBON alloys, i.e. liquid FERROCARBON alloys with a mass fraction of carbon (carbon content) of 4.3%, are called ledeburite when the mechanical mixtures of austenite and cementite crystallize simultaneously from the liquid at 1480 degrees Celsius. Since austenite transforms into pearlite at 727 C, ledeburite is composed of pearlite and cementite at room temperature. In order to distinguish the ledeburite above 727 C is called high-temperature ledeburite (L d), and the ledeburite below 727 C is called low-temperature ledeburite (L’d). The properties of ledeburite are similar to those of cementite with high hardness and poor plasticity.<\/p>

\"\"<\/figure><\/div>","protected":false},"excerpt":{"rendered":"

Modern materials can be divided into four categories: metals, polymers, ceramics and composite materials. Despite the rapid development of macromolecule materials, steel is still the most widely used and most important material in the current engineering technology. What factors determine the dominant position of steel materials? Now let’s introduce it in detail. Iron and steel are extracted from iron ore, rich in sources and low in price. Iron and steel, also known as iron-carbon alloy, is an alloy composed of iron (Fe) and carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S) and other small elements (Cr, V, etc.). Various metallographic structures can be obtained by adjusting the content…<\/p>","protected":false},"author":2,"featured_media":19470,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[79],"tags":[],"class_list":["post-3823","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-materials-weekly"],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2019\/06\/1-6.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/ja\/wp-json\/wp\/v2\/posts\/3823","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ja\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ja\/wp-json\/wp\/v2\/comments?post=3823"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/ja\/wp-json\/wp\/v2\/posts\/3823\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ja\/wp-json\/wp\/v2\/media\/19470"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/ja\/wp-json\/wp\/v2\/media?parent=3823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ja\/wp-json\/wp\/v2\/categories?post=3823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/ja\/wp-json\/wp\/v2\/tags?post=3823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}